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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   ----------

                                    FORM 11-K

(Mark One)
( X )  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
       EXCHANGE ACT OF 1934

                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 2002

                                       OR

(  )   TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
       EXCHANGE ACT OF 1934

            FOR THE TRANSITION PERIOD FROM __________ TO ___________

                        COMMISSION FILE NUMBER 333-21399

A.   Full title of the plan and the address of the plan, if different from that
     of the issuer named below:

                   Willbros Employees' 401(k) Investment Plan
                        4400 Post Oak Parkway, Suite 1000
                              Houston, Texas 77027


B.   Name of issuer of the securities held pursuant to the plan and the address
     of its principal executive office:

                              Willbros Group, Inc.
                               Plaza 2000 Building
                             50th Street, 8th Floor
                                  Apartado 6307
                          Panama 5, Republic of Panama
                         Telephone No.: (50-7) 213-0947



================================================================================





                                    SIGNATURE


Pursuant to the requirements of the Securities Exchange Act of 1934, the
Willbros Employees' 401(k) Investment Plan has duly caused this annual report to
be signed on its behalf by the undersigned hereunto duly authorized.


                                       WILLBROS EMPLOYEES' 401(k)
                                             INVESTMENT PLAN



Date:   June 30, 2003                  By: /s/ Warren L. Williams
                                           --------------------------------
                                           Warren L. Williams
                                           Willbros Employee Benefits Committee




                                      -2-







                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN


                                    INDEX TO
                                    --------

                FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULES
                -----------------------------------------------


                                                                            Page
                                                                            ----
                                                                         
Independent Auditors' Report                                                   4

Financial Statements:

        Statements of Net Assets Available for Plan Benefits                   5

        Statements of Changes in Net Assets Available for Plan Benefits        6

        Notes to Financial Statements                                          7-12

        Schedule 1 -- Schedule G, part III -- Schedule of nonexempt
           transactions                                                        13

        Schedule 2 -- Schedule H, Line 4i - Schedule of Assets
           (Held at End of Year)                                               14



All other schedules required by the Department of Labor's Rules and Regulations
for Reporting and Disclosure under the Employee Retirement Income Security Act
of 1974 are omitted, as they are inapplicable or not required.



                                      -3-










                          INDEPENDENT AUDITORS' REPORT



Willbros Employees' Benefits Committee
Willbros USA, Inc.:


We have audited the accompanying statements of net assets available for plan
benefits of Willbros Employees' 401(k) Investment Plan as of December 31, 2002
and 2001, and the related statements of changes in net assets available for plan
benefits for the years then ended. These financial statements are the
responsibility of the Plan's management. Our responsibility is to express an
opinion on these financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States of America. Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the net assets available for plan benefits of Willbros
Employees' 401(k) Investment Plan as of December 31, 2002 and 2001, and the
changes in net assets available for plan benefits for the years then ended in
conformity with accounting principles generally accepted in the United States of
America.

Our audits were performed for the purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental schedule G, part III --
schedule of nonexempt transactions for the year ended December 31, 2002 and
schedule H, line 4i - schedule of assets (held at end of year) as of December
31, 2002, are presented for purposes of additional analysis and are not a
required part of the basic financial statements but are supplementary
information required by the Department of Labor's Rules and Regulations for
Reporting and Disclosure under the Employee Retirement Income Security Act of
1974. The supplemental schedules are the responsibility of the Plan's
management. The supplemental schedules have been subjected to the auditing
procedures applied in the audits of the basic financial statements and, in our
opinion, are fairly stated, in all material respects, in relation to the basic
financial statements taken as a whole.





Houston, Texas
June 27, 2003



                                      -4-








                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

              Statements of Net Assets Available for Plan Benefits

                           December 31, 2002 and 2001




                                                                  2002               2001
                                                              ------------       ------------
                                                                           
Investments, at fair value                                    $ 17,297,502         23,585,782
Accrued investment income                                            3,625              4,840
Due from broker                                                    227,169                 --
Contributions receivable:
    Employer - cash                                                 42,543             42,483
    Employer - stock                                                10,923                 --
    Participants                                                   121,499             62,407
Due to broker                                                     (234,097)           (38,518)
                                                              ------------       ------------
              Net assets available for plan benefits          $ 17,469,164         23,656,994
                                                              ============       ============




See accompanying notes to financial statements.



                                      -5-







                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

         Statements of Changes in Net Assets Available for Plan Benefits

                     Years ended December 31, 2002 and 2001



                                                                              2002               2001
                                                                          ------------       ------------
                                                                                       
Investment income:
    Net (depreciation) appreciation in fair value of investments          $ (2,926,002)         1,999,422
    Dividends                                                                   49,611             53,581
    Interest                                                                    36,210             20,671
                                                                          ------------       ------------
                                                                            (2,840,181)         2,073,674
                                                                          ------------       ------------
Contributions:
    Employer - cash, net of forfeitures                                        619,900            542,433
    Employer - stock                                                           453,813            418,169
    Participants                                                             2,132,536          1,874,746
    Rollovers                                                                  161,220          1,919,931
    Other                                                                           --              1,702
                                                                          ------------       ------------
                                                                             3,367,469          4,756,981
                                                                          ------------       ------------
Benefits paid to participants                                               (6,619,390)        (2,506,163)
Trustee and other fees                                                         (95,728)           (99,892)
                                                                          ------------       ------------
              Net (decrease) increase                                       (6,187,830)         4,224,600
Net assets available for plan benefits:
    Beginning of year                                                       23,656,994         19,432,394
                                                                          ------------       ------------
    End of year                                                           $ 17,469,164         23,656,994
                                                                          ============       ============




See accompanying notes to financial statements.





                                      -6-




                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001





(1)  DESCRIPTION OF PLAN

     The following description of the Willbros Employees' 401(k) Investment Plan
     (the Plan) provides only general information. Participants should refer to
     the Plan document for a more complete description of the Plan's provisions.

     (a)  GENERAL

          The Plan is a defined contribution plan covering eligible employees of
          Willbros USA, Inc., Willbros Engineers, Inc., Willbros RPI, Inc.,
          Willbros Operating Services, Inc., and all salaried employees of
          Willbros Energy Services Company (collectively, the Company). It is
          subject to the provisions of the Employee Retirement Income Security
          Act of 1974, as amended (ERISA).

     (b)  ELIGIBILITY

          Eligible employees begin participation in the Plan after completing
          three months of service, as defined in the Plan document. Prior to
          April 1, 2001 the eligibility period was one year of service.

     (c)  CONTRIBUTIONS

          Participants may contribute, by payroll deductions, from 1% to 20% of
          their compensation to the Plan and allocate these amounts as deferred
          or taxable contributions. Effective as of June 1, 2002, participants
          may contribute from 1% to 50% of their compensation. Effective June 1,
          2002, participants who are age 50 or older at any time during the plan
          year may elect to make an additional catch-up contribution of up to
          $1,000 in 2002. The catch-up contribution is not eligible for Company
          matching. The Company matches employee contributions, up to a maximum
          of 4% of salary as follows: 100% in the form of cash or 125% in the
          form of Willbros Group, Inc. common stock, as elected by the employee.
          Matching contributions elected in the form of Willbros Group Inc.
          Common Stock are not subject to the participants investment direction
          for a two year period and are not available for loans or withdrawals
          during such two year period.

          Participants may also elect to rollover distributions from a former
          employer's qualified retirement plan.

     (d)  PARTICIPANT ACCOUNTS

          Each participant's account is credited with the participant's
          contributions and the Company contributions. At each valuation date,
          participants' accounts for each investment option are credited with
          their share of the net income and gains and charged with losses and
          administrative expenses. The benefit to which a participant is
          entitled is the benefit that can be provided from the participant's
          vested account.




                                      -7-                            (Continued)





                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001


     (e)  VESTING

          Participants are immediately vested in their voluntary contribution
          account and their salary reduction account plus actual earnings
          thereon. Effective April 1, 2001, vesting in the Company contribution
          account is based on years of service earned as follows: one to two
          years - 25%; two to three years - 50%; three to four years - 75%; and
          over four years - 100%. Prior to April 1, 2001, vesting in the Company
          contribution account was based on years of service earned as follows:
          three to four years - 50%; four to five years - 75%; five or more
          years - 100%.

     (f)  FORFEITURES

          The portion of a participant's Company contribution account that is
          forfeited because of termination of employment before full vesting is
          used to reduce the Company's future contributions.

     (g)  PAYMENT OF PLAN BENEFITS

          Upon termination of service, participants may elect to receive a
          lump-sum amount equal to the vested value of their accounts, or, if
          vested plan benefits exceed $5,000, defer distribution until age 65 is
          reached or death occurs.

          Participants may make a withdrawal of their after-tax contribution
          account, the vested percentage of their Company contribution account
          and, if over age 59-1/2, their pre-tax contribution accounts provided
          that amounts withdrawn from any account have been in that account for
          more than two years. Only one withdrawal is permitted within any
          twelve-month period. If a participant makes a withdrawal the
          participant is suspended from Company matching contributions for a
          six-month period.

          Hardship withdrawals from salary reduction accounts before age 59-1/2
          are also permitted under certain circumstances.

     (h)  PARTICIPANT LOANS

          Participants may borrow from the Plan pursuant to Section 408(b)(1) of
          ERISA. Loans to a participant may not exceed the lesser of 50% of the
          vested portion of his or her account, or $50,000 less the
          participant's highest outstanding loan balance during the preceding 12
          months. The minimum loan is $1,000.

          Loans are stated at cost, which approximates fair value.

     (i)  INVESTMENT OPTIONS

          Participants may direct the investment of their account as follows:

          SPECIFICALLY DIRECTED INVESTMENTS

          Participants who were employed by Willbros USA, Inc. or Willbros
          Energy Services Company on December 31, 1996 may direct the investment
          of their accounts into savings accounts, certificates of deposits,
          obligations of the United States, common and preferred stocks, call
          and put options, bonds, debentures and other debt instruments and
          stock, debt or securities issued by private placement.



                                      -8-                            (Continued)



                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001


          CORE INVESTMENT OPTIONS

          Participants may direct the investment of their accounts into the
          following core investments:

                        The Frank Russell Investment Contract Fund
                        The Frank Russell Fixed Income I Fund
                        The Frank Russell Balanced Income Fund
                        The Frank Russell Domestic Conservative Balanced Fund
                        The Frank Russell Global Balanced Fund
                        The Frank Russell Aggressive Balanced Fund
                        The Frank Russell Global Equity Fund
                        The Frank Russell Equity I Fund
                        The Frank Russell All International Markets Fund
                        The Frank Russell Small Capitalization Fund
                        Willbros Group, Inc. Common Stock

          FLEXIBLE CHOICE OPTIONS

          Participants who are currently employed may direct the investment of
          existing account balances, but not current contributions, in one
          percent increments into approximately 400 mutual funds.

          The Plan holds units of the Frank Russell Trust Company Investment
          Contract Fund (Investment Contract Fund). The Investment Contract Fund
          invests primarily in group annuity contracts and synthetic investment
          contracts and is fully benefit-responsive. The Investment Contract
          Fund is recorded at contract value which approximates fair value. The
          average yield of the Investment Contract Fund was 5.46% and 6.37% for
          the years ended December 31, 2002 and 2001, respectively.

     (j)  ADMINISTRATIVE EXPENSES

          Administrative expenses of the Plan (except transaction fees for
          participants' specifically directed investments and trustee fees) are
          paid by the Company.

(2)  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     (a)  BASIS OF PRESENTATION

          The accompanying financial statements of the Plan have been prepared
          on an accrual basis. The preparation of financial statements in
          conformity with accounting principles generally accepted in the United
          States of America requires management to make estimates and
          assumptions that affect the reported amounts of net assets available
          for plan benefits and changes in net assets available for plan
          benefits during the reporting period. Actual results could differ from
          those estimates.


                                      -9-                            (Continued)







                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001



     (b)  NET ASSETS AVAILABLE FOR PLAN BENEFITS

          Net assets available for plan benefits include benefits payable to
          current participants and those who have withdrawn from the Plan. The
          annual information return filed with the Internal Revenue Service
          (Form 5500) requires amounts due to participants who have withdrawn
          from the Plan to be stated as a liability and a distribution. There
          were no such benefits payable at December 31, 2002 and 2001.

     (c)  INVESTMENTS

          Investments in equity securities and mutual funds are recorded at fair
          value based upon quoted market prices. Investments in common
          collective trust funds are recorded at the Plan's proportionate share
          of the fair value of the holdings of the common collective trust
          funds. Participant loans are valued at cost, which approximates fair
          value. Realized gains (losses) on the sale of investments and
          unrealized appreciation (depreciation) in the fair value of
          investments are shown as net appreciation (depreciation) in fair value
          of investments in the statement of changes in net assets available for
          plan benefits.

          Purchase and sales of securities are recorded on a trade-date basis.
          Interest is recorded as earned. Dividends are recorded on the
          ex-dividend date.

(3)  RISKS AND UNCERTAINTIES

     The Plan provides for investments in equity securities, mutual funds
     common/collective trust funds and Willbros Group, Inc. common stock.
     Investment securities, in general, are exposed to various risks, such as
     interest rate, credit, and overall market volatility risks. Due to the
     level of risk associated with certain investment securities, it is
     reasonably possible that changes in the value of investment securities will
     occur in the near term.

(4)  PLAN TERMINATION

     Although it has not expressed any intent to do so, the Company has the
     right under the Plan to discontinue its contributions at any time and to
     terminate the Plan subject to the provisions of ERISA. In the event of plan
     termination, participants will become 100% vested in their accounts.

(5)  TAX STATUS

     The Plan was established January 1, 1976 under the provisions of ERISA. The
     Internal Revenue Service (IRS) has determined that the Plan is qualified
     under Section 401(a) and 401(k) of the Internal Revenue Code (IRC) and that
     the Plan is exempt from Federal income taxes under Section 501(a) which
     provides that earned income is taxable only upon distribution thereof. A
     favorable determination letter was received from the IRS on August 1, 2002.
     The Plan has been amended since receiving the determination letter.
     However, management believes that the Plan is designed and is currently
     operated within the applicable requirements of the IRC.


                                      -10-                           (Continued)






                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001



(6)   ADMINISTRATION

      The Plan's investments and cash are held by Bank of Oklahoma, N.A. and
      administered under a trust agreement with the Company. The Plan's
      investment options are managed by Frank Russell Trust Company (FRTC),
      which has full discretionary authority for purchase and sale of
      investments not specifically directed by participants within the approved
      Plan options; however, the Willbros Employees' Benefits Committee retains
      the right to change the options available to participants.

      The following table presents the fair values of individual investments
      that represent 5% or more of the Plan's net assets at December 31, 2002
      and 2001.



                                                       2002             2001
                                                    ----------       ---------
                                                               
The Frank Russell Investment Contract Fund          $2,972,812       2,290,682
The Frank Russell Fixed Income I Fund                2,382,642       1,632,329
The Frank Russell Global Balanced Fund               1,880,900       2,751,195
The Frank Russell Equity I Fund                      2,353,844       2,729,545
The Frank Russell Small Capitalization Fund          1,358,998       1,653,133
Willbros Group, Inc. common stock                    1,520,453       2,658,976




     During 2002 and 2001, the Plan's investments (including gains and losses on
     investments bought and sold, as well as held during the year) (depreciated)
     appreciated in value by $(2,926,002) and $1,999,422, respectively as
     follows:



                              2002              2001
                          -----------       -----------
                                      
Mutual Funds              $(1,373,960)        1,359,607
Common stock               (1,552,042)          519,850
Government bonds                   --           119,965
                          -----------       -----------
                          $(2,926,002)        1,999,422
                          ===========       ===========



(7)  RECLASSIFICATIONS

     Certain reclassifications have been made to the prior year amounts to
     conform to the current year presentation.

(8)  WILLBROS GROUP, INC. COMMON STOCK

     Each participant is entitled to exercise voting rights attributable to the
     shares of Willbros Group, Inc. common stock allocated to his or her account
     and is notified by the trustee prior to the time that such rights are to be
     exercised. If instructions have not been given by the participant, the
     trustee will vote the Willbros Group, Inc. common stock credited to the
     participant's account in the same proportion as it votes those shares
     allocated to participants' accounts for which it receives voting
     instructions.




                                      -11-                           (Continued)






                   WILLBROS EMPLOYEES' 401(K) INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001



(9)  SUBSEQUENT EVENT

     Effective January 1, 2003, the Plan reduced the rate of matching Company
     stock contributions from $1.25 per dollar of participant contributions to
     $1.00 per dollar of participant contributions.

     In addition, Company matching contributions elected in Willbros Group, Inc.
     common stock will be immediately subject to investment direction by the
     participant.

(10) NONEXEMPT TRANSACTIONS

     As reported on Schedule 1, a participant's contribution was not remitted to
     the trust within the time frame specified by the Department of Labor's
     Regulation 29 CFR 2510.3-102, thus constituting nonexempt transactions
     between the Plan and the Company for the year ended December 31, 2002.


                                      -12-




                                                                      SCHEDULE 1


                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

           SCHEDULE G, PART III - SCHEDULE OF NONEXEMPT TRANSACTIONS

                          YEAR ENDED DECEMBER 31, 2002




                                   RELATIONSHIP TO                                                           LOANED
IDENTITY OF PARTY INVOLVED              PLAN                      DESCRIPTION OF TRANSACTION                 AMOUNT
-----------------------------      ---------------      ------------------------------------------------     -------
                                                                                                    
                                                        Lending of monies from the Plan to the employer
                                                        (participant contribution not timely remitted to
Willbros Group, Inc.               Employer             the Plan) as follows:


                                                        Deemed loan dated February 22, 2002, maturity
                                                        June 21, 2002                                        $10,500


See accompanying independent auditors' report.


                                      -13-

                                                                      SCHEDULE 2

                   WILLBROS EMPLOYEES' 401(k) INVESTMENT PLAN

         Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

                               December 31, 2002





                                                       DESCRIPTION OF INVESTMENT
   IDENTITY OF ISSUE, BORROWER,                      INCLUDING MATURITY DATE, RATE
     LESSOR, OR SIMILAR PARTY                      OF INTEREST, PAR, OR MATURITY VALUE                  SHARES       CURRENT VALUE
---------------------------------         --------------------------------------------------------   -------------   ---------------
                                                                                                            
AP Cash Management                        Cash                                                             160,747      $   160,746
Cash                                      Cash                                                               5,707            5,707
Flexible Choice Options                   Various investments                                                   --          754,100
Frank Russell Investment Company          Frank Russell Trust Equity I Fund                                 90,255        2,353,844
Frank Russell Investment Company          Frank Russell Trust Fixed Income I Fund                          107,423        2,382,642
Frank Russell Investment Company          Frank Russell Trust Small Capitalization Fund                     84,357        1,358,998
Frank Russell Investment Company          Frank Russell Trust Investment Contract Fund                     112,097        2,972,812
Frank Russell Investment Company          Frank Russell Trust Balanced Income Fund                          28,257          419,336
Frank Russell Investment Company          Frank Russell Trust Domestic Conservative Balanced Fund            8,247          168,643
Frank Russell Investment Company          Frank Russell Trust Global Balanced Fund                          74,373        1,880,900
Frank Russell Investment Company          Frank Russell Trust Aggressive Balance Fund                       44,643          613,840
Frank Russell Investment Company          Frank Russell Trust Global Equity Fund                            11,338          270,627
Frank Russell Investment Company          Frank Russell Trust All International Markets Fund                32,758          543,125
*Participant Loans                        Interest rates ranging from 5.25% to 10.5%                       598,141          598,141
Specifically Directed Investments         Various investments                                                   --        1,293,588
*Willbros Group, Inc.                     Common Stock                                                     184,970        1,520,453
                                                                                                                        -----------
        Total assets (held at end of year)                                                                              $17,297,502
                                                                                                                        ===========
* Indicates a party in interest.


See accompanying independent auditors' report.

                                      -14-





                                  EXHIBIT INDEX




EXHIBIT
NUMBER                          EXHIBIT
-------   ---------------------------------------------------------
       
     23   Independent Auditors' Consent

     99   Certification pursuant to 18 U.S.C. Section 1350, as adopted
          pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.