Document:

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                                                                    EXHIBIT 10.7

                         AECOM TECHNOLOGY CORPORATION

                              STOCK PURCHASE PLAN

                         RESTATED AS OF APRIL 7, 1999
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                         AECOM TECHNOLOGY CORPORATION
                              STOCK PURCHASE PLAN

                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<CAPTION>
Article    Heading                                                        Page
-------    -------                                                        ----
<S>        <C>                                                            <C>
ONE        Scope of Plan and Definitions.................................  1

TWO        Participation and Credits.....................................  4

THREE      Payment of Benefits...........................................  8

FOUR       Administration of Plan........................................ 11

FIVE       Amendment and Termination..................................... 12

SIX        Miscellaneous Provisions...................................... 13
</TABLE>

                                       i
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                                  ARTICLE ONE
                                  -----------

                         Scope of Plan and Definitions
                         -----------------------------

1.1  Purpose and Scope of Plan
     -------------------------

     The AECOM Technology Corporation Stock Purchase Plan ("Plan") is effective
     as of June 1, 1991, and has been restated as of April 7, 1999.  The purpose
     of the Plan is to provide certain Employees and Directors of the Company
     with the opportunity to invest compensation deferral contributions in units
     of common stock of the Company.

1.2  Terms Defined in the Qualified Plans
     ------------------------------------

     For all purposes of this Plan, capitalized terms, unless defined herein,
     shall have the meanings specified in the Qualified Plans, unless a
     different meaning is plainly required by the context.

1.3  Definitions
     -----------

     As used in the Plan, the following capitalized terms have the meanings set
     forth below, unless a different meaning is plainly required by the context.

     (a)  "Accounts" means Participants' Supplemental Compensation Deferral
          Accounts and Additional Credits Accounts.  These accounts are unfunded
          bookkeeping accounts which are credited with amounts as provided in
          Article Two.

     (b)  "AECOM ESOP" means the AECOM Technology Corporation Employee Stock
          Ownership Plan as in effect on the date hereof and as such plan may be
          amended from time to time.

     (c)  "Beneficiary" means the beneficiary or beneficiaries designated by a
          Participant under the AECOM ESOP.  A Director who is a Participant
          shall designate a beneficiary or beneficiaries under this Plan in the
          form and manner prescribed by the Committee.

     (d)  "Board" means the Board of Directors of AECOM Technology Corporation.

     (e)  "Committee" means a committee appointed by the Board to administer the
          Plan, and any successor committee of the Board with similar functions,
          and shall consist of two or more members (or such greater number as

                                       1
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          may be required under applicable law) each of whom shall, to the
          extent required by applicable law, be "disinterested" within the
          meaning of applicable regulatory requirements, including those
          promulgated under Section 16 of the Securities Exchange Act of 1934
          (the "Act").  The Board may at any time take action under the Plan in
          place of the Committee, provided that a majority of the members of the
          Board shall, to the extent required by applicable law, be
          "disinterested" (within the meaning set forth above) when taking such
          action.

     (f)  "Company" means AECOM Technology Corporation.

     (g)  "Compensation" means compensation as defined in the Qualified Plans
          modified by including compensation deferral contributions under this
          Plan and by ignoring the $200,000 limitations on compensation under
          Section 401(a)(17) of the Code.

     (h)  "Director" means a person who is a member of the Board and who is not
          an Eligible Employee. For purposes of this Plan, a Director shall be
          treated as having terminated employment with the Company on the date
          he or she ceases to be a Director.

     (i)  "Eligibility Date" means May 31 in the case of the 1994 Plan Year and
          January 1 of any subsequent Plan Year, provided that in the case of an
          individual who is not yet eligible to make deferrals under the
          Qualified Plans, Eligibility Date shall be the first date on which
          Employee is eligible to make a deferral election under the Qualified
          Plans for a Plan Year.  Notwithstanding the foregoing, in the case of
          a Director, "Eligibility Date" means June 1 in the case of the 1995
          Plan Year and January 1 of any subsequent Plan Year, provided that in
          the case of a new Director, Eligibility Date shall be the date of
          election to the Company's Board of Directors.

     (j)  "Eligible Employee" means for any Plan Year any Employee of the
          Company or a Participating Employer who (i) is eligible to elect Tax
          Deferred Contributions or After Tax Contributions under the Qualified
          Plans, and (ii) is expected to be a Highly Compensated Employee of the
          Company or of a Participating Employer for the Plan Year of the
          Qualified Plans ending with or within the Plan Year.  Eligible
          Employee shall also include for any Plan Year any other employee of a
          foreign subsidiary, 80% of which is owned in the aggregate by the
          Company and Participating Companies provided that (i) such employee
          would be expected to be a Highly Compensated Employee were the
          employee employed by a Participating Employer, and (ii) such employee
          is selected by the

                                       2
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          Committee after the Committee determines that applicable foreign law
          permits such employee to participate in the Plan.

     (k)  "Participant" means an Eligible Employee or Director who has an
          Account under this Plan.

     (l)  "Participating Employer" means the Company and any other employer that
          is participating in the Qualified Plans.

     (m)  "Plan" means the AECOM Technology Corporation Stock Purchase Plan as
          set forth herein, effective as of June 1, 1991.

     (n)  "Plan Year" means each calendar year.

     (o)  "Qualified Plans" means the AECOM Technology Corporation 401K Pension
          Plan and Investment Plan and the AECOM Technology Corporation Stock
          Investment Plan, as in effect on the date hereof, and as each may be
          amended from time to time.

     (p)  "Supplemental Compensation Deferral Account" means the separate
          account, if any, established for each Participant pursuant to Sections
          2.2(a) and 2.2(b) of this Plan.

1.4  Other Definitional Provisions
     -----------------------------

     The terms defined in Sections 1.2 and 1.3 of the Plan shall apply equally
     to both singular and plural.  The masculine pronoun, whenever used, shall
     include the feminine.  When used in the Plan, the words "hereof" "herein"
     and "hereunder" and words of similar import shall refer to the Plan as a
     whole and not to any particular provision of the Plan, unless otherwise
     specified.

                                       3
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                                  ARTICLE TWO
                                  -----------

                           Participation and Credits
                           -------------------------

2.1  Participation
     -------------

     (a)(i) An Eligible Employee may irrevocably authorize the pre-tax deferral
               (in whole percentages up to 15% for any payroll period) of cash
               Compensation under this Plan. Notwithstanding any provision of
               the Plan to the contrary, the authorization of an Eligible
               Employee to make deferrals under this Section 2.1(a)(i) shall
               only apply, and deferrals shall only be made, during periods when
               the Company determines that the Eligible Employee may not make
               tax deferred contributions to the Qualified Plans because of one
               or more of the following limits: (1) the discrimination tests
               under Section 401(k) and (m) of the Code, (2) the limitations on
               tax deferred contributions to qualified plans under Section
               402(g) of the Code, (3) the limitation on compensation taken into
               account in qualified plans under Section 401(a)(17) of the Code,
               or (4) any rule imposed by the Company (as administrator of the
               Qualified Plans) designed to meet any of the foregoing limits,
               which rule may be imposed by considering all Eligible Employees
               in the aggregate for purposes of meeting one or more of such
               limits. Such authorization shall continue until the Company
               determines that such Eligible Employee may again make tax
               deferred contributions to the Qualified Plans.

     (ii)      In addition to deferrals permitted under Section 2.1(a)(i), an
               Eligible Employee may also irrevocably authorize pre-tax
               contributions (in whole percentages up to 100%) of any
               Compensation paid in the form of the Company's Common Stock in
               lieu of cash or other incentive Compensation and/or a combination
               of these forms of compensation, whether such Compensation is paid
               at the direction of the Company or at the election of the
               Eligible Employee. Such authorization under this Section
               2.1(a)(ii) shall commence on the Eligible Employee's Eligibility
               Date.

                                       4
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     (iii)  A Director may irrevocably authorize the pre-tax deferral of all or
               any part of any director's fees or meeting fees that the Director
               is entitled to receive from the Company.

     (iv)   To be effective, the authorization of any Eligible Employee under
               Section 2.1(a)(i) or (ii), or of any Director under Section
               2.1(a)(iii), must be submitted to the Committee on the
               appropriate enrollment form before the Eligible Employee's or
               Director's Eligibility Date for the Plan Year and before each
               Plan Year thereafter. Notwithstanding Section 2.1(a)(i) or (ii),
               such authorization will not continue in effect after the earlier
               of: (1) the date on which the Participant receives a hardship
               withdrawal under the Qualified Plans, (2) the date the
               Participant terminates employment with the Company or (3) the end
               of the Plan Year. In addition, an Eligible Employee who receives
               a hardship withdrawal under either of the Qualified Plans may not
               make deferrals under this Section 2.1(a) or be entitled to
               allocations under Section 2.2 until the Plan Year which commences
               at least one year after the hardship withdrawal.

     (iv)      Participants shall be entitled to credits to a Supplemental
               Compensation Deferral Account pursuant to Section 2.2 for amounts
               the Participant elects to have contributed on a pre-tax basis.

     (b)   An Eligible Employee or Director shall become a Participant under
           this Plan when an Account on his behalf is first credited hereunder.

2.2  Credits to Supplemental Compensation Deferral Account
     -----------------------------------------------------

     (a)   Deferrals authorized to be credited on behalf of a Participant
           pursuant to Section 2.1(a) above shall be credited by the
           Participating Company to the Participant's Supplemental Compensation
           Deferral Account. Such credits shall be made as of the date on which
           the amount being credited would have been paid to the Participant,
           but for the authorization of the Participant under Section 2.1(a).

     (b)   In addition to the crediting deferrals authorized pursuant to Section
           2.1(a), the Company may credit to the Participant's (or Eligible
           Employee's, if the person is not already a Participant) Supplemental
           Compensation Deferral Account any additional cash amounts or Common
           Stock Units which the Company has determined, for any reason, to
           credit to such Participant.

                                       5
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     (c)   In addition, effective October 1, 1998, the Company will credit the
           Additional Credits Account of each Participant (or Eligible Employee,
           if the person is not already a Participant) with additional cash
           amounts or Common Share Units (as the Company elects) equal to the
           value of the amounts that are not allocated to the Eligible
           Employee's account under the AECOM ESOP (excluding amounts not
           allocated under Section 6.4 or 6.4A for the 1998 Plan Year) or the
           Pension 401K Matching Accounts under the 401K Pension Plan and
           Investment Plan due to the application of (i) the limits on
           contributions and other annual additions under Section 415 of the
           Code and/or (ii) the nondiscrimination rules under Code Section
           410(m) (as applied to matching contributions, but not after tax
           contributions) or 401(a) (4). No additional credits shall be made (i)
           to reflect amounts not allocated due to any other reason, including
           without limitation to Code Section 401(a) (17) or (ii) to reflect any
           amount not contributed due to any limits on 401(k) contributions to
           the Qualified Plans. All such credits shall be made on the last day
           of the Plan Year.

2.3  Accounts and Interest Equivalents
     ---------------------------------

     (a)   Participants' Accounts.  The Company shall establish an unfunded
           ----------------------
           bookkeeping account for each Participant to determine the amount
           payable on behalf of the Participant under the Plan.

     (b)   Common Stock Units.  Cash amounts credited to each Participant's
           ------------------
           Account under the Plan shall be converted into a number of Common
           Stock Units by dividing the cash amount in each Account by the fair
           market value of a share of Common Stock of the Company. For this
           purpose, cash amounts credited to a Participant's Account shall be
           converted to Common Stock Units based on the valuation of stock
           performed in accordance with the terms of the Qualified Plans which
           coincides with or immediately follows the date such cash amounts are
           credited to the Participant's Account.

     (c)   Dividends.  At any time that the Company issues a cash or stock
           ---------
           dividend with regard to its Common Stock, an amount shall be credited
           to each Participant's Account under the Plan equal to the dividends
           that would be payable if the Common Stock Units in the Participant's
           Account constituted outstanding shares of Common Stock of the
           Company. Amounts so credited to Participants' Accounts shall be
           converted into Common Stock Units in accordance with the provisions
           of Section 2.3(b).

     (d)   Adjustments.  If the outstanding shares of the Company's Common Stock
           -----------
           are increased, decreased or changed into, or exchanged for, a
           different number or kind of shares or securities of the Company
           through a

                                       6
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           reorganization or merger in which the Company is the surviving
           entity, or through a combination, recapitalization, reclassification,
           stock split, stock dividend, stock consolidation or otherwise, an
           appropriate adjustment shall be made in the number and kind of Share
           Units that are credited to each Participant's Account under the Plan.

     (e)   Statements. Each Participant shall receive a statement of the balance
           ----------
           in his or her Account at least annually.

2.4  Vesting
     -------

     Each Participant shall be one hundred percent vested, at all times, in the
     value of his Supplemental Compensation Deferral Account. Each Participant
     shall be one hundred percent vested in the value of his Additional Credits
     Account when he becomes one hundred percent vested in the AECOM ESOP and
     shall be zero percent vested until such time.

                                       7
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                                 ARTICLE THREE
                                 -------------

                              Payment of Benefits
                              -------------------

3.1  Commencement and Form of Payment
     --------------------------------

     (a)  Time for Payment.
          ----------------

               As soon as practicable following each Participant's termination
          of employment with the Company, the Participating Employer shall pay
          to such Participant, or, if such Participant is not living at the time
          for payment, to such Participant's Beneficiary, the value of the
          Participant's vested Account. An Eligible Employee who terminates
          employment with the Company shall be treated under the Plan as a
          terminated Eligible Employee without regard to whether he or she
          becomes a Director upon or after ceasing to be an Eligible Employee. A
          Director shall be deemed to have reached his Retirement Date on the
          date that he ceases to be a director.

     (b)  Method of Payment.
          -----------------

               Unless otherwise determined by the Committee, payments of a
          Participant's Account shall be made in actual shares of Common Stock
          of the Company in a number equal to the number of Share Units then
          payable, with any fractional Share Units to be settled by a cash
          payment. Any shares distributed from this Plan shall be subject to any
          put, call or other option or buy-sell or similar arrangement which
          applies to such shares in accordance with the Certificate of
          Incorporation or Bylaws of the Company, and any repurchases shall be
          subject to any repurchase limitations set forth therein or in rules
          similar to Appendix C of the AECOM Stock Investment Plan, so that no
          repurchase shall be made which would result in the violation of any
          covenant or agreement of the Company. For purposes of determining the
          priority of repurchases under this Plan, Directors shall be treated as
          Employees of the Company. For this purpose, no repurchases under this
          Plan shall be made for a Plan Year until all repurchases of the
          Company's Stock have been made under the AECOM ESOP and the Qualified
          Plans with respect to the Plan Year of the Qualified Plans ending
          within such Plan Year.

     (c)  Alternative Method of Payment.
          -----------------------------

                                       8
<PAGE>

               In lieu of the method of payment described in Section 3.1(b)
          above, the Committee, in its discretion, may convert the Share Units
          in a Participant's Account to a cash book account entry, determined as
          though the Share Units were shares of Common Stock owned by the
          Participant on the date of termination of employment, and based on the
          valuation of Common Stock performed in accordance with the terms of
          the Company's Bylaws. The Committee may pay such amount to the
          Participant (i) in cash in a single sum, or (ii) in five annual
          payments of 20% of the principal amount of the Participant's Account
          plus accrued but unpaid interest at the rate described under Section
          6.10 of the Bylaws of the Company for the repurchase of shares of the
          Company with a promissory note. Alternatively, in lieu of such five
          annual payments, such Participant may elect for the Corporation to
          make five annual conversions of the Share Units in the Participant's
          Account to cash book account entries, which shall commence within 90
          days after the end of the fiscal year in which occurs the
          Participants's Retirement Date, death or Break in Service. The first
          such conversion shall equal one-fifth of the Participant's Share
          Units; the second such conversion shall equal one-fourth of the
          Participant's remaining Share Units; the third such conversion shall
          equal one-third of the Participant's remaining Share Units; the fourth
          such conversion shall equal one-half of the Participant's remaining
          Share Units; and the fifth such conversion shall equal the balance of
          the Participant's Share Units. As used herein, the term "Break in
          Service" means a fiscal year during which the Participant has not
          completed more than 500 Hours of Service; the term "Hours of Service"
          means the Participant's hours of service as provided in Section 2.22
          of the AECOM ESOP); and the term "Retirement Date" means the date of a
          Participant's Normal Retirement Date, Deferred Retirement Date, or
          Disability Retirement Date, as provided in Article VIII of the AECOM
          ESOP. Alternatively, in lieu of such five annual payments, such
          Participant may elect for the Corporation to make ten annual
          conversions of the Share Units in the Participant's Account to cash
          book account entries, which shall commence within 90 days after the
          end of the fiscal year in which occurs the Participants's Retirement
          Date, death or Break in Service. The first such conversion shall equal
          one-tenth of the Participant's Share Units; the second such conversion
          shall equal one-ninth of the Participant's remaining Share Units; the
          third such conversion shall equal one-eighth of the Participant's
          remaining Share Units; the fourth such conversion shall equal one-
          seventh of the Participant's remaining Share Units; the fifth such
          conversion shall equal one-sixth of the Participant's remaining share
          Units; the sixth such conversion shall equal one-fifth of the
          Participant's Share Units; the seventh such conversion shall equal
          one-fourth of the Participant's remaining Share Units; the eighth such
          conversion shall equal one-third of the Participant's remaining Share
          Units; the ninth such conversion shall equal one-half of

                                       9
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          the Participant's remaining Share Units; and the tenth such conversion
          shall equal the balance of the Participant's Share Units. The
          Corporation may accelerate such conversions at any time. Each cash
          book account entry shall be determined as though the Share Units were
          shares of Common Stock owned by the Participant at the end of the
          fiscal year immediately preceding the conversion date and shall be
          based on the valuation of Common Stock performed in accordance with
          the terms of the Company's Bylaws. Each such converted amount shall be
          paid promptly, in cash. If any amounts credited to a Participant's
          Supplemental Compensation Deferral Account under Section 2.1(a) are or
          will be distributed pursuant to this Section 3.1(c) (the "First
          Distribution"), any additional amounts credited to the Participant in
          accordance with Section 2.2(b) (the "Subsequent Distribution") will be
          distributed at the same time and in the same manner as the First
          Distribution; provided that no special distribution provision is
          contained in the award of such amounts under Section 2.2(b). If at the
          date for commencement of the Subsequent Distribution, the First
          Distribution has already commenced, the Subsequent Distribution will
          be divided into a number of substantially equal installments of Share
          Units (or cash, if Share Units were not awarded to the Participant
          under Section 2.2(b)) that corresponds to the number of remaining
          installments to be paid under the First Distribution. Each such
          installment of the Subsequent Distribution will be paid at the same
          time and in the same manner as the corresponding installment of the
          First Distribution.

3.2  Loans and In-service Payments and Withdrawals
     ---------------------------------------------

     No Participant shall be allowed to borrow from the Plan.  No withdrawal or
     payment of benefits shall be allowed before a Participant terminates
     employment with the Company.

                                      10
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                                 ARTICLE FOUR
                                 ------------

                            Administration of Plan
                            ----------------------

4.1  Responsibilities and Powers of the Committee
     --------------------------------------------

     The Committee shall be solely responsible for the operation and
     administration of the Plan and shall have all powers described in the
     Qualified Plans with respect to this Plan, and such additional powers
     necessary and appropriate to carry out its responsibilities in operating
     and administering the Plan.  Without limiting the generality of the
     foregoing, subject to Section 2.2, the Committee shall have the
     responsibility and power to determine whether a dollar credit should be
     made on behalf of a Participant, the amount of the dollar credit, the
     number of Share Units into which such dollar credits are converted, and the
     Participant's vested interest in his Accounts.  The Committee shall have
     full discretion to construe and interpret the terms and provisions of this
     Plan, which interpretation or construction shall be final and binding on
     all parties, except as otherwise provided by law.

4.2  Outside Services
     ----------------

     The Committee may engage counsel and such clerical, financial, investment,
     accounting, and other specialized services as it may deem necessary or
     desirable to the operation and administration of the Plan.  The Committee
     shall be entitled to rely upon any opinions, reports, or other advice
     furnished by counsel or other specialists engaged for that purpose and, in
     so relying, shall be fully protected in any action, determination, or
     omission taken or made in good faith.

4.3  Indemnification
     ---------------

     The Company shall indemnify the Committee and each Committee member against
     any and all claims, losses, damages, expenses (including reasonable counsel
     fees), and liability arising from any action, failure to act, or other
     conduct in the member's official capacity, except when due to the
     individual's own gross negligence or willful misconduct.

4.4  Claims Procedure
     ----------------

     The claims procedure set forth in the Qualified Plans is incorporated
     herein by reference.

                                      11
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                                 ARTICLE FIVE
                                 ------------

                           Amendment and Termination
                           -------------------------

5.1  Amendment
     ---------

     The Company reserves the right at any time and from time to time, and
     retroactively if deemed necessary or appropriate, to modify or amend in
     whole or in part any or all of the provisions of the Plan.

5.2  Termination
     -----------

     The Plan is purely voluntary on the part of the Company.  The Company may
     terminate the Plan at any time.

5.3  Effect of Amendment or Termination
     ----------------------------------

     Any amendment, modification, or termination shall not reduce, alter, or
     impair any rights under the Plan as to amounts credited to the Accounts of
     Participants under the Plan as of the date of such amendment, modification
     or termination.  A Participating Employer shall pay its Participants the
     value of their respective accounts upon  termination of the Plan, in the
     manner prescribed herein.

                                      12
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                                  ARTICLE SIX
                                  -----------

                           Miscellaneous Provisions
                           ------------------------

6.1  Source of Payments
     ------------------

     The Plan shall not be funded and all payments hereunder to Participants or
     Beneficiaries shall be paid from the general assets of each Participating
     Employer, except to the extent paid by the Trust provided for below.  No
     Participating Employer shall, by virtue of any provisions of the Plan or by
     any action of any person, be deemed to be a trustee or other fiduciary of
     any property for any Participant or Beneficiary, and the liabilities of
     each Participating Employer to any Participant or Beneficiary pursuant to
     the Plan shall be those of a debtor pursuant only to such contractual
     obligations as are created by the Plan; no such obligation of a
     Participating Employer shall be deemed to be secured by any pledge or other
     encumbrance on any property of such Participating Employer.  To the extent
     that any Participant or Beneficiary acquires a right to receive payment
     from a Participating Employer under the Plan, such right shall be no
     greater than the right of an unsecured general creditor of the
     Participating Employer.  Notwithstanding the foregoing, the Company may
     create and fund a "rabbi trust" (the "Trust") with respect to this Plan.
     The creation and funding of said Trust shall not create a security interest
     in the property of such Trust in favor of Participants or Beneficiaries or
     otherwise cause a funding of the Plan or Trust in any manner inconsistent
     with the preceding paragraph or Section 6.8.  The amount of any
     contributions to such Trust shall be totally discretionary as determined by
     the Company.  Any amount paid from such Trust to the Participant shall
     reduce the amount to be paid pursuant to this Plan by the Participating
     Employer.  In the event the amounts paid from the Trust are insufficient to
     provide the full benefits payable to the Participant under this Plan, the
     Participating Employer shall pay the remainder of such benefit in
     accordance with the terms of this Plan.

     It is the intention of the Participating Employers that this Plan and Trust
     be considered unfunded for purposes of the Code and Title 1 of ERISA.

6.2  General Provisions
     ------------------

     (a)  This Plan and the issuance or transfer of shares of Common Stock
          (and/or the payment of money) pursuant thereto are subject to all
          applicable Federal and state laws, rules and regulations, to the
          rights, preferences, limitations, and restrictions set forth in the
          Company's Certificate of Incorporation and Bylaws, and to such
          approvals by any regulatory or governmental agency (including without
          limitation "no action"

                                      13
<PAGE>

     positions of the Securities and Exchange Commission) which may, in the
     opinion of counsel for the Company, be necessary or advisable in connection
     therewith. Without limiting the generality of the foregoing, no shares
     shall be issued by the Company, nor cash payments made by the Company,
     unless and until all legal requirements applicable to the issuance or
     payment have, in the opinion of counsel to the Company, been complied with.
     In connection with any stock issuance or transfer, the person acquiring the
     shares shall, if requested by the Company, give assurances satisfactory to
     counsel to the Company in respect to such matters as the Company may deem
     desirable to assure compliance with all applicable legal requirements and
     the Company's Certificate of Incorporation and Bylaws.

(b)  The Committee may specify such provisions as it deems Appropriate for
     payment under the Plan upon the occurrence of any of the following events
     (each a "Corporate Event"):

     (i)   Approval by the stockholders of the Company of the dissolution or
           liquidation of the Company;

     (ii)  Approval by the stockholders of the Company of an agreement to merge
           or consolidate, or otherwise reorganize, with or into one or more
           entities which less than 50% of the outstanding voting securities of
           the surviving or resulting entity are, or are to be, owned by former
           stockholders of the Company (excluding from the term "former
           stockholders" a stockholder who is, or as a result of the transaction
           in question becomes, an "affiliate," as that term is used in the Act
           and the Rules promulgated thereunder, of any party to such merger,
           consolidation or reorganization); or

     (iii) Approval by the stockholders of the Company of the sale of
           substantially all of the Company's business and/or assets to a person
           or entity which is not a subsidiary.

           For purposes of this paragraph (b), the term "subsidiary" shall mean
           any corporation or other entity a majority or more of whose
           outstanding voting stock or voting power is beneficially owned
           directly or indirectly by the Company.

6.3  Inalienability of Benefits
     --------------------------

     No benefit payable under, or interest in, the Plan shall be subject in any
     manner to anticipation, alienation, sale, transfer, assignment, pledge,
     encumbrance, or

                                      14
<PAGE>

     charge, and any attempt to do so shall be void. Any such benefit or
     interest shall not in any manner be liable for or subject to garnishment,
     attachment, execution, or levy or liable for or subject to the debts,
     contract, liabilities, engagements, or torts of any Participant or
     Beneficiary. If the Committee finds that any Participant or Beneficiary has
     become bankrupt or that any attempt has been made to anticipate, alienate,
     sell, transfer, assign, pledge, encumber, or charge any benefit payable
     under, or interest in, the Plan, the Committee shall hold or apply such
     benefit or interest or any part thereof to or for the benefit of such
     Participant or Beneficiary.

6.4  Expenses
     --------

     Each Participating Employer shall pay all costs and expenses incurred in
     operating and administering the Plan attributable to that employer;
     provided that the Company may in its discretion pay some or all costs and
     expenses of a Participating Employer.

6.5  No Right of Employment
     ----------------------

     Nothing contained herein nor any action taken under the provisions hereof
     shall be construed as giving any Participant the right to be retained in
     the employ of any Participating Employer.

6.6  Withholding
     -----------

     Each Participating Employer shall withhold from any payment hereunder any
     required amount of income and other taxes.

6.7  Headings
     --------

     The headings of the sections in the Plan are placed herein for convenience
     of reference; in the case of any conflict, the text of the Plan, rather
     than such heading, shall control.

6.8  Construction
     ------------

                                      15
<PAGE>

     Except to the extent governed by federal law, the Plan shall be construed,
     regulated, and administered in accordance with the laws of the State of
     California.  If any provision shall be held by a court of competent
     jurisdiction to be invalid and unenforceable, the remaining provisions of
     this Plan shall continue to be fully effective.  To the extent that the
     Plan is subject to the provisions of the Employee Retirement Income
     Security Act of 1974, as amended, ("ERISA") it is intended to be an
     unfunded deferred compensation plan "for a select group of management or
     highly compensated employees."  It is also intended that the Plan
     constitute an excess plan, as defined by ERISA.  Each provision of the Plan
     shall be administered, interpreted and construed to carry out such
     intention, and any provision that cannot be so administered, interpreted
     and construed shall, to that extent, be disregarded.

          IN WITNESS WHEREOF, the Company has caused this Plan to be executed as
of the date first hereinabove written.

                                    AECOM TECHNOLOGY CORPORATION

                                    By: /s/ R. Keeffe Griffith
                                       ------------------------------

                                      16<PAGE>

                                                                   Exhibit 10.10

                         AECOM TECHNOLOGY CORPORATION

                   Amended and Restated Performance Unit Plan

1.   Purpose
     -------

     AECOM Technology Corporation (the "Corporation") has established this
     Performance Unit Plan (the "PUP") to further the long-term, profitable
     growth of the Corporation and its subsidiaries (collectively, the
     "Company") by offering a long-term incentive in addition to current
     compensation to key employees of the Company who will be largely
     responsible for such growth to the benefit of the Company's shareholders.
     It is expected that this PUP will encourage such employees to remain with
     the Company and will also encourage qualified persons to seek and accept
     employment with the Company.

2.   Stock Subject to this PUP
     -------------------------

     Any shares of Common Stock, par value $0.01 per share ("Common Stock"), of
     the Corporation used for purposes of this PUP may be in whole or in part,
     as the Board of Directors of the Corporation ("Board of Directors") may
     from time to time determine, authorized and unissued shares of Common Stock
     or issued shares of Common Stock reacquired by the Corporation.

                                       1
<PAGE>

3.   Administration
     --------------

     This PUP shall be administered by a committee (the "Committee") appointed
     by the Board of Directors to administer the PUP, and any successor
     committee of the Board of Directors with similar functions, and shall
     consist of two or more members (or such greater number as may be required
     under applicable law) each of whom shall, to the extent required by
     applicable law, be "disinterested" within the meaning of applicable
     regulatory requirements (including those promulgated under Section 16 of
     the Securities Exchange Act of 1934 which Act is hereinafter referred to as
     the "Act").  The Board of Directors may at any time take action under the
     PUP in place of the Committee, provided that a majority of the members of
     the Board of Directors shall, to the extent required by applicable law, be
     "disinterested" (within the meaning set forth above) when taking such
     action.

     Action of the committee with respect to the administration of this PUP
     shall be taken pursuant to a majority vote or the written consent of all of
     its members.  In the event action by the Committee is taken by written
     consent of all of its members, the action by the Committee shall be deemed
     to have been taken at the time specified in the consent or, if none is
     specified, at the time of the last signature.  The Committee may delegate
     administrative functions to individuals who are officers or employees of
     the Company.

                                       2
<PAGE>

     Subject to the express provisions of this PUP, the Committee shall have the
     authority to construe and interpret this PUP and any agreements defining
     the rights and obligations of the Company and each individual who receives
     awards under the PUP (a "Participant"), to further define the terms used in
     this PUP, to prescribe, amend and rescind rules and regulations relating to
     the administration of this PUP, to determine the duration and purposes of
     leaves of absence which may be granted to Participants without constituting
     a termination of their employment for purposes of this PUP and to make all
     other determinations necessary or advisable for the administration of this
     PUP.  The determinations of the Committee on the foregoing matters shall be
     conclusive.

     Any action taken by, or inaction of, the Corporation, any subsidiary, the
     board of Directors or the Committee relating to this PUP shall be within
     the absolute discretion of that entity or body and shall be conclusive and
     binding upon all persons.  No member of the Board of Directors or
     Committee, or officer of the Corporation or Subsidiary, shall be liable for
     any such action or inaction of the entity or body, of another person or,
     except in circumstances involving bad faith, of himself or herself.
     Subject only to compliance with the express provisions hereof, the Board of
     Directors and the Committee may act in their absolute discretion in matters
     related to this PUP.

                                       3
<PAGE>

4.   Eligibility
     -----------

     Officers and key employees of the Company shall be eligible to become
     Participants by receiving an award of performance units under the PUP.  A
     Participant may receive one or more awards of performance units as the
     Committee shall from time to time determine, and such determination may be
     different as to different Participants and may vary as to different awards.
     A director of the Company who is not also an officer or key employee of the
     Company shall not be eligible to receive an award.  Nothing contained in
     this PUP shall be construed to limit the right of the Company to grant
     performance units or other forms of incentive compensation otherwise than
     under this PUP.

     Nothing contained in this PUP (or in any documents related to this PUP or
     to awards) shall confer upon any Participant under the PUP any right to
     continue in the employ of the Company or constitute any contract or
     agreement of employment, or interfere in any way with the right of the
     Company to reduce such person's compensation or to terminate the employment
     of such Participant, with or without cause, but nothing contained in this
     PUP or any document related thereto shall affect any other contractual
     right of any Participant.

                                       4
<PAGE>

5.   Award of Performance Units
     --------------------------

     a.   Performance units awarded to a Participant shall be contingent upon
          future performance of the Company and/or of the Participant's division
          or company. The Committee shall establish the performance measures
          applicable to such performance and the time period over which such
          performance shall be measured. Such measures may include, but shall
          not be limited to, earnings before interest expense, taxes, and ESOP
          contributions; return on equity; cash flow; or return on investment.

          The performance measures determined by the Committee shall be
          established not later than ninety (90) days after the beginning of
          each performance period but may be subject to such later revisions as
          the Committee shall deem appropriate.

     b.   In determining the number of performance units to be awarded, the
          Committee may take into account a Participant's responsibility level,
          performance, potential, cash compensation level, incentive
          compensation awards and such other considerations as it deems
          appropriate. Each award shall be established in dollars and the number
          of performance units therein shall be based on the Employee's base
          salary on the date of the award. The original amount of any award
          shall not exceed

                                       5
<PAGE>

          200% of the Participant's base salary; the amount paid out upon
          meeting the performance measures shall not exceed the original amount
          of such award; and notwithstanding any other provisions of the PUP to
          the contrary, the total amount of actual payments under the PUP for
          each award period shall not exceed 4% of the Corporation's
          stockholders' equity at the end of the fiscal year coinciding with the
          last day of the award period. The actual payment to each Participant
          receiving an award for a performance period shall be reduced on a pro
          rata basis if necessary to comply with the foregoing limitation on
          total payments. An award of performance units may be reduced by the
          Committee if required to avoid the occurrence of an event of default
          under the Credit Agreement among AECOM Technology Corporation, Bank of
          America N.T. & S.A. and the other Banks listed therein, and dated
          March 2, 1994 (an event of default under such Agreement being
          hereinafter referred to as an "Event of Default"). An award which has
          been reduced pursuant to the preceding sentence may be reinstated at
          any time during the applicable performance period.

     c.   An award of performance units to a Participant shall terminate for all
          purposes if he does not remain continuously in the employ of AECOM
          Technology Corporation at all times during his performance period,
          except in the case of death or retirement under an AECOM Technology
          Corporation pension plan (including early

                                       6
<PAGE>

          retirement at the request of AECOM Technology Corporation), except as
          may otherwise be determined by the Committee under particular
          circumstances. A Participant (or his estate) whose employment was
          terminated because of death or retirement as aforesaid shall be
          entitled to receive a pro rata portion of the payment of his award
          based upon the portion of the performance period during which he was
          so employed, all as the Committee shall determine in each case.

     d.   Payment with respect to performance units will be made to Participants
          on a date or dates fixed by the Committee but commencing not earlier
          than four years after the start of the performance period established
          when such units were awarded. Payment shall be made in two equal
          annual installments and may be made wholly in cash, wholly in shares
          of Common Stock or partly in cash and partly in such shares, all at
          the discretion of the Committee. Cash payment of an award of
          performance units will not be made if notice of Default has been
          received or an Event of Default has occurred; payment in shares of
          Common Stock may, but need not, be made in such event. If the notice
          or Event of Default appears likely to be cured or waived in the near
          term, the AECOM Board of Directors may defer payment until the notice
          or Event of Default has been cured or waived.

                                       7
<PAGE>

          If payment of an award of performance units is to be made in cash or
          partly in cash, the amount of cash to be paid to a Participant on any
          payment date shall be the original dollar amount (or the part thereof
          determined by the Committee to be paid in cash) of such award,
          adjusted with respect to the meeting of the performance measures for
          such award.  If payment of an award of performance units is to be made
          in shares of Common Stock or partly in such shares, the number of
          shares of Common Stock to be delivered to a Participant on any payment
          date shall be determined by dividing the original dollar amount (or
          the part thereof determined by the Committee to be delivered in
          shares) of such award, adjusted with respect to the meeting of the
          performance measures for such award, by the fair market value of one
          share of Common Stock as determined for purposes of the Company's
          Stock Investment Plan, as of the valuation date coinciding with the
          last day of the performance period.

     e.   This PUP, the granting of awards under this PUP and the issuance or
          transfer of shares of Common Stock (and/or the payment of money)
          pursuant thereto are subject to all applicable Federal and state laws,
          rules and regulations and to such approvals by any regulatory or
          governmental agency (including without limitation "no action"
          positions of the Securities and Exchange Commission) which may, in the
          opinion of counsel for the Corporation, be necessary or advisable in
          connection therewith.

                                       8
<PAGE>

          Without limiting the generality of the foregoing, no awards may be
          granted under this PUP, and no shares shall be issued by the
          Corporation, nor cash payments made by the Corporation, pursuant to or
          in connection with any such award, unless and until, in each such
          case, all legal requirements applicable to the issuance or payment
          have, in the opinion of counsel to the Corporation, been complied
          with. In connection with any stock issuance or transfer, the person
          acquiring the shares shall, if requested by the Corporation, give
          assurances satisfactory to counsel to the Corporation in respect of
          such matters as the Corporation may deem desirable to assure
          compliance with all applicable legal requirements and the
          Corporation's Restated Certificate of Incorporation.

     f.   The Company shall have the right to deduct from any payment hereunder
          any amounts that Federal, state, local or foreign tax laws required to
          be withheld with respect to such payment but, in the alternative, the
          Participant may prior to the payment of any award, pay such amounts to
          the Company in cash or in shares of Common Stock (which shall be
          valued at their fair market value on the date of payment). There is no
          obligation under this PUP that any Participant be advised of the
          existence of the tax or the amount required to be withheld. Without
          limiting the generality of the foregoing, in any case where it
          determines that a tax is required to be withheld

                                       9
<PAGE>

          in connection with the issuance or transfer of shares of Common Stock
          under this PUP, the Company may, pursuant to such rules as the
          Committee may establish, reduce the number of such shares so issued or
          transferred by such number of shares as the Company may deem
          appropriate in its sole discretion to accomplish such withholding.
          Notwithstanding any other provision of this PUP, the Committee may
          impose such conditions on the payment of any withholding obligation as
          may be required to satisfy applicable regulatory requirements,
          including, without limitation, Rule 16b-3 promulgated by the
          Securities and Exchange Commission.

     g.   For purposes of this paragraph g, the term "Event" shall mean any of
          the following events:

          i)   Approval by the stockholders of the Corporation of the
               dissolution or liquidation of the Corporation;

          ii)  Approval by the stockholders of the Corporation of an agreement
               to merge or consolidate, or otherwise reorganize, with or into
               one or more entities which are not subsidiaries, as a result of
               which less than 50% of the outstanding voting securities of the
               surviving or resulting entity are, or are to be, owned by former
               stockholders of the Corporation (excluding from the term "former
               stockholders" a stockholder who is, or as a result of the

                                       10
<PAGE>

               transaction in question becomes, an "affiliate",  as that term is
               used  in the Act and the  Rules  promulgated  thereunder,  of any
               party to such merger, consolidation or reorganization); or

          iii) Approval by the stockholders of the Corporation of the sale of
               substantially all of the Corporation's business and/or assets to
               a person or entity which is not a Subsidiary.

          Upon the occurrence of an Event, the performance period shall be
          deemed terminated and the determination as to whether the performance
          targets have been achieved shall be made as of the end of the fiscal
          quarter immediately preceding the date of the Event.  In the event
          that the performance targets have been achieved, the Participant shall
          be entitled to a prorated portion of the performance units, which
          shall be determined by multiplying the number of performance units
          awarded by a fraction, the numerator of which is the number of days of
          the performance period which have elapsed prior to the date of the
          Event, and the denominator of which is the number of days in the total
          performance period.  Full payment of the prorated number of
          performance units shall be made, in cash, not later than 30 days after
          the date of the Event.

                                       11
<PAGE>

     For purposes of this paragraph g, the term "Subsidiary" shall mean any
     corporation or other entity a majority or more of whose outstanding voting
     stock or voting power is beneficially owned directly or indirectly by the
     Corporation.

6.   General Provisions
     ------------------

     a.   Amounts payable pursuant to an award under the PUP shall be paid only
          to the Participant or the Participant's legal representative or, in
          the event of the Participant's death, to the Participant's beneficiary
          or estate. Other than by will or the laws of descent and distribution,
          no benefit payable under, or interest in, this PUP shall be subject in
          any manner to anticipation, alienation, sale, transfer, assignment,
          pledge, encumbrance or charge and any such attempted action shall be
          void and no such benefit or interest shall be, in any manner, liable
          for, or subject to, debts, contract, liabilities, engagements or torts
          of any Participant. The Committee shall disregard any attempt at
          transfer, assignment or other alienation prohibited by the preceding
          sentence and shall pay or deliver such cash or shares of Common Stock
          in accordance with the provisions of this PUP.

     b.   No Participant or other person shall have any right, title or interest
          in any fund or in any specific asset

                                       12
<PAGE>

          (including shares of Common Stock) of the Company by reason of any
          award granted hereunder. There shall be no funding of any benefits
          which may become payable hereunder. Neither the provisions of this PUP
          (or of any documents related hereto), nor the creation or adoption of
          this PUP, nor any action taken pursuant to the provisions of this PUP
          shall create, or be construed to create, a trust of any kind or a
          fiduciary relationship between the Company and any Participant or
          other person. To the extent that a Participant or other person
          acquires a right to receive any benefit hereunder, such right shall be
          no greater than the right of any unsecured general creditor of the
          Company. Amounts payable under this PUP shall be paid from the general
          assets of the Corporation, and no special or separate fund or deposit
          shall be established and no segregation of assets shall be made to
          assure payment of such amounts. Nothing in this PUP shall be deemed to
          give any Participant any right to participate in this PUP except in
          accordance herewith.

     c.   This PUP and the documents evidencing awards and all other related
          documents shall be governed by, and construed in accordance with, the
          laws of the State of California. If any provision shall be held by a
          court of competent jurisdiction to be invalid and unenforceable, the
          remaining provisions of this PUP shall continue to be fully effective.

                                       13
<PAGE>

     d.   Notwithstanding anything contained herein to the contrary, any payment
          provided for herein in the form of Common Stock may, at the
          Committee's sole and absolute discretion, be paid in the form of
          credits to the Participant's Supplemental Salary Deferral Account
          under the Corporation's Stock Purchase Plan, in the form of Common
          Stock Uuits and, in such event, the term "Common Stock" as used
          throughout this PUP shall mean and include Common Stock Units.

7.   Term of PUP, Amendment and Termination
     --------------------------------------

     Unless previously terminated by the Board of Directors or the Committee,
     this PUP shall terminate at the close of business on the tenth anniversary
     of the adoption of the PUP, and no awards shall be granted under the PUP
     thereafter, but such termination shall not affect any award theretofore
     granted.

     The Board of Directors may, at any time, terminate or, from time to time,
     amend, modify or suspend this PUP (or any part thereof). In addition, the
     Committee may, from time to time, amend or modify any provision of this
     PUP. The Committee, with the consent of the Participant, may make such
     modifications of the terms and conditions of a Participant's award under
     the PUP as it shall deem advisable. No awards may be granted under the PUP
     during any suspension of the PUP or after its termination. The amendment,
     suspension or

                                       14
<PAGE>

     termination of this PUP shall not, without the consent of the Participant,
     alter or impair any rights or obligations pertaining to any awards granted
     under this PUP prior to such amendment, suspension or termination.

IN WITNESS WHEREOF, the Corporation has caused this Performance Unit Plan to be
executed as of the 2nd day of December, 1994.

                              AECOM TECHNOLOGY CORPORATION

                              By: /s/ Richard G. Newman
                                 ------------------------------------

                                       15
<PAGE>

                                                                       EXHIBIT B
                                                                       ---------

                                POLICY MEMORANDUM
                            Fiscal 1995 - Fiscal 1998
                            -------------------------

          The AECOM Technology Corporation Performance Unit Plan (the "PUP")
provides that selected employees of AECOM Technology Corporation and its
subsidiaries (the "Company") will be awarded performance units which are earned
if certain performance objectives are met over the performance period, which in
this case shall consist of fiscal 1995 through fiscal 1998 (the "Performance
Period"). Moreover, any Performance Period awards actually earned by the
participants as a group are subject to an aggregate payment limitation as
provided in the PUP.

          The actual value of each Performance Unit under this grant shall be
determined as of the end of the Performance Period by the Committee of the Board
that administers the PUP, taking into account the performance objectives set
forth in Exhibit I hereto. In the event any unusual or extraordinary events
occur or changes are made in AECOM's operations during the Performance Period,
the Committee has plenary authority to adjust these performance measurements,
either individually, or by groups of participants similarly situated, and may
elect in its sole discretion to do so without consultation or prior notice.
Payments under this grant shall be subject to deferral or reduction in
accordance with the provisions of the PUP. These provisions limit overall
payments under the PUP and restrict payment if a Notice of Default has been
received or an Event of Default has occurred.

          You will receive payment of the total value, as of the end of the
Performance Period, of the Performance Units awarded under this grant in two
equal annual installments in each of the two calendar years immediately
following the end of the Performance Period. Payment with respect to performance
units may be made wholly in cash, wholly in shares of Common Stock, or partly in
cash and partly in such shares, all at the discretion of the Committee. The
future value of your performance award is dependent upon the performance of the
Company.

          Under present Federal tax laws and regulations, payment of any award
earned under the PUP will be subject to taxation as ordinary income in the year
in which paid.

          Participation in the PUP does not assure your continued employment
with the Company. Your participation in the PUP confers no rights other than the
right to receive payment of the value of your Performance Units if the
performance objectives are met and if you remain an employee of the Company
throughout the Performance Period.

          Unless the Committee otherwise determines, you will be entitled to
receive your earned performance award only if you are

                                       1
<PAGE>

an employee of the Company throughout the Performance Period and the ensuing
two-year payout period. In the event of your death or normal retirement,
pursuant to the terms of a retirement plan maintained by the Company or a
subsidiary of the Company, or such other circumstances as may be specified by
the Committee, you will be entitled to a pro rata portion of the payment of any
award earned based upon the portion of the Performance Period during which you
were a full-time employee. In the event that your employment is terminated by
the Company after the end of the Performance Period, you will be entitled to
payment of your performance award. Your participation is also contingent upon
your continuing in your present position throughout the Performance Period. In
the event that your position changes prior to the end of the Performance Period,
an equitable apportionment will be made.

                                      -2-

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