Document:

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                                                                   Exhibit 10.13

                               AMENDMENT NUMBER 1
                                       TO
                              WILLBROS GROUP, INC.
                               DIRECTOR STOCK PLAN

         1.       Introduction. On April 16, 1996, the Board of Directors of
Willbros Group, Inc. (the "Company") adopted, and on May 21, 1996, the
stockholders of the Company approved, the Willbros Group, Inc. Director Stock
Plan (the "Plan").

                  The Plan provides for the automatic grant of non-qualified
stock options to "Eligible Directors" (i.e., non-employee directors) of the
Company. For purposes of the Plan, an "Eligible Director" means each member of
the Board who, on the date an option is granted under the Plan, is not a
salaried officer or employee of the Company or any of its subsidiaries.

         2.       Purpose. The sole purpose of this Amendment is to clarify
under the terms of the Plan when a director who is an employee of the Company
who later ceases to be a salaried officer or employee of the Company or any of
its subsidiaries becomes eligible as a non-employee director of the Company to
receive options under the Plan.

         3.       Amendment. In Section 2 of the Plan, the definition of
"Initial Grant Date" is deleted and the following definition of "Initial Grant
Date" is substituted therefor:

                  "'Initial Grant Date' means (a) the Initial Public Offering
                  Date, or (b) if later, (i) the date an Eligible Director is
                  initially elected or appointed to the Board or (ii) the date
                  on which a member of the Board who is not an Eligible Director
                  initially becomes an Eligible Director."

         4.       No Change. Except as specifically set forth herein, this
Amendment does not change the terms of the Plan.

         5.       Effective Date. This Amendment shall take effect and be
adopted as of January 1, 2002.

         Executed as of the 1st day of January, 2002.

ATTEST:                                   WILLBROS GROUP, INC.

 /s/  Dennis G. Berryhill                 By:  /s/  Larry J. Bump
-----------------------------------          -----------------------------------
Dennis G. Berryhill                            Larry J. Bump
Secretary                                      Chairman of the Board and
                                                  Chief Executive Officer<PAGE>
                                                                   Exhibit 10.22

                        SEPARATION AGREEMENT AND RELEASE

         THIS SEPARATION AGREEMENT AND RELEASE ("Agreement") is made and entered
into this 22st day of December, 2001, by and between WILLBROS USA, INC.
("Employer") and MELVIN F. SPREITZER ("Employee").

                                   WITNESSETH:

         WHEREAS, Employee is or was employed by Employer; and

         WHEREAS, Employee will retire or retired from his employment with
Employer effective December 31, 2001 ("Retirement Date"); and

         WHEREAS, Employer and Employee wish to achieve a final and amicable
resolution of all issues related to their employment relationship;

         NOW, THEREFORE, for and in consideration of the mutual covenants and
promises set forth below, as well as other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties agree as
follows:

1.       EMPLOYEE'S RETIREMENT. Employee and Employer confirm and agree that
         Employee is retiring or will retire from employment with Employer as of
         the Retirement Date and that the employment relationship which existed
         between Employee and Employer and/or any of Employer's affiliated
         companies will cease or ceased as of the Retirement Date. However,
         nothing contained herein, shall prevent or interfere with the ability
         of the parties to enter into future agreements for Employee to provide
         consulting services and advice to Employer or Employer's affiliates on
         an independent contractor basis ("Subsequent Agreement"). Except as
         provided in any Subsequent Agreement, all of Employer's obligations to
         Employee on or after the Retirement Date are set forth herein.
         Accordingly, except as otherwise provided herein or in a Subsequent
         Agreement, Employer shall have no further obligations whatsoever to
         Employee after the Retirement Date. Similarly, except as provided in
         any Subsequent Agreement, all of Employee's obligations to Employer on
         or after the Retirement Date are set forth herein. Accordingly, except
         as otherwise provided herein or in a Subsequent Agreement, Employee
         shall have no further obligations to Employer after the Retirement
         Date. Employer shall cause its personnel records to reflect that
         Employee retired from employment with Employer effective on the
         Retirement Date.

2.       PRIOR AGREEMENTS SUPERSEDED. Except as otherwise specifically provided
         herein, this Agreement supersedes and replaces all other prior
         agreements, written or oral, relating to Employee's employment with
         Employer and/or any of Employer's affiliated companies.
<PAGE>
3.       2001 SALARY AND BONUS. Employee will continue or continued to receive
         his current, regular salary through the Retirement Date, less
         applicable withholding taxes. In addition, prior to the Retirement
         Date, Employee received a bonus for the calendar year 2001 in the
         amount of One Hundred Thousand U.S. Dollars (U.S.$100,000), less
         applicable withholding taxes.

4.       MANAGEMENT INCENTIVE PLAN. Prior to the Retirement Date, Employee
         participated in the Willbros USA, Inc. Management Incentive Plan dated
         January 1, 1996 ("Incentive Plan"). Employee acknowledges that the
         Incentive Plan terminated December 31, 1998 and that Employee is not
         entitled to any further payments or benefits under the Incentive Plan.

5.       MEDICAL INSURANCE CONTINUATION. Employee acknowledges that Employer no
         longer provides benefits under the Retiree Medical Plan which it
         previously maintained and that neither Employee nor Employee's
         dependents are entitled to any benefits thereunder. If Employee is not
         entitled to Medicare benefits, Employee will be entitled to continue
         participation for a limited period of time in Employer's Group Medical
         Plan, Group Dental Plan and/or Executive Medical Plan under the
         Consolidated Omnibus Budget Reconciliation Act of 1985 ("COBRA").
         Detailed information concerning the costs and procedures applicable to
         such insurance coverage will be provided separately by Employer.

6.       LIFE INSURANCE CONVERSION. Employee has the right to convert Employee's
         life insurance coverage under Employer's Group Life Plan and dependent
         life insurance coverage obtained by the Employee under Employer's
         Dependent Life Plan to individual life insurance policies. Conversion
         forms and premium rates applicable to such conversion programs will be
         provided separately by the relevant insurer.

7.       PENSION PLAN. As a vested participant in the Willbros USA, Inc. Pension
         Plan ("Pension Plan") previously maintained by Employer for the benefit
         of eligible employees, Employee was entitled to certain retirement
         benefits in accordance with the Pension Plan termination procedure
         approved by the Internal Revenue Service (the "Pension Plan Termination
         Procedure"). Under the Pension Plan Termination Procedure, Employee
         elected to receive a lump sum distribution of benefits. Employee
         acknowledges that upon Employee's receipt of the lump sum distribution
         Employee elected to receive no further benefits will be payable to
         Employee under the Pension Plan or the Pension Plan Termination
         Procedure.

8.       EXECUTIVE BENEFIT RESTORATION PLAN. Prior to the Retirement Date,
         Employee also participated in the Willbros USA, Inc. Executive Benefit
         Restoration Plan ("Restoration Plan"). Effective January 22, 2001, the
         Restoration Plan was terminated and Employee received a distribution of
         all benefits to which Employee was entitled under the Restoration Plan.
         Employee releases the Employer, the

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         Restoration Plan Trust, the Restoration Plan Trustee, and the
         Restoration Plan administrators from any further claims for benefits
         under the Restoration Plan.

9.       INCENTIVE STOCK OPTIONS. Employee is vested in certain incentive stock
         options and certain non-qualified stock options provided by Employer's
         parent company, Willbros Group, Inc. ("WGI"), pursuant to the Willbros
         Group, Inc. 1996 Stock Plan ("Stock Plan"). All options granted to
         Employee under the Stock Plan prior to the Retirement Date have fully
         vested prior to the Retirement Date. Nothing in this Agreement shall
         affect any rights or obligations of Employee or WGI under the Incentive
         Stock Option Agreement or the Non-Qualified Stock Option Agreements
         entered into between Employee and WGI pursuant to the Stock Plan.
         Employee acknowledges that any of Employee's incentive stock options
         awarded under the Stock Plan which are exercised more than three (3)
         months after the Retirement Date will be treated as non-qualified stock
         options for U.S. federal income tax purposes.

10.      EMPLOYER INVESTMENT PLAN. Employee is fully vested in Employer's 401(k)
         Investment Plan ("Investment Plan"). Employee has the option of
         receiving a lump-sum distribution of Employee's total account balance
         in the Investment Plan, transferring such account balance to another
         tax-qualified plan or to an Individual Retirement Account or leaving
         such account balance in the Investment Plan. Election forms and
         detailed information concerning Employee's options with respect to
         Employee's account balance in the Investment Plan will be provided
         separately by Employer.

11.      DIRECTOR AND OFFICER MATTERS. Employee shall resign or has resigned
         from all employee, officer, director and committee member positions
         which Employee holds with Employer or any affiliate of Employer
         effective as of the Retirement Date. Nothing in this Agreement shall
         affect any of Employee's rights or obligations with respect to
         indemnification or director and officer liability insurance coverage to
         which Employee is entitled or subject in his capacity as a former
         director and officer of Employer, WGI and certain of their affiliates,
         whether under that certain Indemnification Agreement between WGI and
         Employee dated June 27, 1996, or otherwise.

12.      ACCRUED VACATION PAY. On the Retirement Date, Employee shall receive or
         received Thirty Eight Thousand Five Hundred U.S. Dollars (U.S.$38,500),
         less applicable payroll tax withholding, as compensation for all of
         Employee's accrued vacation time through the Retirement Date.

13.      OTHER BENEFITS. Except as specifically set forth herein, all employment
         benefits previously made available to Employee by Employer or any of
         its affiliates, including, without limitation, those made available
         under Employer's Executive Compensation Program, shall cease or ceased
         to be available to Employee as of

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         the Retirement Date. Employee acknowledges that he is not entitled to
         receive any compensation, severance payment or retirement enhancement
         payment under the Employer's 1999 or 2000 Reduction-In-Force Plans or
         WGI's Severance Protection Plan.

14.      LUMP SUM PAYMENT. On the Retirement Date or the Effective Date (as
         defined in Paragraph 20 below), whichever last occurs, Employer shall
         pay to Employee a lump sum amount of Five Hundred Thirty Thousand Five
         Hundred U.S. Dollars (U.S.$530,500), less applicable payroll tax
         withholding, in consideration of the release specified below and the
         acknowledgements, waivers, representations and undertakings specified
         herein.

15.      RELEASE.

         (a) Except for the obligations of Employer specifically set forth in
         this Agreement or referenced in this Agreement as continuing
         obligations, Employee fully and forever relieves, releases, and
         discharges Employer, WGI and all of their respective representatives,
         officers, directors, shareholders, predecessors, successors, parents,
         subsidiaries, operating units, affiliates, divisions, employees and
         attorneys from any and all claims, debts, liabilities, demands,
         obligations, promises, acts, agreements, costs, expenses, damages,
         actions, and causes of action, whether in law or in equity, whether
         known or unknown, suspected or unsuspected, arising from Employee's
         employment with and termination from Employer, including but not
         limited to any and all claims pursuant to Title VII of the Civil Rights
         Act of 1964, 42 U.S.C. Section 2000e, et seq., as amended by the Civil
         Rights Act of 1991, which prohibits discrimination in employment based
         on race, color, national origin, religion or sex; the Civil Rights Act
         of 1966, 42 U.S.C. Section 1981, 1983 and 1985, which prohibits
         violations of civil rights; the Age Discrimination in Employment Act of
         1967, as amended, and as further amended by the Older Workers Benefit
         Protection Act, 29 U.S.C. Section 621, et seq., which prohibits age
         discrimination in employment; the Employment Retirement Income Security
         Act of 1974, as amended, 29 U.S.C. Section 1001, et seq., which
         protects certain employee benefits; the Americans with Disabilities Act
         of 1990, as amended, 42 U.S.C. Section 12101, et seq., which prohibits
         discrimination against the disabled; the Family and Medical Leave Act
         of 1993, 29 U.S.C. Section 2601, et seq., which provides medical and
         family leave; the Fair Labor Standards Act, 42 U.S.C. Section 201, et
         seq., including the Wage and Hour Laws relating to payment of wages; 85
         O.S. 1991 Sections 5, 6 and 7, which prohibits discharge in retaliation
         for exercising rights under Oklahoma's Workers' Compensation Act; and
         all other federal, state or local laws or regulations prohibiting
         employment discrimination. This release also includes, but is not
         limited to, a release by Employee of any claims for breach of contract,
         mental pain, suffering and anguish, emotional upset, impairment of
         economic opportunities, unlawful interference with employment rights,
         defamation, intentional or negligent infliction of emotional distress,
         fraud, wrongful termination, wrongful discharge in violation of public
         policy,

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         breach of any express or implied covenant of good faith and fair
         dealing, that Employer has dealt with Employee unfairly or in bad
         faith, and all other common law contract and tort claims.

         (b) Except for the obligations of Employee specifically set forth in
         this Agreement or referenced in this Agreement as continuing
         obligations, Employer, on behalf of itself and its affiliates, fully
         and forever relieves, releases, and discharges Employee, from any and
         all claims, debts, liabilities, demands, obligations, promises, acts,
         agreements, costs, expenses, damages, actions, and causes of action,
         whether in law or in equity, whether known or unknown, suspected or
         unsuspected, arising from Employee's employment with and termination
         from Employer.

16.      CONFIDENTIALITY. For a period of two (2) years after the Retirement
         Date, Employee shall not, except as otherwise required by law, furnish,
         disclose or make accessible to any person, entity or government
         authority, any material knowledge, trade secrets, customer information,
         supplier information, plans, opportunities, procedures, data,
         techniques or other information directly relating to the businesses or
         finances of Employer or any of its affiliates or any confidential
         information obtained from other parties by Employee pursuant to the
         terms of a confidentiality agreement entered into by Employer or one of
         its affiliates. The prohibitions set forth in the preceding sentence
         shall not apply, however, to information in the public domain (but only
         if the same becomes part of the public domain through a means other
         than a disclosure prohibited hereunder). In addition, Employee shall
         continue to comply fully with the use and disclosure restrictions set
         forth in all third party confidentiality agreements entered into by the
         Employer or its affiliates on or prior to the Retirement Date to the
         extent such third party agreements are known to Employee.

17.      REMEDIES. The parties recognize that, because of the nature of the
         subject matter of Paragraph 16 above, it would be impracticable and
         extremely difficult to determine the actual damages suffered by
         Employer in the event of a material breach of Employee's obligations
         thereunder. Accordingly, if Employee does not cure a material violation
         of Paragraph 16 within ten (10) days after receiving written notice
         thereof from Employer, Employer or any of its successors or assigns
         shall have the following rights and remedies:

         (a)      to have the provisions of Paragraph 16 specifically enforced
                  by any court having equity jurisdiction, without the posting
                  of bond or other security, it being acknowledged and agreed by
                  Employee that any material breach of Paragraph 16 will cause
                  irreparable injury to Employer and that an injunction may be
                  issued against Employee to stop or prevent any such material
                  breach; and

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         (b)      to recover such actual damages as Employer or its affiliates
                  may incur as a result of such material breach.

         The curing of a material breach of Paragraph 16 shall not preclude
         Employer from seeking the recovery of its actual damages resulting from
         such breach.

18.      INDEPENDENT LEGAL ADVICE. Employee acknowledges that he has had the
         opportunity to be represented by independent legal counsel of his
         choice with respect to the advisability of signing this Agreement and
         providing the releases, waivers, acknowledgements, representations and
         undertakings specified herein, and with respect to his rights and
         obligations under the terms of this Agreement.

19.      KNOWLEDGE OF CONTENTS. Both parties acknowledge that they have
         carefully read this Agreement and that the contents hereof are known
         and understood by them. This Agreement is signed freely by each party
         hereto.

20.      REVIEW AND REVOCATION PERIOD. Employee acknowledges that he has been
         extended a period of forty five (45) days within which to consider this
         Agreement. For a period of seven (7) days following Employee's
         execution of the Agreement, Employee may revoke this Agreement by
         notifying Employer, in writing, of his desire to do so. From and after
         the date which is seven (7) days after Employee's execution of this
         Agreement (the "Effective Date"), this Agreement shall be binding and
         enforceable.

21.      OBLIGATION TO RETURN FUNDS. In the event Employee exercises his right
         to revocation set forth in Section 20 above, Employee shall immediately
         return to Employer all amounts, if any, paid to Employee as
         consideration under this Agreement. The duty to return funds under this
         Agreement shall survive the revocation of the Agreement and shall
         constitute a separately enforceable obligation between Employee and
         Employer.

22.      NO ADMISSION OF LIABILITY. This Agreement and compliance with this
         Agreement shall not be construed as an admission by Employer or
         Employee of any liability whatsoever, or as an admission by Employer of
         any violation of the rights of Employee or any other person, or any
         violation of any order, law, statute, duty or contract.

23.      SEVERABILITY. In the event that any provision of this Agreement should
         be held to be void, voidable, or unenforceable, the remaining portions
         hereof shall remain in full force and effect.

24.      GOVERNING LAW. This Agreement will be interpreted and enforced in
         accordance with the laws of the State of Texas.

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25.      ENTIRETY AND INTEGRATION. Upon the execution hereof by all of the
         parties hereto, this Agreement shall constitute a single, integrated
         contract expressing the entire agreement of the parties relative to the
         subject matter hereof and, except as other specifically noted herein,
         supersedes all prior negotiations, understandings and/or agreements, if
         any, of the parties. No covenants, agreements, representations, or
         warranties of any kind whatsoever have been made by any party hereto,
         except as specifically set forth in this Agreement.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first mentioned above.

EMPLOYEE                                 EMPLOYER

                                         Willbros USA, Inc.

      /s/  Melvin F. Spreitzer                  /s/ Larry J. Bump
                                         By:
--------------------------------            ------------------------------------
         Melvin F. Spreitzer                        Larry J. Bump
                                            Chairman and Chief Executive Officer

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