Exhibit 10.1

CHART INDUSTRIES, INC.

AMENDMENT NO. 3

TO

EMPLOYMENT AGREEMENT

This Amendment No. 3 (the “Amendment”) to the Employment Agreement, dated February 26, 2008 and subsequently amended effective January 1, 2009 and January 1, 2010 (the “Agreement”), by and between Chart Industries, Inc. (the “Company”) and Samuel F. Thomas (“Executive”), is effective January 1, 2012.

WITNESSETH:

WHEREAS, the Company and the Executive desire to amend the Agreement; and

WHEREAS, the parties reserved the right to amend the Agreement pursuant to Section 13.c thereof.

NOW, THEREFORE, pursuant to Section 13.c of the Agreement, and effective as of January 1, 2012, the parties hereby amend the Agreement as follows:

1. In Section 3 of the Agreement, delete the dollar amount “$600,000” and replace with “$700,000”.

2. In Section 4 of the Agreement delete the phrase “of one hundred fifty percent (150%) of the Executive’s Base Salary (with it being understood that one hundred fifty percent (150%) of the Executive’s Base Salary is the “Target”)” in its entirety and replace it with “of one hundred thirty percent (130%) of the Executive’s Base Salary (with it being understood that one hundred thirty percent (130%) of the Executive’s Base Salary is the “Target”)”.

3. Except as set forth herein, the Agreement is not modified or amended.

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment.

Exhibit 10.2

CHART INDUSTRIES, INC.

AMENDMENT NO. 2

TO

EMPLOYMENT AGREEMENT

This Amendment No. 2 (the “Amendment”) to the Employment Agreement, dated February 26, 2008 and subsequently amended effective January 1, 2009 (the “Agreement”), by and between Chart Industries, Inc. (the “Company”) and Michael F. Biehl (“Executive”), is effective January 1, 2012.

WITNESSETH:

WHEREAS, the Company and the Executive desire to amend the Agreement; and

WHEREAS, the parties reserved the right to amend the Agreement pursuant to Section 13.c thereof.

NOW, THEREFORE, pursuant to Section 13.c of the Agreement, and effective as of January 1, 2012, the parties hereby amend the Agreement as follows:

1. In Section 3 of the Agreement, delete the dollar amount “$262,150” and replace with “$365,000”.

2. In Section 4 of the Agreement delete the phrase “of one hundred percent (100%) of the Executive’s Base Salary (with it being understood that one hundred percent (100%) of the Executive’s Base Salary is the “Target”)” in its entirety and replace it with “of ninety percent (90%) of the Executive’s Base Salary (with it being understood that ninety percent (90%) of the Executive’s Base Salary is the “Target”)”.

3. Except as set forth herein, the Agreement is not modified or amended.

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment.

Exhibit 10.3

CHART INDUSTRIES, INC.

AMENDMENT NO. 2

TO

EMPLOYMENT AGREEMENT

This Amendment No. 2 (the “Amendment”) to the Employment Agreement, dated February 26, 2008 and subsequently amended effective January 1, 2009 (the “Agreement”), by and between Chart Industries, Inc. (the “Company”) and Matthew J. Klaben (“Executive”), is effective January 1, 2012.

WITNESSETH:

WHEREAS, the Company and the Executive desire to amend the Agreement; and

WHEREAS, the parties reserved the right to amend the Agreement pursuant to Section 13.c thereof.

NOW, THEREFORE, pursuant to Section 13.c of the Agreement, and effective as of January 1, 2012, the parties hereby amend the Agreement as follows:

1. In Section 3 of the Agreement, delete the dollar amount “$210,000” and replace with “$295,000”.

2. In Section 4 of the Agreement delete the phrase “of seventy-five percent (75%) of the Executive’s Base Salary (with it being understood that seventy-five percent (75%) of the Executive’s Base Salary is the “Target”)” in its entirety and replace it with “of sixty-five percent (65%) of the Executive’s Base Salary (with it being understood that sixty-five percent (65%) of the Executive’s Base Salary is the “Target”)”.

3. Except as set forth herein, the Agreement is not modified or amended.

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment.

Exhibit 10.4

CHART INDUSTRIES, INC.

AMENDMENT NO. 3

TO

EMPLOYMENT AGREEMENT

This Amendment No. 3 (the “Amendment”) to the Employment Agreement, dated February 26, 2008 and subsequently amended effective January 1, 2009 and June 1, 2010 (the “Agreement”), by and between Chart Industries, Inc. (the “Company”) and Kenneth J. Webster (“Executive”), is effective January 1, 2012.

WITNESSETH:

WHEREAS, the Company and the Executive desire to amend the Agreement; and

WHEREAS, the parties reserved the right to amend the Agreement pursuant to Section 13.c thereof.

NOW, THEREFORE, pursuant to Section 13.c of the Agreement, and effective as of January 1, 2012, the parties hereby amend the Agreement as follows:

1. In Section 3 of the Agreement, delete the dollar amount “$180,000” and replace with “$210,000”.

2. In Section 4 of the Agreement delete the phrase “of sixty-five percent (65%) of the Executive’s Base Salary (with it being understood that sixty-five percent (65%) of the Executive’s Base Salary is the “Target”)” in its entirety and replace it with “of sixty percent (60%) of the Executive’s Base Salary (with it being understood that sixty percent (60%) of the Executive’s Base Salary is the “Target”)”.

3. Except as set forth herein, the Agreement is not modified or amended.

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment.

Exhibit 10.5

CHART INDUSTRIES, INC.

2009 OMNIBUS EQUITY PLAN

LEVERAGED RESTRICTED SHARE UNIT AGREEMENT

THIS LEVERAGED RESTRICTED SHARE UNIT AGREEMENT (the “ Agreement ”), is entered into as of this             day of             , 20            (the “ Grant Date ”), by and between Chart Industries, Inc., a Delaware corporation (the “ Company ”), and             (the “ Grantee ”).

WITNESSETH :

WHEREAS , the Compensation Committee of the Board of Directors of the Company (the “ Committee ”) administers the Chart Industries, Inc. 2009 Omnibus Equity Plan (the “ Plan ”); and

WHEREAS , the Committee desires to provide the Grantee with Leveraged Restricted Share Units under the Plan upon the terms and conditions set forth in this Agreement.

NOW , THEREFORE , the Company and the Grantee agree as follows:

1. Definitions . Unless the context otherwise indicates, the following words used herein shall have the following meanings wherever used in this Agreement:

Wherein,

The above ratio shall be subject to adjustment in accordance with Section 3.4 of the Plan. The Share price on any given day shall be the average daily closing price for the Shares over the twenty-trading-day period ending on that day, based on reported closing prices for the Shares for the twenty trading days (on which the Shares traded regular way in the market) ending on that day (or, if that day is not a trading day on which the Shares traded regular way in the market, then ending on the last trading day on which the Shares traded regular way in the market immediately preceding that day).

Notwithstanding this Section, and unless otherwise specified in the Agreement, capitalized terms shall have the meanings attributed to them under the Plan.

2. Grant of Restricted Share Units . As of the Grant Date, the Company grants to the Grantee, upon the terms and conditions set forth in this Agreement, a target number of (            ) (the “ Target Number ”) Restricted Share Units (the “ RSUs ”). The actual number of RSUs that Vest, if any, is subject to adjustment upward or downward from the Target Number pursuant to the vesting schedule and requirements set forth in Section 4 below. The Restricted Share Units are granted in accordance with, and subject to, all the terms, conditions and restrictions of the Plan, which is hereby incorporated by reference in its entirety. The RSUs give the Grantee the right to receive one (1) Share for each RSU subject to the satisfaction of the vesting requirements set forth in this Agreement. In the event of a conflict between any term or provision contained herein and a term or provision of the Plan, the applicable terms and provisions of the Plan will govern. The Grantee irrevocably agrees to, and accepts, the terms, conditions and restrictions of the Plan and this Agreement on his own behalf and on behalf of any beneficiaries, heirs, legatees, successors and assigns.

3. Restrictions on Transfer of Restricted Share Units . The Grantee and his or her beneficiaries, heirs, legatees, successors and assigns cannot sell, transfer, assign, pledge, hypothecate or otherwise directly or indirectly dispose of the Restricted Share Units (whether with or without consideration and whether voluntarily or involuntarily or by operation of law) or any interest therein.

4. Restriction Period .

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(x) multiplied by (y)  minus 50% of the Target Number of RSUs, where:

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5. Forfeiture . If the Committee determines in its sole and exclusive discretion that the Grantee’s Employment with the Company, its Subsidiaries and Affiliates has terminated prior to the Vesting Date for reasons other than those described in Section 4(b) above or prior to the occurrence of a Change in Control in Section 4(c) above, the Grantee will forfeit all of the RSUs, together with any dividend equivalents credited pursuant to Section 7(b) below, and any right to receive Shares under this Agreement with respect to such unvested RSUs and the Grantee will have no further interests under this Agreement. In addition, to the extent that the number of RSUs that Vest is reduced below the Target Number pursuant to Section 4(a) above or pro-rated pursuant to Section 4(b) above, the Grantee will forfeit any RSUs that are not Vested due to such reduction or pro-ration and any right to receive Shares under this Agreement with respect to such unvested RSUs together with any dividend equivalents credited with respect to such forfeited RSUs pursuant to Section 7(b) below.

6. Payment and Issuance of Common Shares . Subject to Section 26 below and the following sentence, the Company will deliver to the Grantee (or his or her beneficiary or beneficiaries) the Shares to which the Grantee is then entitled under this Agreement (including any Shares to which the Grantee is entitled as a result of dividend equivalents credited pursuant to Section 7(b) below) free and clear of any restrictions (except any applicable securities law restrictions) in a lump sum no later than 30 days following the first to occur of: (a) the Vesting Date under Section 4(a) above or (b) the date of the consummation of a Change in Control of the Company (each, a “ Payment Date ”). Notwithstanding the foregoing, if 50% of the Target Number of RSUs vest in accordance with Section 4(b)(i) above due to the Grantee’s death,

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Disability or Retirement with the Committee’s approval, then the Payment Date with respect to such RSUs, and any related dividend equivalents, shall be the date of the Grantee’s termination of Employment and the Company shall deliver to the Grantee (or his or her beneficiary or beneficiaries) the Shares with respect to such RSUs no later than 30 days following the date of the Grantee’s termination of Employment. Any otherwise Vested fractional Shares remaining as of a Payment Date shall be eliminated and cancelled.

7. Stockholder Rights .

8. Designation of Beneficiary . By properly executing and delivering a Designation of Beneficiary Form to the Company, the Grantee may designate an individual or individuals as his or her beneficiary or beneficiaries with respect to his or her interest under this Agreement. If the Grantee fails to properly designate a beneficiary, his or her interests under this Agreement will pass to the person or persons in the first of the following classes (who shall be deemed a beneficiary or beneficiaries) in which there are any survivors: (i) spouse at the time of death; (ii) issue, per stirpes ; (iii) parents; and (iv) the estate. Except as the Company may determine in its sole and exclusive discretion, a properly completed Designation of Beneficiary Form shall be deemed to revoke all prior designations with respect to this Agreement (or, if the form so provides, the Plan) upon its receipt and approval by the designated representative of the Company.

9. Non-Transferability of Shares; Legends . Upon the acquisition of any Shares

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pursuant to this Agreement, if the Shares have not been registered under the Securities Act of 1933, as amended (the “Act”), they may not be sold, transferred or otherwise disposed of unless a registration statement under the Act with respect to the Shares has become effective or unless the Grantee establishes to the satisfaction of the Company that an exemption from such registration is available. The Shares will bear a legend stating the substance of such restrictions, as well as any other restrictions the Committee deems necessary or appropriate. In addition, the Grantee will make or enter into such written representations, warranties and agreements as the Committee may reasonably request in order to comply with applicable securities laws or this Agreement.

10. Effect of Corporate Reorganization or Other Changes Affecting Number or Kind of Shares . The provisions of this Agreement will be applicable to the RSUs, Shares or other securities, if any, which may be acquired by the Grantee related to the RSUs as a result of any dividend or other distribution (whether in the form of cash, Shares, other securities or other property), recapitalization, stock split, reverse stock split, reorganization, redesignation, reclassification, merger, consolidation, liquidation, split-up, reverse split, spin-off, combination, repurchase or exchange of Shares or other securities of the Company, issuance of warrants or other rights to purchase Shares or other securities of the Company or other similar corporate transaction or event. Subject to Section 3.4 of the Plan, the Committee may appropriately adjust the number and kind of RSUs or Shares described in this Agreement to reflect such a change.

11. Plan Administration . The Plan is administered by the Committee, which has sole and exclusive power and discretion to interpret, administer, implement and construe the Plan and this Agreement. All elections, notices and correspondence relating to the Plan should be directed to the Secretary at:

Chart Industries, Inc.

One Infinity Corporate Centre, Suite 300

Garfield Heights, OH 44125

Attn.: Secretary

12. Notices . Any notice relating to this Agreement intended for the Grantee will be sent to the address appearing in the personnel records of the Company, its Affiliate or its Subsidiary. Either party may designate a different address in writing to the other. Any notice shall be deemed effective upon receipt by the addressee.

13. Termination of Agreement . This Agreement will terminate on the earliest of: (a) the date of termination of the Grantee’s Employment for reasons other than those provided in Section 4(b) above; (b) the date that Shares, if any, are delivered to the Grantee (or his or her beneficiary or beneficiaries); or (c) the date any termination of this agreement made pursuant to Section 23 below becomes effective. Any terms or conditions of this Agreement that the Company determines are reasonably necessary to effectuate its purposes will survive the termination of this Agreement. Without limiting the generality of the foregoing, the termination of this Agreement will not affect any obligation the Grantee may have, as determined by the

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Committee in its sole discretion, under any recoupment or “clawback” policy adopted by the Company.

14. Successors and Legal Representatives . This Agreement will bind and inure to the benefit of the Company and the Grantee and their respective heirs, beneficiaries, executors, administrators, estates, successors, assigns and legal representatives.

15. Integration . This Agreement, together with the Plan, constitutes the entire agreement between the Grantee and the Company with respect to the subject matter hereof and may not be modified, amended, renewed or terminated, nor may any term, condition or breach of any term or condition be waived, except pursuant to the terms of the Plan or Section 23 below or by a writing signed by the person or persons sought to be bound by such modification, amendment, renewal, termination or waiver. Any waiver of any term, condition or breach thereof will not be a waiver of any other term or condition or of the same term or condition for the future, or of any subsequent breach.

16. Separability . In the event of the invalidity of any part or provision of this Agreement, such invalidity will not affect the enforceability of any other part or provision of this Agreement.

17. Incapacity . If the Committee determines that the Grantee is incompetent by reason of physical or mental disability or a person incapable of handling his or her property, the Committee may deal directly with or direct any payment to the guardian, legal representative or person having the care and custody of the incompetent or incapable person. The Committee may require proof of incompetence, incapacity or guardianship, as it may deem appropriate before making any payment. In the event of a payment, the Committee will have no obligation thereafter to monitor or follow the application of the amounts so paid. Payments pursuant to this paragraph shall completely discharge the Company with respect to such payments.

18. No Further Liability . The liability of the Company, its Affiliates, and its Subsidiaries under this Agreement is limited to the obligations set forth herein and no terms or provisions of this Agreement shall be construed to impose any liability on the Company, its Affiliates, its Subsidiaries or the Committee in favor of any person or entity with respect to any loss, cost, tax or expense which the person or entity may incur in connection with or arising from any transaction related to this Agreement.

19. Section Headings . The section headings of this Agreement are for convenience and reference only and are not intended to define, extend or limit the contents of the sections.

20. No Right to Continued Employment . Nothing in this Agreement will be construed to confer upon the Grantee the right to continue in the employment or service of the Company, its Subsidiaries or Affiliates, or to be employed or serve in any particular position therewith, or affect any right which the Company, its Subsidiaries or an Affiliate may have to terminate the Grantee’s employment or service with or without cause.

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21. Governing Law . Except as may otherwise be provided in the Plan, this Agreement will be governed by, construed and enforced in accordance with the internal laws of the State of Delaware, without giving effect to its principles of conflict of laws.

22. Signature in Counterparts . This Agreement may be signed in counterparts, each of which shall be an original, with the same effect as if the signatures were upon the same instrument.

23. Amendment . The Committee may waive any conditions or rights under, amend any terms of, or alter, suspend, discontinue, cancel or terminate this Agreement, but no such waiver, amendment, alteration, suspension, discontinuance, cancellation or termination shall materially adversely affect the rights of the Grantee hereunder without the consent of the Grantee; provided, however , that the Grantee’s consent shall not be required to an amendment that is deemed necessary or appropriate by the Company to ensure (a) compliance with (or exemption from) Section 409A of the Code; (b) compliance with the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 or any regulations promulgated thereunder (the “ Dodd-Frank Act ”); or (c) compliance with the terms of any recoupment or “clawback” policy the Company adopts to comply with the requirements of the Dodd-Frank Act or any regulations promulgated thereunder (even if the terms of that policy are broader than the requirements of the Dodd-Frank Act).

24. Withholding . The Grantee may be required to pay to the Company or any Affiliate and the Company or any Affiliate shall have the right and is hereby authorized to withhold, any applicable withholding taxes in respect of the RSUs or payment of Shares thereunder, or any payment or transfer under or with respect to the RSUs or Shares and to take such other action as may be necessary in the opinion of the Committee to satisfy all obligations for the payment of such withholding taxes. The Grantee may elect, pursuant to a separate election form, to cover withholding taxes under this Award by (a) delivering Shares, provided that such Shares have been held by the Grantee for more than six (6) months or (b) having the Company withhold Shares from this Award, in each case with a Fair Market Value equal to the amount required to satisfy the minimum tax withholding obligations applicable to Grantee relating to this Award.

25. Section 409A of the Code . This Agreement, together with the Plan, constitutes the entire agreement between the parties with respect to the subject matter hereof. The parties intend that this Agreement be, at all relevant times, compliant with (or exempt from) Section 409A of the Code and all other applicable laws, and, if the Grantee’s interests hereunder are subject to Section 409A of the Code, this Agreement shall be so interpreted and administered. In addition to the general amendment rights of the Company with respect to the Plan, the Company specifically retains the unilateral right (but not the obligation) to make, prospectively or retroactively, any amendment to this Agreement or any related document as it deems necessary or desirable to more fully address issues in connection with compliance with (or exemption from) Section 409A of the Code and other laws. In no event, however, shall this section or any other provisions of this Agreement be construed to require the Company to provide any gross-up for the tax consequences of any provisions of, or payments under, this Agreement. Except as may be provided in another agreement to which the Company is bound, the Company and its

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Affiliates shall have no responsibility for tax or legal consequences to the Grantee (or the Grantee’s beneficiaries) resulting from the terms or operation of this Agreement or the Plan.

26. Six-Month Delay in Payment . Notwithstanding anything in this Agreement to the contrary, if at the time of the Grantee’s termination of Employment with the Company, the Grantee’s interests hereunder are subject to Section 409A of the Code and the Grantee is a “specified employee” as defined in Section 409A of the Code, and the deferral of the commencement of any payments or benefits otherwise payable hereunder as a result of such termination of Employment is necessary in order to prevent the imposition of any accelerated or additional tax under Section 409A of the Code, then the Company will defer the commencement of the payment of any such payments or benefits hereunder (without any reduction in such payments or benefits ultimately paid or provided to the Grantee) until the date that is six (6) months following the Grantee’s termination of Employment with the Company (or the earliest date as is permitted under Section 409A of the Code).

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IN WITNESS WHEREOF , the Company has caused this Agreement to be executed on its behalf by its duly authorized officer and the Grantee has hereunto set his hand.

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