Exhibit 1.1

EXECUTION VERSION

QUINTANA ENERGY SERVICES INC.

(a Delaware corporation)

9,259,259 Shares of Common Stock

UNDERWRITING AGREEMENT

Dated: February 8, 2018

QUINTANA ENERGY SERVICES INC.

(a Delaware corporation)

9,259,259 Shares of Common Stock

UNDERWRITING AGREEMENT

February 8, 2018

Merrill Lynch, Pierce, Fenner & Smith

Incorporated

Piper Jaffray & Co.

as Representatives of the several Underwriters

c/o Merrill Lynch, Pierce, Fenner & Smith

Incorporated

One Bryant Park

New York, New York 10036

Ladies and Gentlemen:

Quintana Energy Services Inc., a Delaware corporation (the “Company”) confirms its agreement with Merrill Lynch, Pierce, Fenner & Smith Incorporated (“Merrill Lynch”) and each of the other Underwriters named in Schedule A hereto (collectively, the “Underwriters,” which term shall also include any underwriter substituted as hereinafter provided in Section  10 hereof), for whom Merrill Lynch and Piper Jaffray & Co. (“Piper Jaffray”) are acting as representatives (in such capacity, the “Representatives”), with respect to (i) the sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of the respective numbers of shares of Common Stock, par value $0.01 per share, of the Company (“Common Stock”) set forth in Schedule  A hereto and (ii) the grant by the Company to the Underwriters, acting severally and not jointly, of the option described in Section  2(b) hereof to purchase all or any part of 1,388,889 additional shares of Common Stock. The aforesaid 9,259,259 shares of Common Stock (the “Initial Securities”) to be purchased by the Underwriters and all or any part of the 1,388,889 shares of Common Stock subject to the option described in Section  2(b) hereof (the “Option Securities”) are herein called, collectively, the “Securities.”

The Company understands that the Underwriters propose to make a public offering of the Securities as soon as the Representatives deem advisable after this Underwriting Agreement (this “Agreement”) has been executed and delivered.

It is further understood and agreed to by all parties hereto that the following transactions have occurred or will occur on or immediately prior to the Closing Time (as defined below), pursuant to that certain Master Reorganization Agreement to be entered into on or prior to the Closing Time (the “Reorganization Agreement”):

(a) The Company will directly or indirectly acquire all of the outstanding equity interests in QES Holdco LLC, a Delaware limited liability company (“QES Holdco”), and Quintana Energy Services LP, a Delaware limited partnership (“QES LP”). As a result, the Company will become the holding company for QES Holdco (which will be merged with and into QES LP), QES LP and the subsidiaries of QES LP;

(b) The Company will issue shares of Common Stock to certain existing investors in exchange for their respective direct or indirect common units representing limited partner interests in QES LP (the “Common Units”), including shares issued pursuant to the net exercise of warrants (as described below), and their director or indirect membership interests in QES Holdco;

(c) All outstanding warrants, which are held by (i) Archer Holdco LLC, a Texas limited liability company (“Archer Holdco”), an affiliate of Archer Well Company, Inc., a Texas corporation, a subsidiary of Archer Limited, a limited company formed under the laws of Bermuda, (ii) Robertson QES Investment LLC, a Delaware limited liability company, (iii) Geveran Blocker, LLC, a Delaware limited liability company, and (iv) QES Investment Blocker, LLC, a Delaware limited liability company, will be net exercised for Common Units;

(d) The Company will consummate a 31.669363 for 1 reverse stock split (the “Reverse Stock Split”) of its issued and outstanding Common Stock effective immediately prior to the consummation of the offering contemplated by this Agreement and the Term Loan Conversion (as defined below);

(e) approximately $33.6 million of outstanding indebtedness under the Term Loan (as defined below) will convert into shares of Common Stock at the price per share set forth in Schedule A for shares of Common Stock (the “Term Loan Conversion”); and

(f) Prior to the Closing Time, the Company shall (i) file with the Secretary of State of the State of Delaware (the “Delaware Secretary of State”) the Second Certificate of Amendment to Certificate of Incorporation of the Company; (ii) file with the Delaware Secretary of State the Amended and Restated Certificate of Incorporation of the Company (the “Certificate of Incorporation”) and (ii) enter into the Amended and Restated Bylaws of the Company (the “Bylaws”).

The transactions contemplated in subsections (a) through (f) above are referred to herein as the “Transactions.” The “Transaction Documents” shall mean the Reorganization Agreement, the Certificate of Incorporation and the Bylaws. The Quintana Parties shall mean the Company, QES LP and QES Holdco.

The Company currently has two credit facilities in place: (a) the Credit Agreement, dated as of September 9, 2014, as amended, among the Partnership, as borrower, certain of its subsidiaries party thereto, as guarantors, the lenders from time to time party thereto, and ZB, N.A. DBA Amegy Bank (f/k/a Amegy Bank National Association), as administrative agent (the “Revolving Credit Facility”) and (b) the Second Lien Credit Agreement, dated December 19, 2016, by and among the Partnership, as borrower, certain of its subsidiaries party thereto, as guarantors, the lenders from time to time party thereto and Cortland Capital Market Services LLC, as administrative agent (the “Term Loan,” and together with the Revolving Credit Facility, the “Existing Credit Facilities”). Concurrently with and conditioned upon the sale of the Securities to the Underwriters, the Company expects to repay the outstanding indebtedness under the Existing Credit Facilities with a portion of the proceeds from the sale of the Securities and enter into a new revolving credit facility evidenced by a new loan, security and guaranty agreement with Bank of America, N.A., as administrative agent, and certain other financial institutions (the “New Credit Facility”).

The Company and the Underwriters agree that up to 5% of the Initial Securities to be purchased by the Underwriters (the “Reserved Securities”) shall be reserved for sale by the Underwriters to certain persons designated by the Company (the “Invitees”), as part of the distribution of the Securities by the

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Underwriters, subject to the terms of this Agreement, the applicable rules, regulations and interpretations of the Financial Industry Regulatory Authority, Inc. (“FINRA”) and all other applicable laws, rules and regulations. The Company has solely determined, without any direct or indirect participation by the Underwriters, the Invitees who will purchase Reserved Securities (including the amount to be purchased by such persons) sold by the Underwriters. To the extent that such Reserved Securities are not orally confirmed for purchase by Invitees by 11:59 P.M. (New York City time) on the date of this Agreement, such Reserved Securities may be offered to the public as part of the public offering contemplated hereby.

The Company has filed with the Securities and Exchange Commission (the “Commission”) a registration statement on Form S-1 (No. 333-219837), including the related preliminary prospectus or prospectuses, covering the registration of the sale of the Securities under the Securities Act of 1933, as amended (the “1933 Act”). Promptly after execution and delivery of this Agreement, the Company will prepare and file a prospectus in accordance with the provisions of Rule 430A (“Rule 430A”) of the rules and regulations of the Commission under the 1933 Act (the “1933 Act Regulations”) and Rule 424(b) (“Rule 424(b)”) of the 1933 Act Regulations. The information included in such prospectus that was omitted from such registration statement at the time it became effective but that is deemed to be part of such registration statement at the time it became effective pursuant to Rule 430A(b) is herein called the “Rule 430A Information.” Such registration statement, including the amendments thereto, the exhibits thereto and any schedules thereto, at the time it became effective, and including the Rule 430A Information, is herein called the “Registration Statement.” Any registration statement filed pursuant to Rule 462(b) of the 1933 Act Regulations is herein called the “Rule 462(b) Registration Statement” and, after such filing, the term “Registration Statement” shall include the Rule 462(b) Registration Statement. Each prospectus used prior to the effectiveness of the Registration Statement, and each prospectus that omitted the Rule 430A Information that was used after such effectiveness and prior to the execution and delivery of this Agreement, is herein called a “preliminary prospectus.” The final prospectus, in the form first furnished to the Underwriters for use in connection with the offering of the Securities, is herein called the “Prospectus.” For purposes of this Agreement, all references to the Registration Statement, any preliminary prospectus, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval system or any successor system (“EDGAR”).

As used in this Agreement:

“Applicable Time” means 10:15 P.M., New York City time, on February 8, 2018 or such other time as agreed by the Company and the Representatives.

“General Disclosure Package” means any Issuer General Use Free Writing Prospectuses issued at or prior to the Applicable Time, the most recent preliminary prospectus that is distributed to investors prior to the Applicable Time and the information included on Schedule B -1 hereto, all considered together.

“Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433 of the 1933 Act Regulations (“Rule 433”), including without limitation any “free writing prospectus” (as defined in Rule 405 of the 1933 Act Regulations (“Rule 405”)) relating to the Securities that is (i) required to be filed with the Commission by the Company, (ii) a “road show that is a written communication” within the meaning of Rule 433(d)(8)(i), whether or not required to be filed with the Commission, or (iii) exempt from filing with the Commission pursuant to Rule 433(d)(5)(i) because it contains a description of the Securities or of the offering that does not reflect the final terms, in each case in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g).

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“Issuer General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors (other than a “ bona fide electronic road show,” as defined in Rule 433 (the “Bona Fide Electronic Road Show”)), as evidenced by its being specified in Schedule B-2 hereto.

“Issuer Limited Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is not an Issuer General Use Free Writing Prospectus.

“Testing-the-Waters Communication” means any oral or written communication with potential investors undertaken in reliance on Section  5(d) of the 1933 Act.

“Written Testing-the-Waters Communication” means any Testing-the-Waters Communication that is a written communication within the meaning of Rule 405 under the 1933 Act.

SECTION 1. Representations and Warranties .

(a) Representations and Warranties by the Company . The Company represents and warrants to each Underwriter as of the date hereof, the Applicable Time, the Closing Time and any Date of Delivery (as defined below), and agrees with each Underwriter, as follows:

(i) Registration Statement and Prospectuses . Each of the Registration Statement and any post-effective amendment thereto has become effective under the 1933 Act. No stop order suspending the effectiveness of the Registration Statement or any post-effective amendment thereto has been issued under the 1933 Act, no order preventing or suspending the use of any preliminary prospectus or the Prospectus has been issued and no proceedings for any of those purposes have been instituted or are pending or, to the Company’s knowledge, contemplated. The Company has complied with each request (if any) from the Commission for additional information.

Each of the Registration Statement and any post-effective amendment thereto, at the time it became effective, complied in all material respects with the requirements of the 1933 Act and the 1933 Act Regulations. Each preliminary prospectus, the Prospectus and any amendment or supplement thereto, at the time each was filed with the Commission, complied in all material respects with the requirements of the 1933 Act and the 1933 Act Regulations. Each preliminary prospectus delivered to the Underwriters for use in connection with this offering and the Prospectus was or will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(ii) Accurate Disclosure . Neither the Registration Statement nor any post-effective amendment thereto, at its effective time, at the Closing Time or at any Date of Delivery, contained, contains or will contain an untrue statement of a material fact or omitted, omits or will omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading. As of the Applicable Time, none of (A) the General Disclosure Package, (B) any individual Issuer Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package or (C) any individual Written Testing-the-Waters Communication, when considered together with the General Disclosure Package, included, includes or will include an untrue statement of a material fact or omitted, omits or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. Neither the Prospectus nor any amendment or supplement thereto (including any prospectus wrapper), as of its issue date, at the

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time of any filing with the Commission pursuant to Rule 424(b), at the Closing Time or at any Date of Delivery, included, includes or will include an untrue statement of a material fact or omitted, omits or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

The representations and warranties in this subsection shall not apply to statements in or omissions from the Registration Statement (or any amendment thereto), the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) made in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives expressly for use therein. For purposes of this Agreement, the only information so furnished shall be the information in the first paragraph under the heading “Underwriting (Conflicts of Interest)—Commissions and Discounts,” the information in the second, third and fourth paragraphs under the heading “Underwriting (Conflicts of Interest)—Price Stabilization, Short Positions and Penalty Bids” and the information under the heading “Underwriting (Conflicts of Interest)—Electronic Distribution,” in each case contained in the Prospectus (collectively, the “Underwriter Information”).

(iii) Issuer Free Writing Prospectuses . No Issuer Free Writing Prospectus conflicts or will conflict with the information contained in the Registration Statement or the Prospectus, and any preliminary prospectus or other prospectus deemed to be a part thereof that has not been superseded or modified. The Company has made available a Bona Fide Electronic Road Show in compliance with Rule 433(d)(8)(ii) such that no filing of any “road show” (as defined in Rule 433(h)) is required in connection with the offering of the Securities.

(iv) Testing-the-Waters Materials . The Company has not (A) engaged in any Testing-the-Waters Communication other than Testing-the-Waters Communications with the consent of the Representatives with entities that are qualified institutional buyers within the meaning of Rule 144A of the 1933 Act Regulations or institutions that are accredited investors within the meaning of Rule 501 under the 1933 Act and (B) authorized anyone other than the Representatives to engage in Testing-the-Waters Communications. The Company reconfirms that the Representatives have been authorized to act on its behalf in undertaking Testing-the-Waters Communications. The Company has not distributed any Written Testing-the-Waters Communications other than those listed on Schedule B-3 hereto.

(v) Company Not Ineligible Issuer . At the time of filing the Registration Statement and any post-effective amendment thereto, at the earliest time thereafter that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) of the 1933 Act Regulations) of the Securities and at the date hereof, the Company was not and is not an “ineligible issuer,” as defined in Rule 405, without taking account of any determination by the Commission pursuant to Rule 405 that it is not necessary that the Company be considered an ineligible issuer.

(vi) Emerging Growth Company Status . From the time of the initial confidential submission of the Registration Statement to the Commission (or, if earlier, the first date on which the Company engaged directly or through any Person authorized to act on its behalf in any Testing-the-Waters Communication) through the date hereof, the Company has been and is an “emerging growth company,” as defined in Section 2(a) of the 1933 Act (an “Emerging Growth Company”).

(vii) Independent Accountants . The accountants who certified the financial statements and supporting schedules included in the Registration Statement, the General Disclosure Package and the Prospectus are independent public accountants as required by the 1933 Act, the 1933 Act Regulations and the Public Company Accounting Oversight Board.

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(viii) Financial Statements; Non-GAAP Financial Measures . The financial statements included in the Registration Statement, the General Disclosure Package and the Prospectus, together with the related schedules and notes, present fairly the financial position of the Company, QES LP and the Archer Well Services Entities (“Archer”), as applicable, and their respective consolidated subsidiaries, at the dates indicated and the consolidated statement of operations, stockholders’ equity, partners’ equity and cash flows of the Company, QES LP and Archer, and their consolidated subsidiaries, as applicable, for the periods specified, in each case on the basis stated in the Registration Statement; such consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods involved, except in the case of unaudited financial statements, which are subject to normal year-end adjustments and, as permitted by the applicable rules of the Commission, do not contain certain footnotes. The supporting schedules, if any, present fairly, in accordance with GAAP, the information required to be stated therein. The selected financial data and the summary financial information included in the Registration Statement, the General Disclosure Package and the Prospectus, together with the related notes thereto, present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included therein. The unaudited pro forma financial information and the related notes thereto included in the Registration Statement, the General Disclosure Package and the Prospectus, present fairly the information shown therein, have been prepared in accordance with the Commission’s rules and guidelines with respect to pro forma financial statements and have been properly compiled on the bases described therein, and the assumptions used in the preparation thereof are reasonable and the adjustments used therein are appropriate to give effect to the transactions and circumstances referred to therein. Except as included therein, no historical or pro forma financial statements or supporting schedules are required to be included or incorporated by reference in the Registration Statement, the General Disclosure Package or the Prospectus under the 1933 Act or the 1933 Act Regulations, and the Company does not have any material liabilities or obligations, direct or contingent (including any off-balance sheet obligations), not described in the Registration Statement (excluding the exhibits thereto), the General Disclosure Package and the Prospectus. All disclosures contained in the Registration Statement, the General Disclosure Package or the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the rules and regulations of the Commission) comply with Regulation G of the Securities Exchange Act of 1934, as amended (the “1934 Act”) and Item 10 of Regulation S-K of the 1933 Act, to the extent applicable.

(ix) No Material Adverse Change in Business . Except as otherwise stated therein, since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, (A) there has been no material adverse change in the condition, financial or otherwise, or in the earnings, management, business affairs or business prospects of the Company and its subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business (a “Material Adverse Effect”), (B) there have been no transactions entered into by the Company or any of its subsidiaries, other than those in the ordinary course of business, which are material with respect to the Company and its subsidiaries considered as one enterprise, and (C) there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock.

(x) Good Standing of the Company . The Company has been duly organized and is validly existing as a corporation in good standing under the laws of the State of Delaware and has the corporate power and authority to own, lease and operate its properties and to conduct its

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business as described in the Registration Statement, the General Disclosure Package and the Prospectus and to enter into and perform its obligations under this Agreement and the Transaction Documents; and the Company is, or at the Closing Time and at each Delivery Date will be, duly qualified as a foreign corporation to transact business and is in good standing in each other jurisdiction in which such qualification is required, or at the Closing Time and at each Delivery Date will be, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not reasonably be expected to result in a Material Adverse Effect.

(xi) Good Standing of Subsidiaries . As of the completion of the Transactions contemplated by the Transaction Documents, each “significant subsidiary” of the Company (as such term is defined in Rule 1-02 of Regulation S-X) (each, a “Subsidiary” and, collectively, the “Subsidiaries”) has been duly organized and is validly existing in good standing under the laws of the jurisdiction of its incorporation or organization, has corporate or similar power and authority to own, lease and operate its properties and to conduct its business as described in the Registration Statement, the General Disclosure Package and the Prospectus and is duly qualified to transact business and is in good standing in each jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure to so qualify or to be in good standing would not reasonably be expected to result in a Material Adverse Effect. As of the completion of the Transactions contemplated in the Transaction Documents, except as otherwise disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, all of the issued and outstanding capital stock of each Subsidiary has been duly authorized and validly issued, is fully paid and non-assessable and is owned by the Company, directly or through subsidiaries, free and clear of any Lien (as defined below), except for those securing indebtedness under the Existing Credit Facilities or those which will secure the indebtedness under the New Credit Facility, or equity. None of the outstanding shares of capital stock of any Subsidiary were issued in violation of the preemptive or similar rights of any securityholder of such Subsidiary. The only subsidiaries of the Company as of the completion of the Transactions contemplated by this Agreement are (A) the subsidiaries listed on Exhibit 21.1 to the Registration Statement and (B) certain other subsidiaries which, considered in the aggregate as a single subsidiary, do not constitute a “significant subsidiary” as defined in Rule 1-02 of Regulation S-X.

(xii) Capitalization . As of the completion of the Transactions contemplated by the Transaction Documents, (A) The Company has taken all necessary corporate action to effectuate the Reverse Stock Split and (B) the authorized, issued and outstanding shares of capital stock of the Company are as set forth in the Registration Statement, the General Disclosure Package and the Prospectus in section headed “Capitalization.” The exercise of outstanding warrants to purchase Common Units and the Transactions are reflected in the Registration Statement, the General Disclosure Package and the Prospectus in the column entitled “As Adjusted” under the section headed “Capitalization.” As of the completion of the Transactions contemplated by the Transaction Documents, the outstanding shares of Common Stock of the Company, including the Securities to be purchased by the Underwriters from the Company, have been duly authorized and validly issued and are fully paid and non-assessable. None of the outstanding shares of Common Stock of the Company, including the Securities to be purchased by the Underwriters from the Company, were issued in violation of the preemptive or other similar rights of any securityholder of the Company.

(xiii) Authorization of Agreement and Transaction Documents . This Agreement has been duly authorized, executed and delivered by the Company. Each of the Transaction Documents to which the Quintana Parties are a party have been, or at the Closing Time will be,

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duly authorized by the Quintana Parties and, when duly executed and delivered in accordance with its terms by each of the other parties thereto, will constitute a valid and legally binding agreement of each of the Quintana Parties enforceable against the Quintana Parties in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally or by equitable principles relating to enforceability.

(xiv) Authorization of Transactions . The Company has all requisite power and authority to execute and deliver this Agreement and perform its obligations hereunder. Each of the Quintana Parties has all requisite power and authority to execute and deliver each Transaction Document to which it is a party and perform its respective obligations thereunder. The Company has all requisite corporate power and authority to issue, sell and deliver the Securities, in accordance with and upon the terms and conditions set forth in this Agreement, the Certificate of Incorporation, the Bylaws, the Registration Statement, the General Disclosure Package and the Prospectus. At the Closing Time and each Date of Delivery, all limited partnership, limited liability company or corporate action, as the case may be, required to be taken by the Quintana Parties or any of their partners, members or stockholders for the authorization, issuance, sale and delivery of the Securities and the Common Units, the execution and delivery by the Quintana Parties of each Transaction Document to which they are a party and the consummation of the transactions (including the Transactions) contemplated by this Agreement and the Transaction Documents shall have been validly taken.

(xv) Authorization and Description of Securities . The Securities to be purchased by the Underwriters from the Company have been duly authorized for issuance and sale to the Underwriters pursuant to this Agreement and, when issued and delivered by the Company pursuant to this Agreement against payment of the consideration set forth herein, will be validly issued and fully paid and non-assessable; and the issuance of the Securities is not subject to the preemptive or other similar rights of any securityholder of the Company. The Common Stock conforms to all statements relating thereto contained in the Registration Statement, the General Disclosure Package and the Prospectus and such description conforms to the rights set forth in the instruments defining the same. No holder of Securities will be subject to personal liability by reason of being such a holder.

(xvi) No Preemptive or Registration Rights . As of the completion of the Transactions contemplated by the Transaction Documents, except as contained in the Certificate of Incorporation or the Bylaws or described in the Registration Statement, the General Disclosure Package and the Prospectus, there are no (A) preemptive rights or other rights to subscribe for or to purchase, nor any restriction upon the voting or transfer of, any equity securities of the Company or its subsidiaries or (B) outstanding options or warrants to purchase any securities of the Company or its subsidiaries. As of the completion of the Transactions contemplated by the Transaction Documents, except as disclosed in the Registration Statement, there are no persons with registration rights or other similar rights to have any securities registered for sale pursuant to the Registration Statement or otherwise registered for sale or sold by the Company under the 1933 Act pursuant to this Agreement, other than those rights that have been disclosed in the Registration Statement, the General Disclosure Package and the Prospectus and have been waived, if applicable.

(xvii) Absence of Violations and Defaults . Neither the Company nor any of its subsidiaries is (A) in violation of its charter, by-laws or similar organizational document, (B) in default in the performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease

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or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which it or any of them may be bound or to which any of the properties or assets of the Company or any subsidiary is subject (collectively, “Agreements and Instruments”), except for such defaults that would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect, (C) in violation of any law, statute, rule, regulation, judgment, order, writ or decree of any arbitrator, court, governmental body, regulatory body, administrative agency or other authority, body or agency having jurisdiction over the Company or any of its subsidiaries or any of their respective properties, assets or operations (each, a “Governmental Entity”), except for such violations that would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect or (D) in violation, breach or default of any Transaction Documents to which it is a party, except for such violations that would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect.

(xviii) No Conflicts . None of (A) the offering, issuance or sale by the Company of the Securities, (B) the execution, delivery and performance of this Agreement or the Transaction Documents and the consummation of any transactions contemplated by this Agreement, the Transaction Documents, the Registration Statement, the General Disclosure Package or the Prospectus or (C) the application of the proceeds as described under the caption “Use of Proceeds” in the Registration Statement, the General Disclosure Package and the Prospectus (1) conflicts or will conflict with or constitutes or will constitute a violation of the limited partnership agreement, limited liability company agreement, certificate of formation, certificate of incorporation, bylaws or other similar organizational documents of either of the Quintana Parties or any of the Company’s subsidiaries, (2) conflicts or will conflict with or constitutes or will constitute a breach, violation, default or Repayment Event (as defined below) (or an event that, with notice or lapse of time or both, would constitute such a breach, violation, default or Repayment Event) under any of the Agreements and Instruments, (3) violates or will violate any law, statute, rule, regulation, judgment, order, writ or decree of any Governmental Entity or (4) except as contemplated in the New Credit Facility, results or will result in the creation or imposition of any Lien upon any property or assets of any of the Quintana Parties or any of the Company’s subsidiaries except, in the case of clauses (2), (3) and (4), where such breaches, violations, defaults or Liens would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect or would materially impair the ability of the Quintana Parties to consummate any other transactions contemplated by this Agreement or the Transaction Documents. As used herein, a “Repayment Event” means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any of its subsidiaries.

(xix) Absence of Labor Dispute . No labor dispute with the employees of the Company or any of its subsidiaries exists or, to the knowledge of the Company, is imminent, and the Company is not aware of any existing or imminent labor disturbance by the employees of any of its or any subsidiary’s principal suppliers, manufacturers, customers or contractors, which, in either case, would reasonably be expected to result in a Material Adverse Effect.

(xx) Absence of Proceedings . Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, there is no action, suit, proceeding, inquiry or investigation before or brought by any Governmental Entity now pending or, to the knowledge of the Company, threatened, against or affecting the Company or any of its subsidiaries, which would, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect, or would, individually or in the aggregate, reasonably be expected to materially and adversely affect their respective properties or assets or the consummation of the transactions

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contemplated in this Agreement or the Transaction Documents or the performance by the Company of its obligations hereunder; and the aggregate of all pending legal or governmental proceedings to which the Company or any such subsidiary is a party or of which any of their respective properties or assets is the subject which are not described in the Registration Statement, the General Disclosure Package and the Prospectus, including ordinary routine litigation incidental to the business, would not reasonably be expected to result in a Material Adverse Effect.

(xxi) Accuracy of Exhibits . There are no contracts or documents which are required to be described in the Registration Statement, the General Disclosure Package or the Prospectus or to be filed as exhibits to the Registration Statement which have not been so described or filed as required. The statements made in the Registration Statement, the General Disclosure Package and the Prospectus, insofar as they purport to constitute summaries of the terms of the contracts and other documents described and, if applicable, filed, constitute accurate summaries of the terms of such contracts and documents in all material respects.

(xxii) Absence of Further Requirements . No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of, any Governmental Entity is necessary or required for the performance by the Company of its obligations hereunder, in connection with the offering, issuance or sale of the Securities hereunder or the consummation of the transactions contemplated by this Agreement or the Transaction Documents, except (A) such as have been already obtained or as may be required under the 1933 Act, the 1933 Act Regulations, the rules of the New York Stock Exchange (the “NYSE”), state securities laws or the rules of FINRA, (B) such as have been obtained under the laws and regulations of jurisdictions outside the United States in which the Reserved Securities were offered and (C) for any such filing, authorization, approval, consent, license, order, registration, qualification or decree that if not obtained, would not reasonably be expected to result in a Material Adverse Effect or prevent or materially hinder or delay the performance of this Agreement or the consummation of any of the transactions contemplated hereby.

(xxiii) Possession of Licenses and Permits . At the Closing Time and each Date of Delivery, the Company and its subsidiaries will possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate Governmental Entities or the rights of use related thereto necessary to conduct the business now operated by them, except where the failure so to possess would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect. At the Closing Time and each Date of Delivery, the Company and its subsidiaries will be in compliance with the terms and conditions of all Governmental Licenses, except where the failure so to comply would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect. At the Closing Time and each Date of Delivery, all of the Governmental Licenses will be valid and in full force and effect, except when the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any Governmental Licenses which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would reasonably be expected to result in a Material Adverse Effect.

(xxiv) Title to Property . At the Closing Time and each Date of Delivery, the Company and its subsidiaries have good and marketable title to all real property owned by them and good title to all other properties owned by them (the “Partnership Properties”), in each case, free and clear of all mortgages, pledges, liens, security interests, claims, restrictions or encumbrances of

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any kind (“Liens”) except such as (A) are described in the Registration Statement, the General Disclosure Package and the Prospectus, (B) do not, singly or in the aggregate, materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company or any of its subsidiaries, (C) secure indebtedness under the Existing Credit Facilities or those that will secure indebtedness under the New Credit Facility or (D) would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect; and all of the leases and subleases material to the business of the Company and its subsidiaries, considered as one enterprise, and under which the Company or any of its subsidiaries holds properties described in the Registration Statement, the General Disclosure Package or the Prospectus, are in full force and effect, except as would not reasonably be expected to result in a Material Adverse Effect, and neither the Company nor any such subsidiary has any notice of any material claim of any sort that has been asserted by anyone adverse to the rights of the Company or any subsidiary under any of the leases or subleases mentioned above, or affecting or questioning the rights of the Company or such subsidiary to the continued possession of the leased or subleased premises under any such lease or sublease, except as would not reasonably be expected to result in a Material Adverse Effect.

(xxv) Possession of Intellectual Property . The Company and its subsidiaries own or possess, or can acquire on reasonable terms, adequate patents, patent rights, licenses, inventions, copyrights, know how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks, trade names or other intellectual property (collectively, “Intellectual Property”) necessary to carry on the business now operated or currently contemplated by them, and neither the Company nor any of its subsidiaries has received any notice or is otherwise aware of any infringement of, misappropriation of or conflict with asserted rights of others with respect to any Intellectual Property or of any facts or circumstances that would render any Intellectual Property invalid or inadequate to protect the interest of the Company or any of its subsidiaries therein, and which infringement or conflict (if the subject of any unfavorable decision, ruling or finding) or invalidity or inadequacy, singly or in the aggregate, would result in a Material Adverse Effect. All material technical information developed by and belonging to the Company or its subsidiaries that has not been patented has been kept confidential and, to the knowledge of the Company, there is no infringement or misappropriation by third parties of any Intellectual Property.

(xxvi) Certain Relationships and Related Party Transactions . No relationship, direct or indirect, exists between or among the Company or any of its subsidiaries, on the one hand, and the directors, officers, stockholders, affiliates, customers or suppliers of the Company or any of its subsidiaries, on the other hand, that is required to be described in the Registration Statement, the General Disclosure Package and the Prospectus and is not so described.

(xxvii) ERISA . Except as could not reasonably be expected to result in a Material Adverse Effect, (A) each “employee benefit plan” (as defined in Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”)) with respect to which the Company or its subsidiaries has or could reasonably be expected to have any liability (each, a “Plan”) has been maintained and operated at all times in accordance in all respects with its terms and in compliance in all respects with all applicable provisions of ERISA, the Internal Revenue Code of 1986, as amended (the “Code”) and all other applicable laws; (B) no “reportable event” (as defined in Section 4043(c) of ERISA) has occurred with respect to Plan subject to Title IV of ERISA with respect to which the Company or any of its subsidiaries could reasonably be expected to have any liability, excluding any reportable event for which a waiver would apply; (C) neither the Company nor any of its subsidiaries has incurred, nor could any such entity reasonably be expected to incur, liability with respect to any Plan under (1) Section 302 or Title

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IV of ERISA or (2) Sections 412 or 4971 of the Code; (D) each Plan that is intended to be qualified under Section 401(a) of the Code is so qualified, is the subject of a favorable determination, advisory or opinion letter from the Internal Revenue Service to the effect that it is so qualified and, nothing has occurred, whether by action or by failure to act, which could reasonably be expected to cause the loss of such qualification; (E) neither the Company nor any of its subsidiaries has incurred any unpaid liability to the Pension Benefit Guaranty Corporation in respect of a Plan (other than for payment of premiums pursuant to Section 4007 of ERISA in the ordinary course of business); (F) the fair market value of the assets under each Plan subject to Title IV of ERISA or Section 412 of the Code exceeds the present value of all benefits accrued under such Plan (determined on an ongoing basis based on those assumptions used to fund such Plan); (G) no non-exempt “prohibited transaction” pursuant to Section 406 of ERISA or Section 4975 of the Code has occurred with respect to any Plan; and (H) none of the Company or its subsidiaries provides or is required to provide retiree or post-employment health benefits to any person except as required by Section 4980B of the Code or Part 6 of Subtitle B of Title I of ERISA.

(xxviii) Environmental Laws . Except as described in the Registration Statement, the General Disclosure Package and the Prospectus or would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect, (A) the Company and all of its subsidiaries are in compliance with all applicable federal, state and local statutes, laws, rules (including fundamental principles of common law), regulations, ordinances, codes or policies, or any judicial or administrative interpretations thereof, including any judicial or administrative orders, consents, decrees or judgments, relating to pollution or protection of human health (to the extent relating to exposure to Hazardous Materials, as defined below), the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including, without limitation, laws and regulations relating to the release or threatened release of, or human exposure to, pollutants, contaminants, solid or hazardous wastes, toxic substances, hazardous substances or chemicals, petroleum or petroleum products or asbestos-containing materials (collectively, “Hazardous Materials”), or to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials (collectively, “Environmental Laws”), (B) the Company and its subsidiaries have received or timely applied for all permits, authorizations and approvals required under any applicable Environmental Laws and are each in compliance with the terms and conditions of all such received permits, authorizations and approvals, (C) there has been no release of Hazardous Materials at any of the properties of the Company or any of its subsidiaries that requires any clean-up or remediation pursuant to Environmental Law, (D) neither the Company nor any of its subsidiaries is conducting or funding any investigation, clean-up or remediation of any release of Hazardous Materials at any property, (E) there are no pending or threatened administrative, regulatory or judicial actions, suits, demands, demand letters, claims, Liens, notices of noncompliance or violation, investigations or proceedings relating to any Environmental Law against the Company or any of its subsidiaries and (F) there are no events or circumstances that would reasonably be expected to form the basis of an order for clean-up or remediation, or an action, suit or proceeding by any private party or Governmental Entity, against or affecting the Company or any of its subsidiaries relating to Hazardous Materials or arising under any Environmental Laws.

(xxix) Accounting Controls . The Company and each of its subsidiaries maintain effective internal control over financial reporting (as defined under Rule 13-a15 and 15d-15 under the 1934 Act Regulations) and a system of internal accounting controls sufficient to provide reasonable assurances that (A) transactions are executed in accordance with management’s general or specific authorization; (B) transactions are recorded as necessary to permit preparation

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of financial statements in conformity with GAAP and to maintain accountability for assets; (C) access to assets is permitted only in accordance with management’s general or specific authorization; and (D) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences. Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, since the end of the Company’s most recent audited fiscal year, there has been (1) no material weakness in the Company’s internal control over financial reporting (whether or not remediated) and (2) no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting. The Company’s auditors have been advised of: (i) all significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which have adversely affected or are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial information; and (ii) any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal controls over financial reporting.

(xxx) Disclosure Controls . To the extent required by Rule 13a-15 under the 1934 Act, the Company has established and maintains “disclosure controls and procedures” (as is defined in Rule 13a-15(e) under the 1934 Act); and (A) such disclosure controls and procedures are designed to ensure that the information required to be disclosed by the Company in the reports it files or will file or submit under the 1934 Act, as applicable, is accumulated and communicated to management, including its principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure to be made and (B) to the extent required by Rule 13a-15 under the 1934 Act, such disclosure controls and procedures are effective in all material respects to perform the functions for which they were established.

(xxxi) Compliance with the Sarbanes-Oxley Act . The Company and each of its subsidiaries has taken all necessary actions to ensure that, upon the effectiveness of the Registration Statement, the Company and all of its subsidiaries will be in compliance with all provisions of the Sarbanes-Oxley Act of 2002 and all rules and regulations promulgated thereunder or implementing the provisions thereof (the “Sarbanes-Oxley Act”) that are then in effect and with which the Company and its subsidiaries is required to comply as of the effectiveness of the Registration Statement.

(xxxii) Transfer Taxes . There are no transfer taxes or other similar fees or charges under federal law or the laws of any state, or any political subdivision thereof, required to be paid in connection with the execution and delivery of this Agreement or the issuance by the Company or the sale by the Company of the Securities.

(xxxiii) Payment of Taxes . All United States federal income tax returns of the Company and its subsidiaries required by law to be filed have been filed and all taxes shown by such returns or otherwise assessed, which are due and payable, have been paid, except assessments against which appeals have been or will be promptly taken and as to which adequate reserves have been provided, except as would not reasonably be expected to result in a Material Adverse Effect. The United States federal income tax returns of the Company through the fiscal year ended December 31, 2016 have been settled and no assessment in connection therewith has been made against the Company. The Company and its subsidiaries have filed all other tax returns that are required to have been filed by them pursuant to applicable foreign, state, local or other law except insofar as the failure to file such returns would not reasonably be expected to result in a Material Adverse Effect, and has paid all taxes due pursuant to such returns or pursuant to any assessment received by the Company and its subsidiaries, except for such taxes, if any, as are being contested in good

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faith and as to which adequate reserves have been established by the Company and its subsidiaries. The charges, accruals and reserves on the books of the Company and its subsidiaries in respect of any income and tax liability for any years not finally determined are adequate to meet any assessments or re-assessments for additional income tax for any years not finally determined, except to the extent of any inadequacy that would not reasonably be expected to result in a Material Adverse Effect.

(xxxiv) Insurance . The Company and its subsidiaries carry or are entitled to the benefits of insurance, with financially sound and reputable insurers, in such amounts and covering such risks as is generally maintained by companies of established repute engaged in the same or similar business and owning similar properties in localities where the Company or the applicable subsidiary operates, and all such insurance is in full force and effect. The Company and its subsidiaries are in compliance with the terms of such insurance and there are no material claims by the Company or any of its subsidiaries under such insurance as to which any insurance company is denying liability or defending under a reservation of rights clause. The Company has no reason to believe that it or any of its subsidiaries will not be able (A) to renew its existing insurance coverage as and when such policies expire or (B) to obtain comparable coverage from similar institutions as may be necessary or appropriate to the conduct of its business as now conducted and at a cost that would not reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any of its subsidiaries have been denied any insurance coverage which it has sought or for which it has applied.

(xxxv) Investment Company Act . Neither the Company nor any of its subsidiaries is now, and after the offering, issuance and sale of the Securities to be sold by the Company pursuant to this Agreement and the application of the net proceeds therefrom as described in the Registration Statement, the General Disclosure Package and the Prospectus, neither the Company nor any of its subsidiaries will be an “investment company” within the meaning of the Investment Company Act of 1940, as amended (the “1940 Act”).

(xxxvi) Absence of Manipulation . Neither the Company nor any affiliate of the Company has taken, nor will the Company or any affiliate take, directly or indirectly, any action which is designed, or would be expected, to cause or result in, or which constitutes, the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities or to result in a violation of Regulation M under the 1934 Act.

(xxxvii) Anti-Bribery/Anti-Corruption Laws . None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its subsidiaries is aware of or has (i) used any Company funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment from funds of the Company or any of its subsidiaries to any foreign or domestic government official or employee, including of any government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office; (iii) taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), any applicable law or regulation implementing the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions, the United Kingdom Bribery Act 2010, or any other applicable comparable law (collectively, the “Anti-Corruption Laws”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or

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authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the Anti-Corruption Laws and the Company and its subsidiaries and, to the knowledge of the Company, its affiliates have conducted and will conduct their businesses in compliance with the Anti-Corruption Laws and have instituted and maintained and will continue to institute and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith. Neither the Company nor its subsidiaries will use, directly or indirectly, the proceeds of the offering in furtherance of an offer, payment, promise to pay, or authorization of the payment or giving of money, or anything else of value, to any person in violation of the Anti-Corruption Laws; or (iv) offered or requested any unlawful bribe or other unlawful benefit, including, without limitation, any unlawful rebate, payoff, influence payment or kickback.

(xxxviii) Money Laundering Laws . The operations of the Company and each of its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any Governmental Entity (collectively, the “Money Laundering Laws”); and no action, suit or proceeding by or before any Governmental Entity involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the best knowledge of the Company, threatened.

(xxxix) OFAC . Neither the Company, nor any of its subsidiaries, any of their respective directors or officers or, to the knowledge of the Company, any agent, employee, affiliate or representative of the Company or any of its subsidiaries is an individual or entity (“Person”), or is owned or controlled by one or more persons, currently or in the past five years, the subject or target of any sanctions administered or enforced by the United States Government, including, without limitation, the U.S. Department of the Treasury’s Office of Foreign Assets Control (“OFAC”), the United Nations Security Council, the European Union, Her Majesty’s Treasury, or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company or any of its subsidiaries located, organized or resident in a country or territory that is the subject of Sanctions, including, without limitation, Cuba, Burma (Myanmar), Iran, North Korea, Sudan and Syria (each, a “Sanctioned Country”); and the Company and each of its subsidiaries will not directly or indirectly use the proceeds of the sale of the Securities, or lend, contribute or otherwise make available such proceeds to any subsidiaries, joint venture partners or other Person, to (i) fund any activities of or business with any Person in any Sanctioned Country or (ii) in any other manner that will result in a violation by any Person (including any Person participating in the transaction, whether as underwriter, advisor, investor or otherwise) of Sanctions.

(xl) Sales of Reserved Securities . In connection with any offer and sale of Reserved Securities outside the United States, each preliminary prospectus, the Prospectus and any amendment or supplement thereto, at the time it was distributed, complied and will comply in all material respects with any applicable laws or regulations of foreign jurisdictions in which the same is distributed. The Company has not offered, or caused the Representatives to offer, Reserved Securities to any person with the specific intent to unlawfully influence (i) a customer or supplier of the Company or any of its affiliates to alter the customer’s or supplier’s level or type of business with any such entity or (ii) a trade journalist or publication to write or publish favorable information about the Company or any of its affiliates, or their respective businesses or products.

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(xli) Lending Relationship . Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company (i) does not have any material lending or other relationship with any bank or lending affiliate of any Underwriter and (ii) does not intend to use any of the proceeds from the sale of the Securities to repay any outstanding debt owed to any affiliate of any Underwriter.

(xlii) Statistical and Market-Related Data . Any statistical and market-related data included in the Registration Statement, the General Disclosure Package or the Prospectus are based on or derived from sources that the Company believes, after reasonable inquiry, to be reliable and accurate and, to the extent required, the Company has obtained the written consent to the use of such data from such sources.

(xliii) Offering Materials . Neither the Company nor any of its subsidiaries has distributed and, prior to the later to occur of the Closing Time or any Date of Delivery and completion of the distribution of the Securities, will distribute any offering material in connection with the offering and sale of the Securities other than any preliminary prospectus, the Prospectus, any Issuer Free Writing Prospectus to which the Representatives have consented in accordance with this Agreement and any other materials, if any, permitted by the 1933 Act, including Rule 134.

(xliv) NYSE Listing . The Securities have been approved to be listed on the NYSE, subject only to official notice of issuance.

(xlv) FINRA . To the knowledge of the Company, there are no affiliations or associations between any participating member of FINRA and any of the Company’s officers or directors or the Company’s 5% or greater security holders, except as described in the Registration Statement, the General Disclosure Package and the Prospectus.

(b) Officer’s Certificates . Any certificate signed by any officer of the Company or any of its subsidiaries delivered to the Representatives or to counsel for the Underwriters shall be deemed a representation and warranty by the Company to each Underwriter as to the matters covered thereby.

SECTION 2. Sale and Delivery to Underwriters; Closing .

(a) Initial Securities . On the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company agrees to sell to each Underwriter, severally and not jointly, and each Underwriter, severally and not jointly, agrees to purchase from the Company, at the price per share set forth in Schedule A the number of Initial Securities set forth in Schedule A opposite the name of such Underwriter, plus any additional number of Initial Securities which such Underwriter may become obligated to purchase pursuant to the provisions of Section  10 hereof subject, in each case, to such adjustments among the Underwriters as the Representatives in their sole discretion shall make to eliminate any sales or purchases of fractional shares.

(b) Option Securities . In addition, on the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company hereby grants an option to the Underwriters, severally and not jointly, to purchase up to an additional 1,388,889 Option Securities, at the price per share set forth in Schedule A , less an amount per share equal to any dividends or distributions declared by the Company and payable on the Initial Securities but not payable on the Option Securities. The option hereby granted may be exercised for 30 days after the date hereof and may be exercised in whole or in part at any time from time to time upon notice by the Representatives to the Company setting forth the number of Option Securities as to which the several Underwriters are then

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exercising the option and the time and date of payment and delivery for such Option Securities. Any such time and date of delivery (a “Date of Delivery”) shall be determined by the Representatives, but shall not be later than seven full business days after the exercise of said option, nor in any event prior to the Closing Time. If the option is exercised as to all or any portion of the Option Securities, each of the Underwriters, acting severally and not jointly, will purchase that proportion of the total number of Option Securities then being purchased which the number of Initial Securities set forth in Schedule A opposite the name of such Underwriter bears to the total number of Initial Securities, subject, in each case, to such adjustments as the Representatives in their sole discretion shall make to eliminate any sales or purchases of fractional shares.

(c) Payment . Payment of the purchase price for, and delivery of, the Initial Securities shall be made at the offices of Andrews Kurth Kenyon LLP, 600 Travis Street, Suite 4200, Houston, Texas 77002, or at such other place as shall be agreed upon by the Representatives and the Company, at 9:00 A.M. (New York City time) on the second (third, if the pricing occurs after 4:30 P.M. (New York City time) on any given day) business day after the date hereof (unless postponed in accordance with the provisions of Section  10 ), or such other time not later than ten business days after such date as shall be agreed upon by the Representatives and the Company (such time and date of payment and delivery being herein called “Closing Time”).

In addition, in the event that any or all of the Option Securities are purchased by the Underwriters, payment of the purchase price for, and delivery of, such Option Securities shall be made at the above mentioned offices, or at such other place as shall be agreed upon by the Representatives and the Company, on each Date of Delivery as specified in the notice from the Representatives to the Company.

Payment shall be made to the Company by wire transfer of immediately available funds to bank account(s) designated by the Company, against delivery to the Representatives for the respective accounts of the Underwriters for the Securities to be purchased by them. It is understood that each Underwriter has authorized the Representatives, for its account, to accept delivery of, receipt for, and make payment of the purchase price for, the Initial Securities and the Option Securities, if any, which it has agreed to purchase. The Representatives, individually and not as representatives of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Initial Securities or the Option Securities, if any, to be purchased by any Underwriter whose funds have not been received by the Closing Time or the relevant Date of Delivery, as the case may be, but such payment shall not relieve such Underwriter from its obligations hereunder.

(d) Appointment of Qualified Independent Underwriter . The Company hereby confirms its engagement of Tudor, Pickering, Holt & Co. Securities, Inc. as, and Tudor, Pickering, Holt & Co. Securities, Inc. hereby confirms its agreement with the Company to render services as, a “qualified independent underwriter” within the meaning of FINRA Rule 2720 (“Rule 2720”) with respect to the offering and sale of the Securities. Tudor, Pickering, Holt & Co. Securities, Inc., solely in its capacity as qualified independent underwriter and not otherwise, is referred to herein as the “QIU.”

SECTION 3. Covenants of the Company . The Company covenants with each Underwriter as follows:

(a) Compliance with Securities Regulations and Commission Requests . The Company, subject to Section  3(b) , will comply with the requirements of Rule 430A, and will notify the Representatives promptly, and confirm the notice in writing, (i) when any post-effective amendment to the Registration Statement shall become effective or any amendment or supplement to the Prospectus shall have been filed, (ii) of the receipt of any comments to the Registration Statement from the Commission, (iii) of any request by the Commission for any amendment to the Registration Statement or

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any amendment or supplement to the Prospectus or for additional information, (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or any post-effective amendment or of any order preventing or suspending the use of any preliminary prospectus or the Prospectus, or of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, or of the initiation or threatening of any proceedings for any of such purposes or of any examination pursuant to Section 8(d) or 8(e) of the 1933 Act concerning the Registration Statement and (v) if the Company becomes the subject of a proceeding under Section 8A of the 1933 Act in connection with the offering of the Securities. The Company will effect all filings required under Rule 424(b), in the manner and within the time period required by Rule 424(b) (without reliance on Rule 424(b)(8)), and will take such steps as it deems necessary to ascertain promptly whether the form of prospectus transmitted for filing under Rule 424(b) was received for filing by the Commission and, in the event that it was not, it will promptly file such prospectus. The Company will make every reasonable effort to prevent the issuance of any stop order, prevention or suspension and, if any such order is issued, to obtain the lifting thereof as soon as practicable.

(b) Continued Compliance with Securities Laws . The Company will comply with the 1933 Act and the 1933 Act Regulations so as to permit the completion of the distribution of the Securities as contemplated in this Agreement and in the Registration Statement, the General Disclosure Package and the Prospectus. If at any time when a prospectus relating to the Securities is (or, but for the exception afforded by Rule 172 of the 1933 Act Regulations (“Rule 172”), would be) required by the 1933 Act to be delivered in connection with sales of the Securities, any event shall occur or condition shall exist as a result of which it is necessary, in the opinion of counsel for the Underwriters or for the Company, to (i) amend the Registration Statement in order that the Registration Statement will not include an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading, (ii) amend or supplement the General Disclosure Package or the Prospectus in order that the General Disclosure Package or the Prospectus, as the case may be, will not include any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein not misleading in the light of the circumstances existing at the time it is delivered to a purchaser or (iii) amend the Registration Statement or amend or supplement the General Disclosure Package or the Prospectus, as the case may be, in order to comply with the requirements of the 1933 Act or the 1933 Act Regulations, the Company will promptly (A) give the Representatives notice of such event, (B) prepare any amendment or supplement as may be necessary to correct such statement or omission or to make the Registration Statement, the General Disclosure Package or the Prospectus comply with such requirements and, a reasonable amount of time prior to any proposed filing or use, furnish the Representatives with copies of any such amendment or supplement and (C) file with the Commission any such amendment or supplement; provided that the Company shall not file or use any such amendment or supplement to which the Representatives or counsel for the Underwriters shall object. The Company will furnish to the Underwriters such number of copies of such amendment or supplement as the Underwriters may reasonably request.

(c) Delivery of Registration Statements . The Company has furnished or will deliver to the Representatives and counsel for the Underwriters, without charge, signed copies of the Registration Statement as originally filed and each amendment thereto (including exhibits filed therewith) and signed copies of all consents and certificates of experts, and will also deliver to the Representatives, upon request, without charge, a conformed copy of the Registration Statement as originally filed and each amendment thereto (without exhibits) for each of the Underwriters. Such copies of the Registration Statement and each amendment thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

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(d) Delivery of Prospectuses . The Company has delivered to each Underwriter, without charge, as many copies of each preliminary prospectus as such Underwriter reasonably requested, and the Company hereby consents to the use of such copies for purposes permitted by the 1933 Act. The Company will furnish to each Underwriter, without charge, during the period when a prospectus relating to the Securities is (or, but for the exception afforded by Rule 172, would be) required to be delivered under the 1933 Act, such number of copies of the Prospectus (as amended or supplemented) as such Underwriter may reasonably request. The Prospectus and any amendments or supplements thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(e) Blue Sky Qualifications . The Company will use its reasonable best efforts, in cooperation with the Underwriters, to qualify the Securities for offering and sale under the applicable securities laws of such states and other jurisdictions (domestic or foreign) as the Representatives may designate and to maintain such qualifications in effect so long as required to complete the distribution of the Securities; provided, however, that the Company shall not be obligated to file any general consent to service of process or to qualify as a foreign corporation or as a dealer in securities in any jurisdiction in which it is not so qualified or to subject itself to taxation in respect of doing business in any jurisdiction in which it is not otherwise so subject.

(f) Rule 158 . The Company will timely file such reports pursuant to the 1934 Act as are necessary in order to make generally available to its securityholders as soon as practicable an earnings statement for the purposes of, and to provide to the Underwriters the benefits contemplated by, the last paragraph of Section 11(a) of the 1933 Act.

(g) Use of Proceeds . The Company will use the net proceeds received by it from the sale of the Securities in the manner specified in the Registration Statement, the General Disclosure Package and the Prospectus under “Use of Proceeds.”

(h) Listing . The Company will use its reasonable best efforts to effect and maintain the listing of the Common Stock (including the Securities) on the NYSE.

(i) Restriction on Sale of Securities . During a period of 180 days from the date of the Prospectus (the “Restricted Period”), the Company will not, without the prior written consent of Merrill Lynch and Piper Jaffray, (i) directly or indirectly, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend or otherwise dispose of or transfer, request or demand that the Company files a registration statement (other than a confidential submission of a draft registration statement with the Commission that is not publicly available until the expiration of the Restricted Period) related to or otherwise transfer or dispose of any shares of Common Stock or Common Units or any securities convertible into or exercisable or exchangeable for shares of Common Stock or Common Units or (ii) enter into any swap or other agreement that transfers, in whole or in part, the economic consequence of ownership of the shares of Common Stock or Common Units, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock, Common Units or other securities, in cash or otherwise. The foregoing sentence shall not apply to (A) the Securities to be sold hereunder, (B) any shares of Common Stock or Common Units issued by the Company upon the exercise of an option or warrant or the conversion of a security outstanding on the date hereof and referred to in the Registration Statement, the General Disclosure Package and the Prospectus, (C) any shares of Common Stock or Common Units issued or options to purchase Common Stock or Common Units granted pursuant to existing employee benefit plans of the Company referred to in the Registration Statement, the General Disclosure Package and the Prospectus, including, for the avoidance of doubt, the Company’s 2017 Long-Term Incentive Plan, (D) any shares of Common Stock or Common Units issued pursuant to any non-

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employee director stock plan or dividend reinvestment plan referred to in the Registration Statement, the General Disclosure Package and the Prospectus, (E) any shares of Common Stock or Common Units or any securities convertible to or exchangeable for or repayable with shares of Common Stock or Common Units issued in connection with an acquisition, business combination or joint venture, provided that the aggregate number of shares of Common Stock or Common Units issued for such purposes during the 180 days after the date of the Prospectus shall not exceed 5% of the total number of shares of Common Stock issued and outstanding at the Closing Time, and provided further, that the Company causes each recipient of such shares of Common Stock or Common Units to execute and deliver a lock-up agreement as described in Section 5(i) hereof or (F) the transactions contemplated by the Reorganization Agreement.

(j) Lock-Up Waiver Press Release . If Merrill Lynch and Piper Jaffray, in their sole discretion, agree to release or waive the restrictions set forth in a lock-up agreement described in Section 5(i) hereof for an officer or director of the Company and provide the Company with notice of the impending release or waiver at least three business days before the effective date of the release or waiver, then the Company agrees to announce the impending release or waiver by a press release substantially in the form of Exhibit C hereto through a major news service at least two business days before the effective date of the release or waiver.

(k) Reporting Requirements . The Company, during the period when a Prospectus relating to the Securities is (or, but for the exception afforded by Rule 172, would be) required to be delivered under the 1933 Act, will file all documents required to be filed with the Commission pursuant to the 1934 Act within the time periods required by the 1934 Act and 1934 Act Regulations. Additionally, the Company shall report the use of proceeds from the issuance of the Securities as may be required under Rule 463 under the 1933 Act.

(l) Issuer Free Writing Prospectuses . The Company agrees that, unless it obtains the prior written consent of the Representatives, it will not make any offer relating to the Securities that would constitute an Issuer Free Writing Prospectus or that would otherwise constitute a “free writing prospectus,” or a portion thereof, required to be filed by the Company with the Commission or retained by the Company under Rule 433; provided that the Representatives will be deemed to have consented to the Issuer Free Writing Prospectuses listed on Schedule B-2 hereto and any “road show that is a written communication” within the meaning of Rule 433(d)(8)(i) that has been reviewed by the Representatives. The Company represents that it has treated or agrees that it will treat each such free writing prospectus consented to, or deemed consented to, by the Representatives as an “issuer free writing prospectus,” as defined in Rule 433, and that it has complied and will comply with the applicable requirements of Rule 433 with respect thereto, including timely filing with the Commission where required, legending and record keeping. If at any time following issuance of an Issuer Free Writing Prospectus there occurred or occurs an event or development as a result of which such Issuer Free Writing Prospectus conflicted or would conflict with the information contained in the Registration Statement, any preliminary prospectus or the Prospectus or included or would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances existing at that subsequent time, not misleading, the Company will promptly notify the Representatives and will promptly amend or supplement, at its own expense, such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission.

(m) Compliance with FINRA Rules . The Company hereby agrees that it will ensure that the Reserved Securities will be restricted as required by FINRA or the FINRA rules from sale, transfer, assignment, pledge or hypothecation for a period of three months following the date of this Agreement. The Underwriters will notify the Company as to which persons will need to be so restricted. At the request of the Underwriters, the Company will direct the transfer agent to place a stop transfer restriction upon such securities for such period of time. Should the Company release, or seek to release, from such restrictions any of the Reserved Securities, the Company agrees to reimburse the Underwriters for any reasonable expenses (including, without limitation, legal expenses) they incur in connection with such release.

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(n) Testing-the-Waters Materials . If at any time following the distribution of any Written Testing-the-Waters Communication there occurred or occurs an event or development as a result of which such Written Testing-the-Waters Communication included or would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances existing at that subsequent time, not misleading, the Company will promptly notify the Representatives and will promptly amend or supplement, at its own expense, such Written Testing-the-Waters Communication to eliminate or correct such untrue statement or omission.

(o) Emerging Growth Company Status . The Company will promptly notify the Representatives if the Company ceases to be an Emerging Growth Company at any time prior to the later of (i) completion of the distribution of the Securities within the meaning of the 1933 Act and (ii) completion of the Restricted Period.

SECTION 4. Payment of Expenses .

(a) Expenses . The Company will pay or cause to be paid all expenses incident to the performance of its obligations under this Agreement, including (i) the preparation, printing and filing of the Registration Statement (including financial statements and exhibits) as originally filed and each amendment thereto, (ii) the preparation, printing and delivery to the Underwriters of copies of each preliminary prospectus, each Issuer Free Writing Prospectus and the Prospectus and any amendments or supplements thereto and any costs associated with electronic delivery of any of the foregoing by the Underwriters to investors, (iii) the preparation, issuance and delivery of the certificates for the Securities to the Underwriters, including any stock or other transfer taxes and any stamp or other duties payable upon the sale, issuance or delivery of the Securities to the Underwriters, if any, (iv) the fees and disbursements of the Company’s counsel, accountants and other advisors, (v) the qualification of the Securities under securities laws in accordance with the provisions of Section 3(e) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriters in connection therewith and in connection with the preparation of the Blue Sky Memorandum and any supplement thereto, (vi) the fees and expenses of any transfer agent or registrar for the Securities, (vii) the costs and expenses of the Company relating to investor presentations on any “road show” undertaken in connection with the marketing of the Securities, including without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged in connection with the road show presentations, travel and lodging expenses of the representatives and officers of the Company and any such consultants (for the avoidance of doubt, travel and lodging expenses of the Underwriters shall be paid by the Underwriters), and 50% of the cost of aircraft and other transportation chartered in connection with the road show (and the Underwriters shall pay 50% of the cost of such aircraft or other transportation chartered in connection with the road show), (viii) the filing fees incident to, and the reasonable fees and disbursements of counsel to the Underwriters in connection with, the review by FINRA of the terms of the sale of the Securities (such fees and disbursements of counsel not to exceed $22,500), (ix) the fees and expenses incurred in connection with the listing of the Securities on the NYSE and (x) the costs and expenses (including, without limitation, any damages or other amounts payable in connection with legal or contractual liability) associated with the reforming of any contracts for sale of the Securities made by the Underwriters caused by a breach of the representation contained in the third sentence of Section  1(a)(ii) , (xi) all costs and expenses of the Underwriters, including the fees and disbursements of counsel for the Underwriters, in connection with matters related to the Reserved Securities which are designated by the Company for sale to Invitees and (xii) the fees and expenses of the QIU.

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(b) Termination of Agreement . If this Agreement is terminated by the Representatives in accordance with the provisions of Section  5 , Section  9(a)(i) or (iii) , Section  10 (but only with respect to non-defaulting Underwriters) or Section  11 hereof, the Company shall reimburse the Underwriters for all of their reasonable, documented out of pocket expenses, including the reasonable fees and disbursements of counsel for the Underwriters.

SECTION 5. Conditions of Underwriters ’ Obligations . The obligations of the several Underwriters hereunder are subject to the accuracy of the representations and warranties of the Company contained herein or in certificates of any officer of the Company or any of its subsidiaries delivered pursuant to the provisions hereof, to the performance by the Company of its covenants and other obligations hereunder, and to the following further conditions:

(a) Effectiveness of Registration Statement; Rule 430A Information . The Registration Statement, including any Rule 462(b) Registration Statement, has become effective and, at the Closing Time, no stop order suspending the effectiveness of the Registration Statement or any post-effective amendment thereto has been issued under the 1933 Act, no order preventing or suspending the use of any preliminary prospectus or the Prospectus has been issued and no proceedings for any of those purposes have been instituted or are pending or, to the Company’s knowledge, contemplated; and the Company has complied with each request (if any) from the Commission for additional information. A prospectus containing the Rule 430A Information shall have been filed with the Commission in the manner and within the time frame required by Rule 424(b) without reliance on Rule 424(b)(8) or a post-effective amendment providing such information shall have been filed with, and declared effective by, the Commission in accordance with the requirements of Rule 430A.

(b) Opinion of Counsel for Company . At the Closing Time, the Representatives shall have received the opinions, dated the Closing Time, of Vinson & Elkins L.L.P. and McAfee & Taft A Professional Corporation, counsel for the Company, in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters collectively to the effect set forth in Exhibit A hereto.

(c) Opinion of Counsel for Underwriters . At the Closing Time, the Representatives shall have received the opinion, dated the Closing Time, of Andrews Kurth Kenyon LLP, counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters. Such counsel may state that, insofar as such opinion involves factual matters, they have relied, to the extent they deem proper, upon certificates of officers and other representatives of the Company and its subsidiaries and certificates of public officials.

(d) Officers ’ Certificate . At the Closing Time, there shall not have been, since the date hereof or since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, any material adverse change in the condition, financial or otherwise, or in the earnings, management, business affairs or business prospects of the Company and its subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business, and the Representatives shall have received a certificate of the Chief Executive Officer or the President of the Company and of the chief financial or chief accounting officer of the Company, dated the Closing Time, to the effect that (i) there has been no such material adverse change, (ii) the representations and warranties of the Company in this Agreement are true and correct with the same force and effect as though expressly made at and as of the Closing Time, (iii) the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied at or prior to the Closing Time, and (iv) no stop order suspending the effectiveness of the Registration Statement under the 1933 Act has been issued, no order preventing or suspending the use of any preliminary prospectus or the Prospectus has been issued and no proceedings for any of those purposes have been instituted or are pending or, to their knowledge, contemplated.

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(e) Accountant ’ s Comfort Letters . At the time of the execution of this Agreement, the Representatives shall have received from PricewaterhouseCoopers LLP letters, each dated such date, in form and substance satisfactory to the Representatives, together with signed or reproduced copies of such letters for each of the other Underwriters containing statements and information of the type ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained in the Registration Statement, the General Disclosure Package and the Prospectus.

(f) Bring-down Comfort Letters . At the Closing Time, the Representatives shall have received from PricewaterhouseCoopers LLP letters, each dated as of the Closing Time, to the effect that they reaffirm the statements made in the letter furnished pursuant to subsection (e) of this Section, except that the specified date referred to shall be a date not more than three business days prior to the Closing Time.

(g) Approval of Listing . At the Closing Time, the Securities shall have been approved for listing on the NYSE, subject only to official notice of issuance.

(h) No Objection . FINRA has confirmed that it has not raised any objection with respect to the fairness and reasonableness of the underwriting terms and arrangements relating to the offering of the Securities.

(i) Lock-up Agreements . At the date of this Agreement, the Representatives shall have received an agreement substantially in the form of Exhibit B hereto signed by the persons listed on Schedule C hereto.

(l) Rating of Securities . Neither the Company nor its subsidiaries have any debt securities or preferred stock that are rated by any “nationally recognized statistical rating agency” (as defined in Section 3(a)(62) of the 1934 Act).

(m) Conditions to Purchase of Option Securities . In the event that the Underwriters exercise their option provided in Section  2(b) hereof to purchase all or any portion of the Option Securities, the representations and warranties of the Company contained herein and the statements in any certificates furnished by the Company and any of its subsidiaries hereunder shall be true and correct as of each Date of Delivery and, at the relevant Date of Delivery, the Representatives shall have received:

(i) Officers ’ Certificate . A certificate, dated such Date of Delivery, of the President or a Vice President of the Company and of the chief financial or chief accounting officer of the Company confirming that the certificate delivered at the Closing Time pursuant to Section  5(d) hereof remains true and correct as of such Date of Delivery.

(ii) Opinion of Counsel for Company . If requested by the Representatives, the opinions of Vinson & Elkins L.L.P. and McAfee & Taft A Professional Corporation, counsel for the Company, in form and substance satisfactory to counsel for the Underwriters, dated such Date of Delivery, relating to the Option Securities to be purchased on such Date of Delivery and otherwise collectively to the same effect as the opinion required by Section  5(b) hereof.

(iii) Opinion of Counsel for Underwriters . If requested by the Representatives, the opinion of Andrews Kurth Kenyon LLP, counsel for the Underwriters, dated such Date of Delivery, relating to the Option Securities to be purchased on such Date of Delivery and otherwise to the same effect as the opinion required by Section  5(c) hereof.

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(iv) Bring-down Comfort Letter . If requested by the Representatives, a letter from PricewaterhouseCoopers LLP, in form and substance satisfactory to the Representatives and dated such Date of Delivery, substantially in the same form and substance as the letter furnished to the Representatives pursuant to Section  5(f) hereof, except that the “specified date” in the letter furnished pursuant to this paragraph shall be a date not more than three business days prior to such Date of Delivery.

(n) Additional Documents . At the Closing Time and at each Date of Delivery (if any) counsel for the Underwriters shall have been furnished with such documents and opinions as they may require for the purpose of enabling them to pass upon the issuance and sale of the Securities as herein contemplated, or in order to evidence the accuracy of any of the representations or warranties, or the fulfillment of any of the conditions, herein contained; and all proceedings taken by the Company in connection with the issuance and sale of the Securities as herein contemplated shall be satisfactory in form and substance to the Representatives and counsel for the Underwriters.

(o) Termination of Agreement . If any condition specified in this Section shall not have been fulfilled when and as required to be fulfilled, this Agreement, or, in the case of any condition to the purchase of Option Securities on a Date of Delivery which is after the Closing Time, the obligations of the several Underwriters to purchase the relevant Option Securities, may be terminated by the Representatives by notice to the Company at any time at or prior to Closing Time or such Date of Delivery, as the case may be, and such termination shall be without liability of any party to any other party except as provided in Section  4 and except that Sections 1 , 6 , 7 , 8 , 15 , 16 and 17 shall survive any such termination and remain in full force and effect.

SECTION 6. Indemnification .

(a) Indemnification of Underwriters . The Company agrees to indemnify and hold harmless each Underwriter, its directors, its officers, its affiliates (as such term is defined in Rule 501(b) under the 1933 Act (each, an “Affiliate”)), its selling agents and each person, if any, who controls any Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act as follows:

(i) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, arising out of any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto), including the Rule 430A Information, or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or arising out of any untrue statement or alleged untrue statement of a material fact included (A) in any preliminary prospectus, any Issuer Free Writing Prospectus, any Written Testing-the-Waters Communication, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto), or (B) in any materials or information provided to investors by, or with the approval of, the Company in connection with the marketing of the offering of the Securities (“Marketing Materials”), including any roadshow or investor presentations made to investors by the Company (whether in person or electronically), or the omission or alleged omission in any preliminary prospectus, Issuer Free Writing Prospectus, any Written Testing-the-Waters Communication, Prospectus or in any Marketing Materials of a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading;

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(ii) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, to the extent of the aggregate amount paid in settlement of any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or of any claim whatsoever based upon any such untrue statement or omission, or any such alleged untrue statement or omission; provided that (subject to Section  6(d) below) any such settlement is effected with the written consent of the Company;

(iii) against any and all expense whatsoever, as incurred (including the reasonable fees and disbursements of counsel chosen by the Representatives), reasonably incurred in investigating, preparing or defending against any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever based upon any such untrue statement or omission, or any such alleged untrue statement or omission, to the extent that any such expense is not paid under (i) or (ii) above;

provided, however, that this Section  6 shall not apply to any loss, liability, claim, damage or expense to the extent arising out of any untrue statement or omission or alleged untrue statement or omission made in the Registration Statement (or any amendment thereto), including the Rule 430A Information, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with the Underwriter Information.

(b) Indemnification of Company, Directors and Officers . Each Underwriter severally agrees to indemnify and hold harmless the Company, its directors, each of its officers who signed the Registration Statement, and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act, against any and all loss, liability, claim, damage and expense described in the indemnity contained in subsection (a) of this Section, as incurred, but only with respect to untrue statements or omissions, or alleged untrue statements or omissions, made in the Registration Statement (or any amendment thereto), including the Rule 430A Information, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with the Underwriter Information.

(c) Actions against Parties; Notification . Each indemnified party shall give notice as promptly as reasonably practicable to each indemnifying party of any action commenced against it in respect of which indemnity may be sought hereunder, but failure to so notify an indemnifying party shall not relieve such indemnifying party from any liability hereunder to the extent it is not materially prejudiced as a result thereof and in any event shall not relieve it from any liability which it may have otherwise than on account of this indemnity agreement. In the case of parties indemnified pursuant to Section  6(a) above, counsel to the indemnified parties shall be selected by the Representatives, and, in the case of parties indemnified pursuant to Section  6(b) above, counsel to the indemnified parties shall be selected by the Company. An indemnifying party may participate at its own expense in the defense of any such action; provided, however, that counsel to the indemnifying party shall not (except with the consent of the indemnified party) also be counsel to the indemnified party. In no event shall the indemnifying parties be liable for fees and expenses of more than one counsel (in addition to any local counsel) separate from their own counsel for all indemnified parties in connection with any one action or separate but similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances; provided, that, if indemnity is sought pursuant to Section  6(e) , then, in addition to the fees and expenses of such counsel for the indemnified parties, the indemnifying party shall be liable for the reasonable fees and expenses of not more than one counsel (in addition to any local counsel) separate from its own counsel and that of the other indemnified parties for the QIU in its capacity as a “qualified independent underwriter” and all persons, if any, who control the QIU within the meaning of Section 15 of the 1933 Act or Section 20 of 1934 Act in connection with any one action or separate but similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances if, in

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the reasonable judgment of the QIU, there may exist a conflict of interest between the QIU and the other indemnified parties. Any such separate counsel for the QIU and such control persons of the QIU shall be designated in writing by the QIU. No indemnifying party shall, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever in respect of which indemnification or contribution could be sought under this Section  6 or Section  7 hereof (whether or not the indemnified parties are actual or potential parties thereto), unless such settlement, compromise or consent (i) includes an unconditional release of each indemnified party from all liability arising out of such litigation, investigation, proceeding or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party.

(d) Settlement without Consent if Failure to Reimburse . If at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel, such indemnifying party agrees that it shall be liable for any settlement of the nature contemplated by Section  6(a)(ii) or settlement of any claim in connection with any violation referred to in Section  6(f) effected without its written consent if (i) such settlement is entered into more than 45 days after receipt by such indemnifying party of the aforesaid request, (ii) such indemnifying party shall have received notice of the terms of such settlement at least 30 days prior to such settlement being entered into and (iii) such indemnifying party shall not have reimbursed such indemnified party in accordance with such request prior to the date of such settlement.

(e) Indemnification of QIU . In addition to and without limitation of the Company’s obligation to indemnify Tudor, Pickering, Holt & Co. Securities, Inc. as an Underwriter, the Company also agrees to indemnify and hold harmless the QIU, its Affiliates and selling agents and each person, if any, who controls the QIU within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act, from and against any and all loss, liability, claim, damage and expense whatsoever, as incurred, incurred as a result of the QIU’s participation as a “qualified independent underwriter” within the meaning of Rule 2720 in connection with the offering of the Securities.

(f) Indemnification for Reserved Securities . In connection with the offer and sale of the Reserved Securities, the Company agrees to indemnify and hold harmless the Underwriters, their Affiliates and selling agents and each person, if any, who controls any Underwriter within the meaning of either Section 15 of the 1933 Act or Section 20 of the 1934 Act, from and against any and all loss, liability, claim, damage and expense (including, without limitation, any legal or other expenses reasonably incurred in connection with defending, investigating or settling any such action or claim), as incurred, (i) arising out of the violation of any applicable laws or regulations of foreign jurisdictions where Reserved Securities have been offered, (ii) arising out of any untrue statement or alleged untrue statement of a material fact contained in any prospectus wrapper or other material prepared by or with the consent of the Company for distribution to Invitees in connection with the offering of the Reserved Securities or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, (iii) caused by the failure of any Invitee to pay for and accept delivery of Reserved Securities which have been orally confirmed for purchase by any Invitee by 11:59 P.M. (New York City time) on the date of this Agreement or (iv) related to, or arising out of or in connection with, the offering of the Reserved Securities. The Company shall reimburse the Underwriters promptly upon demand for any legal or other expenses reasonably incurred by them in connection with investigating or defending or preparing to defend against any such loss, liability, claim, damage or expense as such expenses are incurred.

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SECTION 7. Contribution . If the indemnification provided for in Section  6 hereof is for any reason unavailable to or insufficient to hold harmless an indemnified party in respect of any losses, liabilities, claims, damages or expenses referred to therein, then each indemnifying party shall contribute to the aggregate amount of such losses, liabilities, claims, damages and expenses incurred by such indemnified party, as incurred, (i) in such proportion as is appropriate to reflect the relative benefits received by the Company, on the one hand, and the Underwriters, on the other hand, from the offering of the Securities pursuant to this Agreement or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company, on the one hand, and of the Underwriters, on the other hand, in connection with the statements or omissions, or in connection with any violation of the nature referred to in Section  6(f) hereof, which resulted in such losses, liabilities, claims, damages or expenses, as well as any other relevant equitable considerations.

The relative benefits received by the Company, on the one hand, and the Underwriters, on the other hand, in connection with the offering of the Securities pursuant to this Agreement shall be deemed to be in the same respective proportions as the total net proceeds from the offering of the Securities pursuant to this Agreement (before deducting expenses) received by the Company, on the one hand, and the total underwriting discount received by the Underwriters, on the other hand, in each case as set forth on the cover of the Prospectus, bear to the aggregate initial public offering price of the Securities as set forth on the cover of the Prospectus.

The relative fault of the Company, on the one hand, and the Underwriters, on the other hand, shall be determined by reference to, among other things, whether any such untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Company or by the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission or any violation of the nature referred to in Section  6(f) hereof.

The Company and the Underwriters agree that Tudor, Pickering, Holt & Co. Securities, Inc. will not receive any additional benefits hereunder for serving as the QIU in connection with the offering and sale of the Securities.

The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section  7 were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this Section  7 . The aggregate amount of losses, liabilities, claims, damages and expenses incurred by an indemnified party and referred to above in this Section  7 shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in investigating, preparing or defending against any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever based upon any such untrue or alleged untrue statement or omission or alleged omission.

Notwithstanding the provisions of this Section  7 , no Underwriter shall be required to contribute any amount in excess of the underwriting commissions received by such Underwriter in connection with the Shares underwritten by it and distributed to the public.

No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the 1933 Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

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For purposes of this Section  7 , each person, if any, who controls an Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act and each Underwriter’s Affiliates and selling agents shall have the same rights to contribution as such Underwriter, and each director of the Company, each officer of the Company who signed the Registration Statement, and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act shall have the same rights to contribution as the Company, as the case may be. The Underwriters’ respective obligations to contribute pursuant to this Section  7 are several in proportion to the number of Initial Securities set forth opposite their respective names in Schedule A hereto and not joint.

SECTION 8. Representations, Warranties and Agreements to Survive . All representations, warranties and agreements contained in this Agreement or in certificates of officers of the Company or any of its subsidiaries submitted pursuant hereto, shall remain operative and in full force and effect regardless of (i) any investigation made by or on behalf of any Underwriter or its Affiliates or selling agents, any person controlling any Underwriter, its officers or directors, any person controlling the Company and (ii) delivery of and payment for the Securities.

SECTION 9. Termination of Agreement .

(a) Termination . The Representatives may terminate this Agreement, by notice to the Company, at any time at or prior to the Closing Time (i) if there has been, in the judgment of the Representatives, since the time of execution of this Agreement or since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, any material adverse change or any development involving a prospective material adverse change in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company and its subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business, or (ii) if there has occurred any material adverse change in the financial markets in the United States or the international financial markets, any outbreak of hostilities or escalation thereof or other calamity or crisis or any change or development involving a prospective change in national or international political, financial or economic conditions, in each case the effect of which is such as to make it, in the judgment of the Representatives, impracticable or inadvisable to proceed with the completion of the offering or to enforce contracts for the sale of the Securities, or (iii) if trading in any securities of the Company has been suspended or materially limited by the Commission or the NYSE or (iv) if trading generally on the NYSE MKT or the NYSE or in the Nasdaq Global Market has been suspended or materially limited, or minimum or maximum prices for trading have been fixed, or maximum ranges for prices have been required, by any of said exchanges or by order of the Commission, FINRA or any other governmental authority, or (v) a material disruption has occurred in commercial banking or securities settlement or clearance services in the United States or with respect to Clearstream or Euroclear systems in Europe, or (vi) if a banking moratorium has been declared by either Federal or New York authorities.

(b) Liabilities . If this Agreement is terminated pursuant to this Section, such termination shall be without liability of any party to any other party except as provided in Section  4 hereof, and provided further that Sections 1 , 6 , 7 , 8 , 15 , 16 and 17 shall survive such termination and remain in full force and effect.

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SECTION 10. Default by One or More of the Underwriters . If one or more of the Underwriters shall fail at the Closing Time or a Date of Delivery to purchase the Securities which it or they are obligated to purchase under this Agreement (the “Defaulted Securities”), the Representatives shall have the right, within 24 hours thereafter, to make arrangements for one or more of the non-defaulting Underwriters, or any other underwriters, to purchase all, but not less than all, of the Defaulted Securities in such amounts as may be agreed upon and upon the terms herein set forth; if, however, the Representatives shall not have completed such arrangements within such 24-hour period, then:

(i) if the number of Defaulted Securities does not exceed 10% of the number of Securities to be purchased on such date, each of the non-defaulting Underwriters shall be obligated, severally and not jointly, to purchase the full amount thereof in the proportions that their respective underwriting obligations hereunder bear to the underwriting obligations of all non-defaulting Underwriters, or

(ii) if the number of Defaulted Securities exceeds 10% of the number of Securities to be purchased on such date, each of the non-defaulting Underwriters shall have the right to purchase all, but shall not have the obligation to purchase any, of the Defaulted Securities, and if such non-defaulting Underwriters do not elect to purchase all of the Defaulted Securities, this Agreement or, with respect to any Date of Delivery which occurs after the Closing Time, the obligation of the Underwriters to purchase, and the Company to sell, the Option Securities to be purchased and sold on such Date of Delivery shall terminate without liability on the part of any non-defaulting Underwriter.

No action taken pursuant to this Section shall relieve any defaulting Underwriter from liability in respect of its default.

In the event of any such default which does not result in a termination of this Agreement or, in the case of a Date of Delivery which is after the Closing Time, which does not result in a termination of the obligation of the Underwriters to purchase and the Company to sell the relevant Option Securities, as the case may be, either the (i) Representatives or (ii) the Company shall have the right to postpone Closing Time or the relevant Date of Delivery, as the case may be, for a period not exceeding seven days in order to effect any required changes in the Registration Statement, the General Disclosure Package or the Prospectus or in any other documents or arrangements. As used herein, the term “Underwriter” includes any person substituted for an Underwriter under this Section  10 .

SECTION 11. Default by the Company . If the Company shall fail at the Closing Time or a Date of Delivery, as the case may be, to sell the number of Securities that it is obligated to sell hereunder, then this Agreement shall terminate without any liability on the part of any non-defaulting party; provided, however, that the provisions of Sections 1 , 4 , 6 , 7 , 8 , 15 , 16 and 17 shall remain in full force and effect. No action taken pursuant to this Section shall relieve the Company from liability, if any, in respect of such default.

SECTION 12. Notices . All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted by any standard form of telecommunication. Notices to the Underwriters shall be directed to Merrill Lynch at One Bryant Park, New York, New York 10036, attention of Syndicate Department (facsimile: (646) 855-3073), with a copy to ECM Legal (facsimile: (212) 230-8730); Piper Jaffray & Co. at 800 Nicollet Mall, Suite 1200, Minneapolis, Minnesota 55402 (facsimile: (612) 303-1070); notices to the Company shall be directed to it at 1415 Louisiana Street, Suite 2900, Houston, Texas 77002, attention of General Counsel.

SECTION 13. No Advisory or Fiduciary Relationship . The Company acknowledges and agrees that (a) the purchase and sale of the Securities pursuant to this Agreement, including the determination of the initial public offering price of the Securities and any related discounts and commissions, is an arm’s-length commercial transaction between the Company, on the one hand, and the several Underwriters, on the other hand, (b) in connection with the offering of the Securities and the process leading thereto, each Underwriter is and has been acting solely as a principal and is not the agent or fiduciary of the Company,

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any of its subsidiaries, or its respective stockholders, equityholders, creditors, employees or any other party, (c) no Underwriter has assumed or will assume an advisory or fiduciary responsibility in favor of the Company with respect to the offering of the Securities or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company, any of its subsidiaries on other matters) and no Underwriter has any obligation to the Company with respect to the offering of the Securities except the obligations expressly set forth in this Agreement, (d) the Underwriters and their respective affiliates may be engaged in a broad range of transactions that involve interests that differ from those of the Company, and (e) the Underwriters have not provided any legal, accounting, regulatory or tax advice with respect to the offering of the Securities and the Company has consulted its own respective legal, accounting, regulatory and tax advisors to the extent it deemed appropriate.

SECTION 14. Parties . This Agreement shall each inure to the benefit of and be binding upon the Underwriters, the Company and their respective successors. Nothing expressed or mentioned in this Agreement is intended or shall be construed to give any person, firm or corporation, other than the Underwriters, the Company and their respective successors and the controlling persons and officers and directors referred to in Sections 6 and 7 and their heirs and legal representatives, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision herein contained. This Agreement and all conditions and provisions hereof are intended to be for the sole and exclusive benefit of the Underwriters, the Company and their respective successors, and said controlling persons and officers and directors and their heirs and legal representatives, and for the benefit of no other person, firm or corporation. No purchaser of Securities from any Underwriter shall be deemed to be a successor by reason merely of such purchase.

SECTION 15. Trial by Jury . The Company (on its behalf and, to the extent permitted by applicable law, on behalf of its stockholders and affiliates), and each of the Underwriters hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

SECTION 16. GOVERNING LAW . THIS AGREEMENT AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED TO THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF, THE STATE OF NEW YORK WITHOUT REGARD TO ITS CHOICE OF LAW PROVISIONS.

SECTION 17. Consent to Jurisdiction; Waiver of Immunity . Any legal suit, action or proceeding arising out of or based upon this Agreement or the transactions contemplated hereby (“Related Proceedings”) shall be instituted in (i) the federal courts of the United States of America located in the City and County of New York, Borough of Manhattan or (ii) the courts of the State of New York located in the City and County of New York, Borough of Manhattan (collectively, the “Specified Courts”), and each party irrevocably submits to the exclusive jurisdiction (except for proceedings instituted in regard to the enforcement of a judgment of any such court (a “Related Judgment”), as to which such jurisdiction is non-exclusive) of such courts in any such suit, action or proceeding. Service of any process, summons, notice or document by mail to such party’s address set forth above shall be effective service of process for any suit, action or other proceeding brought in any such court. The parties irrevocably and unconditionally waive any objection to the laying of venue of any suit, action or other proceeding in the Specified Courts and irrevocably and unconditionally waive and agree not to plead or claim in any such court that any such suit, action or other proceeding brought in any such court has been brought in an inconvenient forum.

SECTION 18. TIME . TIME SHALL BE OF THE ESSENCE OF THIS AGREEMENT. EXCEPT AS OTHERWISE SET FORTH HEREIN, SPECIFIED TIMES OF DAY REFER TO NEW YORK CITY TIME.

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SECTION 19. Counterparts . This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same Agreement.

SECTION 20. Effect of Headings . The Section headings herein are for convenience only and shall not affect the construction hereof.

(Signature Page Follows)

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Quintana Energy Services Inc. Underwriting Agreement

For themselves and as Representatives of the other Underwriters named in Schedule A hereto.

Quintana Energy Services Inc. Underwriting Agreement

SCHEDULE A

The initial public offering price per share for the Securities shall be $10.00.

The purchase price per share for the Securities to be paid by the several Underwriters shall be $9.40, being an amount equal to the initial public offering price set forth above less $0.60 per share, subject to adjustment in accordance with Section  2(b) for dividends or distributions declared by the Company and payable on the Initial Securities but not payable on the Option Securities.

Sch A - 1

SCHEDULE B-1

Pricing Terms

Sch B - 1

SCHEDULE B-2

Free Writing Prospectuses

Sch B - 2

SCHEDULE B-3

List of Written Testing-the-Water Communications

Testing the Waters presentation dated August 2017.

Sch B - 3

SCHEDULE C

List of Persons and Entities Subject to Lock-up

Rogers Herndon

Christopher J. Baker

Keefer M. Lehner

Max L. Bouthillette

Corbin J. Robertson, Jr.

Dag Skindlo

Gunnar Eliassen

Dalton Boutté, Jr.

Rocky L. Duckworth

Archer Holdco LLC

Geveran Blocker LLC

QES Holdco LLC

Robertson QES Investment LLC

Quintana Energy Partners, L.P.

Quintana Energy Fund-FI, LP

Quintana Energy Fund-TE, LP

Quintana Energy Partners—QES Holdings, L.L.C.

Geveran Investments Limited

Sch C

Exhibit A

FORM OF OPINION OF COMPANY’S COUNSEL

TO BE DELIVERED PURSUANT TO SECTION 5(b)

1. The Company has been duly incorporated and is validly existing as a corporation, and is in good standing under the laws of the State of Delaware, with the corporate power and authority to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Registration Statement, the General Disclosure Package and the Final Prospectus; and is duly qualified to do business as a foreign corporation and is in good standing in the State of Texas.

2. Quintana Energy Services LP is validly existing as a limited partnership and in good standing under the laws of the State of Delaware, with the limited partnership power and authority to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Registration Statement, the General Disclosure Package and the Final Prospectus, and is duly qualified to do business as a foreign limited partnership and is in good standing in the State of Texas.

3. QES Energy Services GP LLC is validly existing as a limited liability company and in good standing under the laws of the State of Delaware, with the limited liability company power and authority to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Registration Statement, the General Disclosure Package and the Final Prospectus, and is duly qualified to do business as a foreign limited liability company and is in good standing in the State of Texas.

4. QES Holdco LLC is validly existing as a limited liability company and in good standing under the laws of the State of Delaware, with the limited liability company power and authority to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Registration Statement, the General Disclosure Package and the Final Prospectus, and is duly qualified to do business as a foreign limited liability company and is in good standing in the State of Texas.

5. The Company owns such limited liability company interests of QES Holdco LLC and such limited partnership interests of Quintana Energy Services LP as are described in the Registration Statement, the General Disclosure Package and the Final Prospectus; and the Company owns such interests in QES Holdco LLC and Quintana Energy Services LP free and clear of all liens, defects, encumbrances, equities or claims (“ Liens ”) (other than Liens arising under or in connection with the Credit Agreement, Term Loan or New Credit Agreement as described in the Registration Statement, the General Disclosure Package, and the Final Prospectus) (A) in respect of which a financing statement under the Uniform Commercial Code of the States of Delaware or Texas naming the Company as debtor is on file in the office of the Secretaries of State of the State of Delaware and the State of Texas as of February 12, 2018 or (B) otherwise known to us, without independent investigation other than those created by or arising under the Delaware Limited Liability Company Act (“ Delaware LLC Act ”) or the Delaware Revised Uniform Limited Partnership Act (“ Delaware Limited Partnership Act ”).

6. The Offered Securities to be issued and sold by the Company to the Underwriters under the Underwriting Agreement have been duly authorized in accordance with the Amended and Restated Certificate of Incorporation of the Company (the “ Certificate of Incorporation ”) and the Amended and Restated Bylaws of the Company (the “ Bylaws ,” and together with the Certificate of Incorporation, the “ Governing Documents ”) and, when issued and delivered by the Company to the Underwriters upon payment therefor in accordance with the Underwriting Agreement, will be validly issued in accordance with the Governing Documents, free of preemptive rights under federal law, the Delaware General Corporation Law (the “ DGCL ”) or the Governing Documents, fully paid and non-assessable.

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7. Except as set forth in the General Disclosure Package and the Final Prospectus, there are no persons with registration rights or other similar rights created pursuant to any agreement to have any securities registered pursuant to the Registration Statement or registered by the Company under the Securities Act or otherwise; and, except as set forth in the General Disclosure Package and the Final Prospectus, no options, warrants or other rights to purchase, agreements or other obligations to issue, or convert any obligations into or exchange any securities for, shares of capital stock of or ownership interests in the Company created pursuant to any agreement filed as an exhibit to the Registration Statement are outstanding.

8. The execution and delivery of the Underwriting Agreement by the Company does not, and the performance by the Company of its obligations under the Underwriting Agreement, the offering, issuance and sale of the Offered Securities pursuant to the terms of the Underwriting Agreement and the application of the proceeds from the sale of the Offered Securities as described under “Use of Proceeds” in the Final Prospectus will not, (a) result in a breach or default (or an event that, with notice or lapse of time or both, would constitute such an event) under any agreement that is filed as an exhibit to the Registration Statement; (b) violate the provisions of the Certificate of Incorporation or the similar organizational documents of the Company’s Subsidiaries; (c) violate any federal, New York or Texas statute, rule or regulation applicable to the Company or the DGCL, the Delaware Limited Partnership Act, or the Delaware LLC Act, or (d) result in the creation of any additional lien upon any property or assets of the Company or its Subsidiaries under the New Credit Agreement, except, with respect to clauses (a), (c) and (d), as would not, individually or in the aggregate, reasonably be expected to materially impair the ability of the Company and its Subsidiaries to consummate the Reorganization Transactions or the transactions contemplated by the Underwriting Agreement in connection with the offering, issuance and sale of the Offered Securities by the Company (a “ Material Adverse Effect ”); it being understood that we express no opinion in clause (c) of this paragraph (8) with respect to any federal or state securities, blue sky or anti-fraud laws, rules or regulations.

9. The Underwriting Agreement has been duly authorized, executed and delivered by the Company.

10. Each of the Transaction Documents has been duly authorized, executed and delivered by the Company and constitutes a valid and legally binding agreement of the Company, enforceable against the Company in accordance with its terms, except as enforceability may be limited (A) by applicable bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally or by equitable principles (whether considered in a proceeding at law or in equity) relating to enforceability and (B) public policy, applicable law relating to fiduciary duties and indemnification and an implied covenant of good faith and fair dealing.

11. No consent, approval, authorization or order of, registration or qualification with any federal or Texas or New York court or governmental agency or any Delaware court or governmental agency acting pursuant to the DGCL is required to be obtained or made by the Company or its Subsidiaries for the execution, delivery and performance by the Company of the Underwriting Agreement, the compliance by the Company with the terms thereof and the issuance and sale of the Offered Securities by the Company being delivered on the date hereof pursuant to the Underwriting Agreement, except (i) as have been obtained or made, (ii) for the registration of the offering and sale

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of the Offered Securities under the Securities Act, (iii) for such consents, approvals, authorizations, orders, registrations or qualifications as may be required under applicable federal or state securities or blue sky laws and the approval by FINRA of the underwriting terms and arrangements in connection with the purchase and distribution of the Offered Securities by the Underwriters or (iv) for such consents that, if not obtained, have not or would not, in the aggregate, reasonably be expected to have a Material Adverse Effect.

12. The Registration Statement has been declared effective under the Act; to our knowledge, no stop order suspending the effectiveness of the Registration Statement has been issued and no proceedings for that purpose have been instituted or threatened by the Commission; and any required filing of the Final Prospectus pursuant to Rule 424(b) under the Act has been made in the manner and within the time period required by such rule.

13. The statements set forth in the Final Prospectus under the headings “Description of Capital Stock,” “Business—Intellectual Property,” “Business—Government Regulation,” “Certain Relationships and Related Party Transactions,” “Management—Status as a Controlled Company,” “Material U.S. Federal Income Tax Considerations For Non-U.S. Holders,” “Certain ERISA Considerations,” and “Shares Eligible for Future Sale” and in the Registration Statement in Part II, Item 14, to the extent that they constitute descriptions or summaries of the terms of the Common Stock or the documents referred to therein, or refer to statements of federal law, the DGCL, the Delaware Limited Partnership Act or the Delaware LLC Act, or are legal conclusions, are accurate in all material respects.

14. The Company is not, and, after giving effect to the offering and sale of the Offered Securities pursuant to the terms of the Underwriting Agreement and application of the net proceeds thereof as described in the Registration Statement, the General Disclosure Package and the Final Prospectus under the caption “Use of Proceeds,” will not be, required to register as an “investment company,” as such term is defined in the Investment Company Act and the rules and regulations of the Commission thereunder.

15. Each of the Registration Statement, at the time it was declared effective, the General Disclosure Package, as of the Applicable Time, and the Final Prospectus, when filed with the Commission pursuant to Rule 424(b) under the Securities Act and at the Closing Date (in each case other than (a) the financial statements and related schedules, including the notes and schedules thereto and the auditor’s report thereon and (b) the other financial data derived therefrom, in each case included in or omitted from the Registration Statement, the General Disclosure Package and the Final Prospectus, as to which we express no opinion), appeared on their face to comply as to form in all material respects with the requirements of the Securities Act.

We have participated in conferences with representatives of the Company and with representatives of its independent accountants and counsel for the Underwriters, at which conferences the contents of the Registration Statement, the General Disclosure Package and the Final Prospectus and any amendment and supplement thereto and related matters were discussed. Although we have not undertaken to determine independently, and do not assume any responsibility for, or express opinion regarding, the accuracy, completeness or fairness of the statements contained in the Registration Statement, the General Disclosure Package or the Final Prospectus (other than listed in paragraphs 13 and 15 above), based upon the participation described above (relying as to factual matters upon statements of fact made to us by representatives of the Company), nothing has come to our attention to cause us to believe that:

(a) the Registration Statement, at the time it was declared effective (including the information, if any, deemed pursuant to Rule 430A to be part of the Registration Statement at the time of effectiveness), contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading;

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(b) the General Disclosure Package, as of the Applicable Time, included an untrue statement of a material fact or omitted to state a material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading; or

(c) the Final Prospectus, as of its date or as of the date hereof, included or includes an untrue statement of a material fact or omitted or omits to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading;

except that in each case, we do not express any belief with respect to (i) the financial statements and related schedules, including the notes and schedules thereto and the auditor’s report thereon or (ii) any other financial, accounting or statistical information derived from the financial statements, in each case included in or omitted from the Registration Statement, the General Disclosure Package and the Final Prospectus.

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[Form of lock-up from directors, officers or other stockholders pursuant to Section  5(i) ]

Exhibit B

[•], 2018

Merrill Lynch, Pierce, Fenner & Smith

                    Incorporated,

Piper Jaffray & Co.

as Representatives of the several

Underwriters to be named in the

within mentioned Underwriting Agreement

c/o Merrill Lynch, Pierce, Fenner & Smith

                           Incorporated

One Bryant Park

New York, New York 10036

Dear Sirs:

The undersigned, a stockholder [and an officer and/or director] of Quintana Energy Services Inc., Delaware corporation (the “Company”), understands that Merrill Lynch, Pierce, Fenner & Smith Incorporated (“Merrill Lynch”) and Piper Jaffray & Co. (“Piper Jaffray”) propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with the Company providing for the public offering of shares of the Company’s common stock, par value $0.01 per share (the “Common Stock”). In recognition of the benefit that such an offering will confer upon the undersigned as a stockholder [and an officer and/or director] of the Company, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned agrees with each underwriter to be named in the Underwriting Agreement that, during the period beginning on the date hereof and ending on the date that is 180 days from the date of the Underwriting Agreement (subject to extensions as discussed below) (the “Restricted Period”), the undersigned will not, without the prior written consent of Merrill Lynch and Piper Jaffray, (i) directly or indirectly, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise transfer or dispose of any shares of the Company’s Common Stock or common units representing limited partner interests in Quintana Energy Partners, L.P., a Delaware limited partnership (“Common Units”), or any securities convertible into or exercisable or exchangeable for Common Stock or Common Units, whether now owned or hereafter acquired by the undersigned or with respect to which the undersigned has or hereafter acquires the power of disposition (collectively, the “Lock-Up Securities”), or exercise any right with respect to the registration of any of the Lock-up Securities, or file or cause to be filed any registration statement in connection therewith, under the Securities Act of 1933, as amended (other than a confidential submission of a draft registration statement with the U.S. Securities and Exchange Commission that is not to be made publicly available until the expiration of the Restricted Period), or (ii) enter into any swap or any other agreement or any transaction that transfers, in whole or in part, directly or indirectly, the economic consequence of ownership of the Lock-Up Securities, whether any such swap or transaction is to be settled by delivery of Common Stock, Common Units or other securities, in cash or otherwise. If the undersigned is an officer or director of the Company, the undersigned further agrees that the foregoing provisions shall be equally applicable to any issuer-directed Securities the undersigned may purchase in the offering.

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If the undersigned is an officer or director of the Company, (1) Merrill Lynch and Piper Jaffray agree that, at least three business days before the effective date of any release or waiver of the foregoing restrictions in connection with a transfer of shares of the Common Stock or Common Units, Merrill Lynch or Piper Jaffray will notify the Company of the impending release or waiver, and (2) the Company has agreed in the Underwriting Agreement to announce the impending release or waiver by press release through a major news service at least two business days before the effective date of the release or waiver. Any release or waiver granted by Merrill Lynch and Piper Jaffray hereunder to any such officer or director shall only be effective two business days after the publication date of such press release. The provisions of this paragraph will not apply if (i) the release or waiver is effected solely to permit a transfer not for consideration and (ii) the transferee has agreed in writing to be bound by the same terms described in this letter to the extent and for the duration that such terms remain in effect at the time of the transfer.

Notwithstanding the foregoing, and subject to the conditions below, the undersigned may transfer the Lock-Up Securities without the prior written consent of Merrill Lynch or Piper Jaffray, provided that (1) Merrill Lynch and Piper Jaffray receive a signed lock-up agreement for the balance of the lockup period, other than pursuant to clauses (vi) or (vii) below, from each donee, trustee, distributee, or transferee, as the case may be, (2) any such transfer shall not involve a disposition for value, and (3) such transfers, if pursuant to clauses (i), (ii), (iii) or (iv) below, are not required to be reported with the Securities and Exchange Commission on Form 4 in accordance with Section 16 of the Securities Exchange Act of 1934, as amended, and the undersigned does not otherwise voluntarily effect any public filing or report regarding such transfers:

(b) to a trust, family limited liability company or like entity formed for the direct or indirect benefit of the undersigned or the immediate family member of the undersigned,

(c) by will, other testamentary document or intestate succession,

(d) to a partnership, limited liability company or other entity of which the undersigned and the immediate family member of the undersigned are the legal and beneficial owners of all of the outstanding equity securities or similar interests, and

(e) pursuant to a domestic order, divorce settlement, divorce decree or separation agreement or order of a court or regulatory agency; or

(v) to the Company or any of its Subsidiaries in connection with the exercise of options or warrants or the vesting, exercise or settlement of any other equity-based award, in each case, granted pursuant to the Company’s equity incentive plans and disclosed in the Registration Statement and Prospectus, including any shares of Common Stock or Common Units withheld by the Company or any of its Subsidiaries to pay the applicable exercise price or tax withholding associated with such awards, provided that the restrictions contained in this lock-up agreement shall apply to any securities issued upon such exercise or vesting and for any options or other awards that expire, vest or become settled during the Restricted Period;

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(vi) pursuant to the Underwriting Agreement; or

(vii) in transactions contemplated by the Master Reorganization Agreement to be entered into at the closing of the initial public offering of the Company’s Common Stock.

Furthermore, the undersigned may sell shares of Common Stock of the Company purchased by the undersigned on the open market following the initial public offering of Common Stock if and only if (i) such sales are not required to be reported in any public report or filing with the Securities and Exchange Commission, or otherwise and (ii) the undersigned does not otherwise voluntarily effect any public filing or report regarding such sales.

The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the Lock-Up Securities except in compliance with the foregoing restrictions.

The undersigned understands that, if (1) the Underwriting Agreement does not become effective by March 24, 2018, (2) the Company withdraws the registration statement relating to the initial public offering prior to the completion of the initial public offering, (3) prior to signing the Underwriting Agreement, the Company notifies Merrill Lynch and Piper Jaffray in writing that it does not intend to proceed with the initial public offering, or (4) if the Underwriting Agreement (other than the provisions thereof which survive termination) shall terminate or be terminated prior to payment for and delivery of the Common Stock to be sold thereunder, then the undersigned shall be released from all restrictions and obligations under this lock-up agreement.

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Exhibit C

FORM OF PRESS RELEASE

TO BE ISSUED PURSUANT TO SECTION 3(j)

Quintana Energy Services Inc.

[Date]

Quintana Energy Services Inc. (the “Company”) announced today that BofA Merrill Lynch, the lead book-running manager in the Company’s recent public sale of [9,259,259] shares of common stock, is [waiving] [releasing] a lock-up restriction with respect to                shares of the Company’s common stock held by [certain officers or directors] [an officer or director] of the Company. The [waiver] [release] will take effect on    ,                  20    , and the shares may be sold on or after such date.

This press release is not an offer for sale of the securities in the United States or in any other jurisdiction where such offer is prohibited, and such securities may not be offered or sold in the United States absent registration or an exemption from registration under the United States Securities Act of 1933, as amended.

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