Exhibit 10.1

JACOBS ENGINEERING GROUP INC.

1999 Stock Incentive Plan

Amendment No. 1

Pursuant to Paragraph 14 of the Jacobs Engineering Group Inc. 1999 Stock Incentive Plan (the “ Plan ”), the Plan is hereby amended as follows, effective as of May 26, 2011. Terms not otherwise defined herein shall have the same meaning as those terms are defined in the Plan.

“‘Change in Control’ means , with respect to the Company, a change in control of a nature that would be required to be reported in response to Item 6(e) of Schedule 14A of Regulation 14A under the Securities Exchange Act of 1934, as amended (the “1934 Act”), provided that such a change in control shall be deemed to have occurred at such time as (i) any “person” (as that term is used in Sections 13(d) and 14(d)(2) of the 1934 Act) is or becomes the “beneficial owner” (as defined in Rule 13d-3 under the 1934 Act), directly or indirectly, of securities representing 35% or more of the combined voting power for election of directors of the then outstanding securities of the Company or any successor of the Company; (ii) during any period of two (2) consecutive years or less, individuals who at the beginning of such period constituted the Board of Directors cease, for any reason, to constitute at least a majority of the Board of Directors, unless the election or nomination for election of each new director was approved by a vote of at least two-thirds of the directors then still in office who were directors at the beginning of the period; (iii) the consummation of any merger or consolidation as a result of which the Jacobs Common Stock (as defined below) shall be changed, converted or exchanged (other than by merger with a wholly owned subsidiary of the Company) or any liquidation of the Company or any sale or other disposition of 50% or more of the assets or earning power of the Company; or (iv) the consummation of any merger or consolidation to which the Company is a party as a result of which the persons who were shareholders of the Company immediately prior to the effective date of the merger or consolidation shall have beneficial ownership of less than 50% of the combined voting power for election of directors of the surviving corporation following the effective date of such merger or consolidation; provided, however, that no Change in Control shall be deemed to have occurred if, prior to such time as a Change in Control would otherwise be deemed to have occurred, the Board of Directors of the Company determines otherwise.”

“‘Incentive Award’ means an ISO, NQSO, Restricted Stock or Restricted Stock Unit granted or awarded under this Plan.”

“‘Cause’ means (unless otherwise expressly provided in an award agreement or another contract, including an employment agreement) the Company’s termination of the Employee’s employment with the Company following the occurrence of any one or more of the following: (1) the Employee is convicted of, or pleads guilty or nolo contendere to, a felony; (2) the Employee willfully and continually fails to substantially perform the Employee’s duties with the Company after written notification by the Company; (3) the Employee willfully engages in conduct that is materially injurious to the Company, monetarily or otherwise; (4) the Employee commits an act of gross misconduct in connection with the performance of the Employee’s duties to the Company; or (5) the Employee materially breaches any employment, confidentiality or other similar agreement between the Company and the Employee.

‘Good Reason’ means, without the Employee’s consent (1) a material reduction in the position, duties or responsibilities of the Employee from those in effect immediately prior to such change; (2) a reduction in the Employee’s base salary; (3) a relocation of the Employee’s primary work location to a distance of more than fifty (50) miles from its location as of immediately prior to such change; or (4) a material breach by the Company of any employment agreement between the Company and the Employee.

‘Qualifying Termination’ means a termination of an Employee’s employment with the Company (i) by the Company for any reason other than Cause or the Employee’s death or Disability or (ii) by the Employee for Good Reason.

‘Restricted Stock Unit’ means an Incentive Award granted pursuant to Paragraph 13 of this Plan, pursuant to which shares of Jacobs Common Stock may be issued in the future.”

Except as provided in Paragraph 18, in the event there is any change in the shares of Jacobs Common Stock through the declaration of stock dividends, or stock splits or through recapitalization or merger or consolidation or combination of shares or spin-offs or otherwise, the Committee or the Board of Directors of the Company shall make such adjustment, if any, as it may deem appropriate in the number of shares of Jacobs Common Stock available for Incentive Awards as well as the number of shares of Jacobs Common Stock subject to any outstanding Incentive Award and the option price, if any, thereof. Any such adjustment may provide for the elimination of any fractional shares that might otherwise become subject to any Incentive Award without payment therefore.”

5. Paragraph 13 of the Plan is hereby deleted in its entirety and replaced with the following:

“13. Awards of Restricted Stock and Restricted Stock Units.

(a) An Incentive Award in the form of shares of Restricted Stock or Restricted Stock Units may be awarded under this Paragraph 13 as determined by the Committee. Restricted Stock and Restricted Stock Units awarded under this Plan shall not be sold, exchanged, transferred, pledged, hypothecated or otherwise disposed of. The restrictions against disposition and the obligation to forfeit and surrender shares to the Company are herein referred to as “Forfeiture Restrictions”, and the shares that are then subject to the Forfeiture Restrictions are referred to as “Restricted Stock.” Any certificates representing Restricted Stock shall be appropriately legended to reflect the Forfeiture Restrictions. Restricted Stock Units are Incentive Awards denominated in units of Jacobs Common Stock under which the issuance of Jacobs Common Stock is subject to such vesting conditions (including continued employment or performance conditions) and other terms and conditions as the Committee deems appropriate. Each Restricted Stock Unit shall be equal to one share of Jacobs Common Stock and shall, subject to satisfaction of any vesting and/or other terms and conditions, entitle an Employee to the issuance of one share of Jacobs Common Stock in settlement of the Incentive Award.

(b) The number of shares of Jacobs Common Stock that may be issued under this Plan pursuant to awards of Restricted Stock and/or Restricted Stock Units shall be limited to 10% of the first 11,200,000 shares authorized for issuance as Incentive Awards under this Plan, and 50% of any shares authorized for issuance under this Plan in excess of 11,200,000. Any shares issued under this Plan pursuant to awards of Restricted Stock and/or Restricted Stock Units that are forfeited shall again be available for reissuance as Restricted Stock and/or Restricted Stock Units.

(c) The Forfeiture Restrictions with respect to Restricted Stock issued under this Paragraph 13 shall lapse and be of no further force and effect, and Restricted Stock Units issued under this Paragraph 13 shall vest, in each case upon the expiration of the period of time or the achievement of any performance conditions, in each case as fixed by the Committee upon or prior to the grant of the Incentive Award.

(d) In order to enforce the restrictions imposed upon shares of Restricted Stock, the Committee may require the recipient to enter into an escrow agreement providing that the certificates representing such shares of Restricted Stock shall remain in the physical custody of an escrow holder until any or all of the restrictions imposed pursuant to the Plan expire or shall have been removed.

(e) The Committee may make such provisions as it may deem appropriate for the withholding or payment by the Employee of any withholding taxes which it determines are required in connection the lapse of Forfeiture Restrictions and/or vesting or settlement of Restricted Stock Units, and an Employee’s rights in any Incentive Award are subject to satisfaction of such

conditions. If permitted by the Committee, the Employee may elect to satisfy all or any portion of such taxes by instructing the Company to withhold shares of Jacobs Common Stock as to which the restrictions have lapsed or that otherwise would have been issued in settlement of the Incentive Award.

(f) If shares of Jacobs Common Stock are withheld to satisfy tax liabilities, the value of such shares shall be computed using the Fair Market Value of the Jacobs Common Stock on the date the tax liability arises.

(g) All of the foregoing restrictions, terms and other conditions regarding awards of Restricted Stock and Restricted Stock Units shall be evidenced by a written agreement between the Company and the Employee and containing such terms and conditions, not inconsistent with the Plan, as the Committee shall approve.

(h) Schedule B, attached hereto, establishes the effects on outstanding awards of Restricted Stock and Restricted Stock Units of an Employee’s termination of employment, other changes of employment or employer status, death, Disability, Retirement, or a Change in Control, and is hereby incorporated by reference. The Committee may approve grants of Restricted Stock and Restricted Stock Units containing terms and conditions different from, or in addition to, those set forth in Schedule B.”

6. Paragraph 14(c) of the Plan is hereby deleted in its entirety and replaced with the following:

“Grants of ISOs may be made under this Plan until January 22, 2019 or such earlier date as this Plan is terminated, and grants of NQSOs and awards of Restricted Stock and Restricted Stock Units may be made until all of the shares of Jacobs Common Stock authorized for issuance hereunder (adjusted as provided in Sections 5 and 12) have been issued or until this Plan is terminated, whichever first occurs. The Plan shall terminate when there are no longer Options or Restricted Stock Units outstanding under the Plan, or when there are no longer shares of Restricted Stock outstanding that are subject to Forfeiture Restrictions, unless earlier terminated by the Board or by the Committee.”

“ SCHEDULE B

to the

JACOBS ENGINEERING GROUP INC.

Exhibit 10.2

JACOBS ENGINEERING GROUP INC.

RESTRICTED STOCK UNIT AGREEMENT

(Market Stock Units)

This Agreement is executed as of this      day of          20      by and between JACOBS ENGINEERING GROUP INC. (the “Company”) and                      (“Employee”) pursuant to the Jacobs Engineering Group Inc. 1999 Stock Incentive Plan (the “Plan”). Unless the context clearly indicates otherwise, capitalized terms used in this Agreement, to the extent they are defined in the Plan, have the same meaning as set forth in the Plan.

Pursuant to the Plan, and in consideration for services rendered to the Company or for its benefit, the Company hereby issues, as of the above date (the “Award Date”) to Employee an award of restricted stock units in accordance with Paragraph 13 of the Plan and the terms and conditions of this Agreement (the “Award”). The target number of restricted stock units Employee is eligible to earn under this Agreement is                      (the “Target Restricted Stock Units”). Each restricted stock unit represents the right to receive one share of Jacobs Common Stock (subject to adjustment pursuant to the Plan) in accordance with the terms and subject to the conditions (including the vesting conditions) set forth in this Agreement and the Plan.

Notwithstanding any other provision of the Plan or this Agreement to the contrary, the Plan and this Agreement shall be construed or deemed to be amended as necessary to comply with the requirements of Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”), to avoid the imposition of any additional or accelerated taxes or other penalties under Section 409A of the Code. The Committee, in its sole discretion, shall determine the requirements of Section 409A of the Code applicable to the Plan and this Agreement and shall interpret the terms of each consistently therewith. Under no circumstances, however, shall the Company have any liability under the Plan or this Agreement for any taxes, penalties or interest due on amounts paid or payable pursuant to the Plan and/or this Agreement, including any taxes, penalties or interest imposed under Section 409A of the Code.

Employee shall have no rights as a stockholder (including, without limitation, any voting rights or rights to receive dividends with respect to the shares of Jacobs Common Stock subject to the Award) with respect to either the Award granted hereunder or the shares of Jacobs Common Stock underlying the Award, unless and until such shares are issued in respect of Vested Units, and then only to the extent of such issued shares.

The payment of withholding taxes, if any, due upon the settlement of the Award may, at the discretion of the Committee, be satisfied by instructing the Company to withhold from the shares of Jacobs Common Stock otherwise issuable upon settlement of the Award that number of shares having a total Fair Market Value equal to the amount of income and withholding taxes due as determined by the Company. Under no circumstances can the Company be required to withhold from the shares of Jacobs Common Stock that would otherwise be delivered to Employee upon the settlement of the Award a number of shares having a total Fair Market Value that exceeds the amount of withholding taxes due as determined by the Company at the time the Award vests. Employee acknowledges and agrees that the Company may delay the delivery of the shares of Jacobs Common Stock that would otherwise be delivered to Employee upon settlement of the Award until Employee has made arrangements satisfactory to the Company to satisfy any tax withholding obligations of Employee.

Nothing contained in this Agreement or the Plan constitutes an employment or service commitment by the Company, affects the Employee’s status as an employee at will who is subject to termination without cause, confers upon the Employee any right to remain employed by or in service to the Company, interferes in any way with the right of the Company at any time to terminate such employment or services, or affects the right of the Company to increase or decrease the Employee’s other compensation or benefits. Nothing in this paragraph, however, is intended to adversely affect any independent contractual right of the Employee without his consent thereto.

This Agreement is governed in all respects by the Plan and applicable law. In the event of any inconsistency between the terms of the Plan and this Agreement, the terms of the Plan shall prevail. All terms defined in the Plan and used in this Agreement (whether or not capitalized) have the meanings as set forth in the Plan. Subject to the limitations of the Plan, the Company may, with the written consent of Employee, amend this Agreement. This Agreement shall be construed, administered and enforced according to the laws of the State of California.

By signing below, Employee (1) agrees to the terms and conditions of this Agreement, (2) confirms receipt of a copy of the Plan and all amendments and supplements thereto, and (3) appoints the officers of the Company as Employee’s true and lawful attorney-in-fact, with full power of substitution in the premises, granting to each full power and authority to do and perform any and every act whatsoever requisite, necessary, or proper to be done, on behalf of Employee which, in the opinion of such attorney-in-fact, is necessary to effect the forfeiture of the Award to the Company, or the delivery of the Jacobs Common Stock to Employee, in accordance with the terms and conditions of this Agreement.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the date set forth above.

Exhibit 10.3

JACOBS ENGINEERING GROUP INC.

RESTRICTED STOCK AGREEMENT

(Awarded Pursuant to the 1999 Stock Incentive Plan)

This Agreement is executed as of               , 20      , by and between JACOBS ENGINEERING GROUP INC. (the “Company”) and                      (“Employee”) pursuant to the Jacobs Engineering Group Inc. 1999 Stock Incentive Plan (the “Plan”). Unless the context clearly indicates otherwise, capitalized terms used in this Agreement, to the extent they are defined in the Plan, have the same meaning as set forth in the Plan.

Pursuant to the Plan, and in consideration for services rendered to the Company or to a Related Company, or for its benefit, the Company hereby issues, as of the above date (the “Award Date”) to Employee          shares of common stock of the Company (the “Restricted Stock”).

The certificates evidencing the Restricted Stock to Employee hereunder shall contain the following legend:

“THE SHARES EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON TRANSFER AND THE OBLIGATION OF THE HOLDER OF THIS CERTIFICATE TO FORFEIT AND SURRENDER THE SHARES EVIDENCED BY THIS CERTIFICATE TO THE COMPANY UNDER CERTAIN CIRCUMSTANCES AS SET FORTH IN THE RESTRICTED STOCK AGREEMENT BETWEEN THE COMPANY AND THE REGISTERED HOLDER OF THIS CERTIFICATE, A COPY OF WHICH MAY BE OBTAINED FROM THE HOLDER OR AT THE PRINCIPAL OFFICE OF THE COMPANY.”

In addition, the Company may place such additional legends on such certificates as may be required by law and may place a stop transfer order on such certificates on the records of the transfer agent for the shares of the Company.

In order to enforce the Forfeiture Restrictions, the Company shall retain possession of the certificates evidencing the Restricted Stock so long as the Forfeiture Restrictions are in effect. When the Forfeiture Restrictions shall have expired as to any of the Restricted Stock, the Company will deliver the certificates for such shares to Employee.

The payment of withholding taxes, if any, due upon the lapsing of the Forfeiture Restrictions may be satisfied by instructing the Company to withhold from the shares of Jacobs Common Stock as to which the Restrictions have lapsed that number of shares having a total value equal to the amount of income and withholding taxes due as determined by the Company. Any shares so withheld shall be valued at their Fair Market Value. Under no circumstances can the Company be required to withhold from the shares of Jacobs Common Stock that would otherwise be delivered to the Employee upon the lapsing of the Forfeiture Restrictions a number of shares having a total value that exceeds the amount of withholding taxes due as determined by the Company at the time the Forfeiture Restrictions lapse. Employee acknowledges and agrees that except as provided in Paragraph 10, the Company may delay the delivery of shares of Jacobs Common Stock that would otherwise be delivered to the Employee upon the lapsing of the Forfeiture Restrictions until the Employee has made arrangements satisfactory to the Company to satisfy the tax withholding obligations of the Employee.

Employee shall have the right to vote the Restricted Stock and to receive cash dividends thereon unless and until Employee forfeits any or all of such shares to the Company pursuant to the provisions of this Agreement. Any shares issued pursuant to a stock split or stock dividend with respect to the Restricted Stock shall be retained by the Company so long as the Forfeiture Restrictions are in effect and shall be subject to such Forfeiture Restrictions but shall be considered to have been issued on the Award Date.

Employee shall not be deemed to have ceased to be employed by the Company (or any Related Company) for purposes of this Agreement by reason of Employee’s transfer to a Related Company (or to the Company or to another Related Company).

The Committee may determine that, for purposes of this Agreement, Employee shall be considered as still in the employ of the Company or of the Related Company while on leave of absence. In the event Employee is permitted a leave of absence during the term of this Agreement, the Committee may, in its sole and absolute discretion, extend the time periods during which the Restricted Stock is subject to the Forfeiture Restrictions as set forth in Paragraph 2, above, to include the period of time Employee is on the leave of absence.

This Agreement is governed in all respects by the Plan and applicable law. In the event of any inconsistency between the terms of the Plan and this Agreement, the terms of the Plan shall prevail. All terms defined in the Plan are used in this Agreement (whether or not capitalized) as so defined. Subject to the limitations of the Plan, the Company may, with the written consent of Employee, amend this Agreement. Neither the grant nor award of an Incentive Award under the Plan constitutes an agreement of employment between the Employee and the Company or a Related Company. The receipt of an Incentive Award does not constitute a right acquired by the recipient to any other form of compensation, or to any future benefit or compensation, or to participate in any other benefit plan or program sponsored by the Company or Related Company, or to receive additional Incentive Awards under the Plan in the future. This Agreement shall impose no obligation on the Company or any of its Related Companies to employ Employee for any period. This Agreement shall be construed, administered and enforced according to the laws of the State of California.

It is intended that the award of Restricted Stock pursuant to this Agreement shall not constitute a “deferral of compensation” within the meaning of Section 409A of the Code and, as a result, shall not be subject to the requirements of Section 409A. The Agreement is to be interpreted in a manner consistent with this intention. Notwithstanding any other provision in this Agreement, the Agreement may not be modified in a manner that would cause the award of Restricted Stock to become subject to Section 409A of the Code.

By signing below, Employee: (1) agrees to the terms and conditions of this Agreement; (2) confirms receipt of a copy of the Plan and all amendments and supplements thereto; and (3) appoints the Secretary of the Company and each Assistant Secretary of the Company as Employee’s true and lawful attorney-in-fact, with full power of substitution in the premises, granting to each full power and authority to do and perform any and every act whatsoever requisite, necessary, or proper to be done, on behalf of Employee which, in the opinion of such attorney-in-fact, is necessary to effect the forfeiture of the Restricted Stock to the Company, or the delivery of the Jacobs Common Stock to Employee, in accordance with the terms and conditions of this Agreement.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the date set forth above.