EXHIBIT 1

                                                                January 1, 2003

COGNICASE INC.
The Cite Multimedia
111 Duke Street
9th Floor
Montreal, Quebec
H3C 2M1

ATTENTION:     THE BOARD OF DIRECTORS

Dear Sir:

Re:  Revised Offer to acquire all of the outstanding Common Shares of
     Cognicase Inc.
- -----------------------------------------------------------------------

The purpose of this Agreement is to set forth the terms and conditions upon
which CGI Group Inc. (the "Offeror") agrees to make a revised offer to purchase
all of the outstanding Common Shares (including any Common Shares which may
become outstanding pursuant to the exercise of outstanding options and other
securities, instruments and rights convertible or exchangeable into Common
Shares or entitling the holder thereof to acquire Common Shares) (collectively,
the "Shares") in the share capital of Cognicase Inc. (the "Corporation") on the
basis described in Schedule A (the "Revised Offer"). All terms not otherwise
defined herein shall have the meaning ascribed thereto in Schedule B.

1.   THE REVISED OFFER

1.1  AGREEMENT AND TIMING

     (a)  The Offeror and the Corporation shall contemporaneously,
          promptly after the execution hereof, publicly announce the
          Revised Offer.

     (b)  The Offeror shall modify the Initial Offer pursuant to a notice of
          variation (the "Notice of Variation") describing the terms of the
          Revised Offer in both English and French in compliance with the
          Securities Laws. The Corporation and its counsel will be given a
          reasonable opportunity to review the Notice of Variation which shall
          be delivered in accordance with the notice provisions of Section 6.5
          hereof, and comment thereon, prior to it being mailed to holders of
          record of Common Shares (the "Shareholders") and filed with applicable
          securities regulatory authorities (the "Securities Authorities"). The
          Notice of Variation, when filed with the Securities Authorities and
          mailed to the Shareholders, shall



                                      -2-

          contain all information which is required to be included therein in
          accordance with the Securities Laws, and shall in all material
          respects comply with requirements of the Securities Laws. The terms of
          the Revised Offer shall comply with the terms of this Agreement. The
          Offeror agrees that the Notice of Variation shall be mailed as soon as
          practicable after the public announcement of the Revised Offer and, in
          any event, not later than January 3, 2003 (the date of such mailing
          being referred to herein as the "Notice of Variation Mailing Date").

     (c)  The Corporation shall prepare, for mailing to the Shareholders and
          filing with the Securities Authorities, a notice of change to the
          Directors' Circular (together with all amendments, supplements and
          exhibits thereto) (the "New Directors' Circular") in English and in
          French which shall contain the recommendation of the Corporation's
          Board of Directors to accept the Revised Offer, together with the
          fairness opinion contemplated pursuant to Subsection 2.3(p) hereof.
          The Corporation shall comply with all Securities Laws in respect of
          the Revised Offer. The Offeror and its counsel will be given a
          reasonable opportunity to review the New Directors' Circular, which
          shall be delivered in accordance with the notice provisions of Section
          6.5 hereof, and comment thereon, prior to it being mailed to
          Shareholders and filed with the Securities Authorities. The
          Corporation agrees that the New Directors' Circular shall be mailed as
          soon as practicable after the public announcement of the Revised Offer
          and, in any event, not later than January 6, 2003 (the date of such
          mailing being referred to herein as the "Directors' Circular Mailing
          Date").

     (d)  It is understood and agreed that, while the Revised Offer shall be
          subject to the conditions set forth in the Initial Offer, as varied as
          set forth in Schedule A, and identified as being for the benefit of
          the Offeror, the Offeror may, in its sole discretion, waive any of the
          conditions of the Revised Offer.

1.2  CONDITIONS PRECEDENT TO MAKING THE REVISED OFFER

     The obligation of the Offeror to proceed with the Revised Offer shall be
     conditional upon the following:

     (a)  the written favourable fairness opinion of BMO Nesbitt Burns Inc.
          (the "Financial Advisor"), financial advisor to the special committee
          (the "Special Committee") of the Corporation's Board of Directors,
          dated the date hereof, in respect of the Revised Offer shall not have
          been modified or withdrawn;

     (b)  the Board of Directors of the Corporation shall not have modified
          or withdrawn its decision to recommend that the holders of Shares
          accept the Revised Offer;



                                      -3-

     (c)  no circumstances shall exist and no event shall have occurred that
          render it impracticable for the conditions of the Revised Offer set
          forth in Schedule A to be satisfied;

     (d)  all of the representations and warranties of the Corporation set
          out in this Agreement shall be true and correct in all material
          respects at the Directors' Circular Mailing Date as if made on that
          date and all of the covenants and obligations of the Corporation set
          out in this Agreement shall have been complied with at the Directors'
          Circular Mailing Date and this Agreement shall not have been
          terminated in accordance with the terms hereof; and

     (e)  no Superior Proposal shall have been announced.

     The foregoing conditions precedent to making the Revised Offer are for
     the exclusive benefit of the Offeror and may be waived by the Offeror
     at any time and from time to time in whole or in part, without
     prejudice to any other rights which the Offeror may have.

1.3  CONDITIONS PRECEDENT TO PERFORMANCE OF CORPORATION'S OBLIGATIONS

     The performance by the Corporation of its obligations under
     Subsection 1.1(c) is conditional upon the following:

     (a)  all of the representations and warranties of the Offeror set out
          in this Agreement shall be true and correct in all material respects
          at the Notice of Variation Mailing Date as if made on that date and
          all of the covenants and obligations of the Offeror set out in this
          Agreement shall have been complied with at the Notice of Variation
          Mailing Date and this Agreement shall not have been terminated in
          accordance with the terms hereof;

     (b)  the written favourable fairness opinion of the Financial Advisor,
          dated the date hereof, in respect of the Revised Offer shall not have
          been modified or withdrawn;

     (c)  no Superior Proposal shall have been announced; and

     (d)  the Revised Offer has not been made in accordance with the terms
          of this Agreement.

     The foregoing conditions precedent are for the exclusive benefit of
     the Corporation and may be waived by the Corporation at any time and
     from time to time in whole or in part, without prejudice to any other
     rights which the Corporation may have.



                                      -4-

2.   ACKNOWLEDGMENTS, REPRESENTATIONS AND WARRANTIES

2.1  The Offeror  represents and warrants to the Corporation as follows (and
     acknowledges that the Corporation is relying upon these representations
     and warranties in entering into this Agreement):

     (a)  The authorized share capital of the Offeror is comprised of an
          unlimited number of First Preferred Shares, issuable in series, Second
          Preferred Shares, issuable in series, Class A Subordinate Shares and
          Class B Shares (multiple voting) of which, as at September 30, 2002,
          339,900,257 Class A Subordinate Shares and 40,799,774 Class B Shares
          were validly issued and outstanding as fully paid and non-assessable.
          The Class A Subordinate Shares of the Offeror are listed and posted
          for trading on the Toronto Stock Exchange and New York Stock Exchange;

     (b)  The Offeror is duly incorporated and organized and is validly
          existing under the laws of the Province of Quebec;

     (c)  The Offeror has the corporate power and capacity to enter into,
          and to perform its obligations under, this Agreement. The execution
          and delivery of this Agreement by the Offeror and the performance of
          its obligations hereunder have been duly authorized by all necessary
          corporate action on the part of the Offeror and this Agreement
          constitutes a valid and binding obligation of the Offeror enforceable
          against the Offeror in accordance with its terms, subject to the usual
          exceptions as to bankruptcy, insolvency and similar laws of general
          application and the availability of equitable remedies;

     (d)  None of (A) the execution and delivery by the Offeror of this
          Agreement, (B) the performance by the Offeror of its obligations
          hereunder or (C) the completion of the transactions contemplated
          herein will result in the imposition of any encumbrance, charge or
          lien upon any of the assets of the Offeror or give rise to any right
          of termination or acceleration of indebtedness, or cause any
          indebtedness to come due before its stated maturity, under any
          material agreement, contract, indenture, deed of trust, mortgage,
          bond, instrument, license, franchise or permit to which the Offeror is
          a party or by which it is bound or permit or result in any loss of any
          material rights or assets or any interest therein held by the Offeror;

     (e)  Other than in connection with or in compliance with the provisions
          of applicable Securities Laws, the Competition Act (Canada) and the
          Hart Scott Rodino Antitrust Improvements Act of 1976 (United States),
          no authorization, consent or approval of, or filing with, any public
          body, court or authority, and no authorization, consent or approval of
          any other party, is necessary for the



                                      -5-

          consummation by the Offeror of its obligations under this Agreement or
          for the consummation by the Offeror of the Revised Offer;

     (f)  The Offeror is not a party to, bound or affected by or subject to
          any charter or by-law provision, statute, regulation, judgement,
          order, decree or law which would be violated, contravened, breached by
          or under which default would occur as a result of the execution and
          delivery or performance of this Agreement or the Revised Offer and
          which violation, contravention, breach or default would be reasonably
          expected to result in a Material Adverse Change with respect to the
          Offeror;

     (g)  There is no material default by the Offeror in its filings
          required to be made pursuant to applicable Securities Laws;

     (h)  The Offeror has filed with Canadian securities regulators true and
          complete copies of all forms, reports, schedules, statements and other
          documents required to be filed by it since January 1, 2002, which
          documents, at the time filed, (i) complied in all material respects
          with the requirements of applicable Securities Laws and (ii) did not
          contain any material misrepresentation or any untrue statement of a
          material fact or omit to state a material fact required to be stated
          therein or necessary in order to make the statements made therein (in
          light of the circumstances under which they were made) not misleading,
          and the Offeror has not filed any such documents on a confidential
          basis with any Canadian securities regulatory authority since January
          1, 2002;

     (i)  The Class A Subordinate Shares to be issued pursuant to the
          Revised Offer will be (A) duly authorized, (B) validly issued as fully
          paid and non-assessable, (C) listed and posted for trading on the
          Toronto and New York stock exchanges and (D) freely tradeable by the
          holder without restrictions if, as and when the Shares are taken up
          and paid for by the Offeror under the Revised Offer, and the Offeror
          will keep reserved, from its authorized but unissued shares, a
          sufficient number of Class A Subordinate Shares to issue in exchange
          for all of the Shares tendered to the Revised Offer;

     (j)  Except as publicly disclosed, no Material Adverse Change has
          occurred since the date of the latest published audited consolidated
          annual financial statements of the Offeror;

     (k)  Except as disclosed in its filings made pursuant to applicable
          Securities Laws, no claim, litigation, action, suit or other
          proceeding by or before any domestic or foreign arbitrator, court or
          tribunal or governmental agency or other regulatory authority or
          administrative agency or commission is pending or, to the knowledge



                                      -6-

          of the Offeror, threatened against the Offeror or any of its
          Subsidiaries that would be reasonably likely to cause a Material
          Adverse Change with respect to the Offeror; and

     (l)  There is no event of default under any instrument or agreement to
          which the Offeror or any of its Subsidiaries is a party or by which it
          is bound which would be reasonably expected to result in a Material
          Adverse Change with respect to the Offeror.

2.2  The Offeror acknowledges that some of the entitlements mentioned under
     the heading "Other Information Other Rights" in the Directors' Circular
     cannot be accelerated or prepaid at the option of the Corporation.

2.3  The Corporation hereby represents and warrants to the Offeror as
     follows (and acknowledges that the Offeror is relying upon these
     representations and warranties in entering into this Agreement and
     conducting the Revised Offer) and acknowledges that it is a condition
     to the Offeror making the Revised Offer and taking-up the Shares under
     the Revised Offer, that all of the representations and warranties set
     forth herein shall be true and correct in all material respect on the
     Directors' Circular Mailing Date as if made on that date and true and
     correct in all material respect on the Effective Date:

     (a)  The authorized share capital of the Corporation is comprised of an
          unlimited number of Common Shares and an unlimited number of Preferred
          Shares, issuable in series;

     (b)  The Directors' Circular sets out, as of the date thereof, the
          issued share capital of the Corporation as well as all outstanding
          options to acquire Common Shares and other securities, instruments and
          rights convertible or exchangeable into Common Shares or entitling the
          holder thereof to acquire Common Shares;

     (c)  The Corporation is duly incorporated and organized and is validly
          existing under the CBCA;

     (d)  The Corporation has the corporate power and capacity to enter
          into, and to perform its obligations under, this Agreement. The
          execution and delivery of this Agreement by the Corporation have been
          authorized by all necessary corporate action on the part of the
          Corporation and constitutes a valid and binding obligation of the
          Corporation enforceable against the Corporation in accordance with its
          terms, subject to usual exceptions as to bankruptcy, insolvency, and
          similar laws of general application and the availability of equitable
          remedies;



                                      -7-

     (e)  Except as set forth in the Directors' Circular, neither the
          execution and delivery by the Corporation of this Agreement or the
          performance by it of its obligations hereunder or the completion of
          the transaction contemplated herein will result in the imposition of
          any encumbrance, charge or lien upon any of the assets of the
          Corporation or any of its Subsidiaries or give rise to any right of
          termination or acceleration of indebtedness, or cause any indebtedness
          to come due before its stated maturity, under any material agreement,
          contract, indenture, deed of trust, mortgage, bond, instrument,
          license, franchise or permit to which the Corporation and its
          Subsidiaries taken as a whole is a party or by which it is bound, give
          rise to any rights of first refusal (except for such rights which
          would not result in a Material Adverse Change) or trigger any change
          in control or influence provisions or any restriction or limitation
          under any such agreement, contract, indenture, deed of trust,
          mortgage, bond, instrument, license, franchise or permit or result in
          any loss of any material rights or assets or any interest therein held
          by the Corporation and its Subsidiaries taken as a whole;

     (f)  Other than in connection with or in compliance with the provisions
          of applicable Securities Laws, the Competition Act (Canada) and the
          Hart Scott Rodino Antitrust Improvements Act of 1976 (United States),
          no authorization, consent or approval of, or filing with, any public
          body, court or authority, and no authorization, consent or approval of
          any other party, is necessary for the consummation by the Corporation
          of its obligations under this Agreement or for the consummation by the
          Offeror of the Revised Offer;

     (g)  The Corporation has filed with Canadian securities regulators true
          and complete copies of all forms, reports, schedules, statements and
          other documents required to be filed by it since January 1, 2002,
          which documents, at the time filed, (i) complied in all material
          respects with the requirements of applicable Securities Laws and (ii)
          did not contain any material misrepresentation or any untrue statement
          of a material fact or omit to state a material fact required to be
          stated therein or necessary in order to make the statements made
          therein (in light of the circumstances under which they were made) not
          misleading, and the Corporation has not filed any such documents on a
          confidential basis with any Canadian securities regulatory authority
          since January 1, 2002;

     (h)  Except as publicly disclosed, no Material Adverse Change has
          occurred since the date of the latest published audited consolidated
          annual financial statements of the Corporation;

     (i)  There is no material default by the Corporation in its filings
          required to be made pursuant to applicable Securities Laws;



                                      -8-

     (j)  Except as disclosed in the Directors' Circular, there is no
          agreement, understanding or commitment between the Corporation or any
          of its Subsidiaries, on the one hand, and one or more executives of
          the Corporation or any of its Subsidiaries, on the other hand, which
          may be affected by a change of control of the Corporation or any of
          its Subsidiaries, except for options to purchase Common Shares which
          may have accelerated vesting or exercise provisions;

     (k)  Except as disclosed in its filings made pursuant to applicable
          Securities Laws, no claim, litigation, action, suit or other
          proceeding by or before any domestic or foreign arbitrator, court or
          tribunal or governmental agency or other regulatory authority or
          administrative agency or commission is pending or, to the knowledge of
          the Corporation, threatened against the Corporation or any of its
          Subsidiaries that would be reasonably likely to cause a Material
          Adverse Change with respect to the Corporation;

     (l)  There is no covenant, term or condition, other than customary
          termination provisions in customers/services agreements, of any
          instrument or agreement of the Corporation or its Subsidiaries that,
          upon the purchase by the Offeror of the Shares, would result in a
          Material Adverse Change;

     (m)  Except as disclosed in the Directors' Circular, there is no event
          of default under any instrument or agreement to which the Corporation
          or any of its Subsidiaries is a party or by which it is bound which
          would be reasonably expected to result in a Material Adverse Change
          with respect to the Corporation;

     (n)  Except as disclosed in the Directors' Circular, neither the
          Corporation nor any of its Subsidiaries is a party to, bound or
          affected by or subject to any charter or by-law provision, statute,
          regulation, judgement, order, decree or law which would be violated,
          contravened, breached by or under which default would occur as a
          result of the execution and delivery or performance of this Agreement
          or the Revised Offer and which violation, contravention, breach or
          default would be reasonably expected to result in a Material Adverse
          Change with respect to the Corporation;

     (o)  Except for the purpose of the services rendered by the Financial
          Advisor in accordance with the terms of the engagement letter dated
          December 7, 2002, including the fairness opinion, no agent, broker,
          investment banker or other firm or person is or will be entitled to
          any broker's or finder's fee or other commission or similar fee
          incurred by the Corporation or any of its Subsidiaries in connection
          with the consummation of the transactions contemplated hereby or by
          the Revised Offer;



                                      -9-

     (p)  The Financial Advisor has delivered to the Board of Directors of
          the Corporation a written opinion to the effect that the consideration
          provided by the Revised Offer is fair, from a financial point of view,
          to the holders of the Shares;

     (q)  The Board of Directors of the Corporation has concluded that the
          consideration provided by the Revised Offer is fair, from a financial
          point of view, to the holders of the Shares, has approved this
          Agreement and has determined to recommend, subject to Section 5
          hereof, that such holders accept the Revised Offer; and

     (r)  The Board of Directors of the Corporation has resolved to waive
          the application of the shareholder rights plan of the Corporation
          dated December 19, 2002 (the "Rights Plan") to the Revised Offer in
          order to allow the Offeror to proceed with the Revised Offer and
          take-up and pay for Shares deposited into the Revised Offer without
          any dilutive effects.

3.   COVENANTS

3.1  The Corporation covenants and agrees that, prior to the Effective
     Time, unless the Offeror shall otherwise agree in writing or as
     otherwise expressly contemplated or permitted by this Agreement:

     (a)  The Corporation shall, and shall cause each of its Subsidiaries
          to, conduct its business only in, not take any action except in, and
          maintain its facilities in, the usual, ordinary and regular course of
          business and consistent with past practice (except in respect of its
          European operations) and neither the Corporation nor any of its
          Subsidiaries shall make any material change to the conduct of such
          business or incur or commit to incur any material capital expenditure
          or settle any income tax audit with taxation authorities or make any
          material amendment to, or reset any amounts under, any material
          agreement to which it is a party or by which it is bound;

     (b)  The Corporation shall not directly or indirectly (including,
          without limitation, through a Subsidiary), do or permit to occur, or
          enter into any new agreement, proposal or commitment to do or permit
          to occur, any of the following:

          (i)  Issue, sell, pledge, lease, dispose of, or encumber:

               (A) Any additional shares of, or any options, warrants, calls,
                   conversion privileges or rights of the Corporation (other
                   than pursuant to the exercise of outstanding options and
                   other rights convertible or exchangeable into Common Shares
                   or entitling the



                                      -10-

                   holder thereof to acquire Common Shares
                   (other than the Rights Plan)) to purchase Shares; or

              (B)  Any assets of the Corporation or any of its Subsidiaries
                   except in the ordinary course of business or in connection
                   with the Special Retention Program disclosed in the
                   Directors' Circular;

         (ii)   Amend, or propose to amend, its articles or by-laws;

         (iii)  Split, combine or reclassify any outstanding Common Shares, or
                declare, set aside or pay any dividend or other distribution
                payable in cash, securities, property or otherwise with respect
                to the Common Shares, or change the exercise, conversion or
                exchange price or any other term of any outstanding options to
                purchase Common Shares or of any securities, instruments or
                rights convertible or exchangeable into Common Shares or
                entitling the holder thereof to acquire Common Shares;

         (iv)   Purchase or lease any asset the value of which is greater than
                $1,000,000;

         (v)    Redeem, purchase or offer to purchase any Common Shares or other
                securities of the Corporation, except in accordance with the
                terms thereof;

         (vi)   Reorganize, amalgamate or merge the Corporation or any of its
                Subsidiaries with any other person, company, partnership or
                other business organization whatsoever, except between the
                Corporation and its wholly-owned Subsidiaries;

         (vii)  Reduce the stated capital of any class of securities of the
                Corporation;

         (viii) Acquire or agree to acquire (by merger, amalgamation,
                acquisition of stock or assets or otherwise) any person,
                corporation, partnership or other business organization or
                division or make any investment either by purchase of shares or
                securities, contributions of capital, property transfer or
                purchase of, any property or assets of any other person,
                company, partnership or other business organization, except in
                the ordinary course of business; or

         (ix)   Create, incur, guarantee or indemnify against (or commit to do
                any of the foregoing) any indebtedness for borrowed money,
                except in connection with the Special Retention Program
                disclosed in the Directors' Circular, or any long term debt or
                other obligations or issue any debt securities or make any loans
                or advances;



                                      -11-

     (c)  Except as disclosed in the Directors' Circular, the Corporation shall
          not, nor shall it permit any of its Subsidiaries to:

          (i)   Enter into, or agree to enter into, any employment, severance or
                similar agreements or arrangements with, or grant, or agree to
                grant, any bonuses, salary increases, severance or termination
                pay to, any senior officers or directors; or

          (ii)  In the case of employees who are not officers or directors, take
                or agree to take any action other than in the ordinary, regular
                and usual course of business and consistent with past practice
                (none of which actions shall be unreasonable or unusual) with
                respect to the grant of any bonuses, salary increases, severance
                or termination pay or with respect to any increase of benefits
                payable in effect on the date hereof;

     (d)  Except as disclosed in the Directors' Circular, neither the
          Corporation nor any of its Subsidiaries shall adopt or amend, or agree
          to adopt or amend, the Corporation's stock option plan or any other
          bonuses, profit sharing, incentive, compensation, stock option,
          pension, retirement, deferred compensation, employment or other
          employee benefit plan, agreement, trust, fund or arrangement for the
          benefit or welfare of any employee;

     (e)  Pursuant to the Plan (as defined in the Directors' Circular), the
          Board of Directors of the Corporation shall provide that any options
          outstanding as at the date hereof, which are not then exercisable,
          shall become fully exercisable, and that as at the Effective Time, any
          option not exercised by an option holder prior to such time shall
          expire;

     (f)  The Corporation shall use its reasonable commercial efforts to cause
          its current insurance (or re-insurance) policies and those of its
          Subsidiaries (or any of them) not to be cancelled or terminated or any
          of the coverage thereunder to lapse, unless simultaneously with such
          termination, cancellation or lapse, replacement policies underwritten
          by insurance and reinsurance companies of nationally recognized
          standing providing coverage equal to or greater than the coverage
          under the cancelled, terminated or lapsed policies for substantially
          similar premiums are in full force and effect;

     (g)  Neither the Corporation nor any of its Subsidiaries shall enter into,
          materially breach or amend, modify or consent to any amendment,
          variation or departure or grant or transfer any rights of value from
          any material contract, agreement, commitment or arrangement or enter
          into any agreement with a term of longer than



                                      -12-

          twelve (12) months other than in the ordinary course of business
          consistent with past practice and as described in the
          Directors' Circular;

     (h)  The Corporation shall take all action prior to the Effective Time to
          waive the dilutive effects of the Rights Plan in order to allow the
          Offeror to proceed with the Revised Offer and take-up and pay for
          Shares deposited into the Revised Offer; and

     (i)  The Corporation shall use its reasonable commercial efforts to ensure
          that the representations and warranties contained herein remain true
          and accurate in all material respects during the term hereof.

3.2  The Offeror covenants and agrees that, unless the Corporation shall
     otherwise agree in writing or as otherwise expressly contemplated or
     permitted by this Agreement:

          (i)   if all of the conditions of the Revised Offer are either met or
                waived at or prior to the expiry of the Revised Offer, the
                Offeror shall take up the Shares deposited into the Revised
                Offer and pay for such Shares as soon as practicable after, and
                in any event within five business days of the first date on
                which the Offeror is permitted to do so under applicable
                Securities Laws;

          (ii)  in the event that the Offeror increases the consideration per
                Share offered under the Revised Offer (but, for greater
                certainty, excluding any greater consideration paid as a result
                of any proceeding in respect of fair value under the CBCA or any
                other Subsequent Acquisition Transition), the Offeror will pay
                such increased consideration to each holder of Shares in respect
                of all Shares tendered, notwithstanding that such Shares have
                previously been taken up and paid for by the Offeror;

          (iii) until the Effective Date, it shall not proceed with any material
                transaction out of the ordinary course of business which would
                be reasonably expected to result in a Material Adverse Change
                with respect to the Offeror;

          (iv)  the Offeror agrees not to amend, modify or change the Revised
                Offer without the prior written consent of the Corporation other
                than to increase the consideration under the Revised Offer, to
                waive any conditions to the Revised Offer, to extend the
                expiration date of the Revised Offer until a date or dates not
                later than February 3, 2003 or comply with the legal obligations
                of the Offeror with respect to any amendment, modification or
                change of the Revised Offer. The Offeror shall provide a draft
                of any



                                      -13-

                proposed amendment, modification or change to the Revised Offer
                to the Corporation and shall consult with the Corporation with
                respect to the terms and conditions of such proposed amendment,
                modification or change of the Revised Offer; and

          (v)   the Offeror further covenants that, if all of the conditions of
                the Revised Offer are either met or waived at or prior to the
                expiry of the Revised Offer:

                (A) the by-laws of the Corporation or of any corporation
                    continuing following the amalgamation, merger, plan of
                    arrangement, consolidation or winding-up of the Corporation
                    with or into one or more other persons (a "Surviving
                    Corporation") shall contain the provisions with respect to
                    indemnifications now set forth in the Corporation's by-law
                    which provisions shall not be amended, repealed or otherwise
                    modified for a period of six years from the Effective Date
                    in any manner that would adversely affect the rights
                    thereunder of individuals who, immediately prior to the
                    Effective Date, were directors, officers, employees or
                    agents of the Corporation, unless required by law, and the
                    Offeror shall ensure that the obligations of the Corporation
                    under any indemnification agreements between the Corporation
                    and its directors and certain officers are assumed by the
                    Surviving Corporation;

                (B) from the time that it first takes up and pays for Common
                    Shares under the Offer until the sixth anniversary of the
                    Effective Date, it will maintain or cause the Corporation or
                    any Surviving Corporation to maintain the Corporation's
                    current directors' and officers' insurance or another
                    insurance policy, on terms and conditions which are no less
                    advantageous to the directors and officers of the
                    Corporation and providing no less coverage than the
                    Corporation's existing directors' and officers' insurance,
                    for all present and former directors and officers of the
                    Corporation, covering claims made prior to or within such
                    period of time; and

                (C) it will cause the Corporation or any Surviving Corporation
                    to honour or perform its obligations pursuant to the Special
                    Retention Program and employment agreements referred to
                    under "Agreements between Cognicase and its directors and
                    senior officers" in the Directors' Circular.



                                      -14-

4.   TERMINATION, AMENDMENT AND WAIVER

4.1  This Agreement may be terminated, subject to Section 4.4:

     (a)  By mutual consent of the Offeror and the Corporation;

     (b)  By the Corporation if: (i) the Notice of Variation has not been mailed
          by the Notice of Variation Mailing Date; (ii) the Revised Offer (or
          any amendment thereto, other than an amendment that has been mutually
          agreed to by the parties) does not conform in all material respects
          with the description in Schedule A or any amendment thereof that has
          been mutually agreed to by the parties; (iii) by the Corporation at
          any time on or after the eleventh (11th) day following the expiry of
          the initial period during which the Revised Offer is open for
          acceptance if such Revised Offer is not extended as permitted
          hereunder (the "Initial Offer Period"), provided that the Offeror may
          extend the period during which the Revised Offer is open for
          acceptance by ten (10) days (the "Extended Offer Period") and for a
          further period of ten (10) days (the "Second Extended Offer Period"),
          as of the expiry of the Extended Offer Period, as the case may be, if,
          as of the expiry of the Initial Offer Period or the Extended Offer
          Period, any of the conditions of the Revised Offer have not been
          satisfied or waived by the Offeror and reasonable commercial efforts
          are being made by the Offeror or others to cause such conditions to be
          satisfied, in which event this Agreement may be terminated by the
          Corporation at any time on or after the expiry of the Second Extended
          Offer Period; (iv) the Revised Offer has been terminated, withdrawn or
          expired;

     (c)  By the Offeror if any condition in favour of the Offeror has not been
          satisfied or waived at the expiry of the Revised Offer (as the same
          may be extended) and the Offeror has not elected to waive such
          condition or extend the Revised Offer;

     (d)  By either the Offeror or the Corporation if any permanent order,
          decree, ruling or other action of a court or other competent authority
          restraining, enjoining or otherwise preventing the consummation of the
          Revised Offer shall have become final and non-appealable (provided
          that such right of termination shall not be available to any party if
          such party shall have failed to make reasonable efforts to prevent or
          consents to the imposition of such injunction or action and such
          failure materially contributed to such position);

     (e)  By either the Offeror or the Corporation at any time following the
          occurrence of a Fee Event (as hereinafter defined);



                                      -15-

     (f)  By the Offeror if any representation or warranty of the Corporation
          set out herein is untrue in any material respect or the Corporation is
          in default, in any material respect, of its obligations, covenants and
          agreements set out herein; and

     (g)  By the Corporation if any representation or warranty of the Offeror
          set out herein is untrue in any material respect or the Offeror is in
          default, in any material respect, of its obligations, covenants and
          agreements set out herein, including without limitation pursuant to
          Section 3.2(i).

4.2  This Agreement may not be amended except by an instrument in writing
     signed by each of the  parties hereto.

4.3  At any time and from time to time, either party hereto may:

     (a)  Extend the time for the performance of any of the obligations or other
          acts of the other party hereto; or

     (b)  Waive compliance with any of the agreements of the other party or with
          any conditions to its own obligation;

     in each case only to the extent such obligations, agreements and conditions
     are intended for its benefit.

4.4  If this Agreement is terminated as provided in Section 4.1, it shall become
     void except as to the obligation of the Corporation, if any, to pay the Fee
     provided for in Section 5.1, and there shall be no liability or further
     obligation on the part of any party hereto or any of their respective
     shareholders, officers or directors, except as set forth in Section 5.1 and
     except for liability arising from a breach of this Agreement.

5.   FEE, EXPENSES AND NO SHOP

5.1  Provided that the Offeror is not in breach of its material obligations,
     covenants and agreements under this Agreement, the Corporation agrees that
     if:

     (a)  The Board of Directors of the Corporation shall have modified or
          withdrawn in a manner adverse to the Offeror, its recommendation in
          favour of the Revised Offer;

     (b)  The Board of Directors of the Corporation shall have recommended to
          holders of Shares acceptance of a take-over bid or any other
          transaction other than the Revised Offer, including a Competing
          Proposal (as hereinafter defined);

     (c)  The Corporation shall have entered into a Proposed Agreement (as
          hereinafter defined);



                                      -16-

     (each of the foregoing events being a "Fee Event"), the Corporation shall
     pay to the Offeror an amount equal to $0.09 per Share which are the object
     of the Revised Offer (the "Fee") within five business days following the
     occurrence of such Fee Event.

5.2  NO SHOP:

     (a)  From and after the date hereof until this Agreement is terminated, the
          Corporation shall not, and shall use its reasonable commercial efforts
          to ensure that its directors, officers, employees, representatives,
          agents and advisors do not, directly or indirectly:

          (i)  Solicit, initiate, or engage in discussions or negotiations with
               any person, encourage submission of any inquiries, proposals or
               offers by, or take any other action intended or designed to
               facilitate the efforts of any person, other than the Offeror,
               relating to:

               (A)  The possible acquisition of, or business combination with,
                    the Corporation or any of its Subsidiaries (whether by way
                    of amalgamation, arrangement, consolidation, take-over bid,
                    purchase of shares, purchase of assets, or otherwise), other
                    than transactions between the Corporation and one or more of
                    its wholly-owned Subsidiaries or between one or more of the
                    Corporation's wholly-owned Subsidiaries;

               (B)  The possible acquisition of any material portion of its
                    securities or assets or those of any of its Subsidiaries,
                    other than transactions between the Corporation and one or
                    more of its wholly-owned Subsidiaries or between one or more
                    of the Corporation's wholly-owned Subsidiaries; or

               (C)  Any take-over bid, stock exchange take-over bid or other
                    purchase or acquisition of equity securities that, if
                    consummated, would result in any person beneficially owning
                    10% or more of any class of securities of the Corporation;

     (any of the foregoing, a "Competing Proposal"); or

          (ii) Provide any information with respect to the Corporation or any of
               its Subsidiaries, or afford any access to the properties, books
               or records of the Corporation or any of its Subsidiaries, to any
               person, other than the Offeror, that may wish to propose or
               pursue a Competing Proposal;



                                      -17-

     provided, however, that, if in response to an unsolicited bona fide inquiry
     or proposal from a third party with whom the Corporation deals at arm's
     length (as such term is interpreted for purposes of the Income Tax Act
     (Canada)) the Corporation determines in good faith that a failure to so
     respond would be inconsistent with the Board of Directors' fiduciary
     obligations under applicable law (having received advice from outside legal
     counsel to such effect) and could reasonably be expected to result in a
     Superior Proposal being made by such party, the Corporation may:

               (A)  Furnish information with respect to the Corporation and any
                    of its Subsidiaries to the person making such inquiry or
                    proposal pursuant to a customary confidentiality agreement
                    including standstill provision for a minimum period of six
                    months with such person; and

               (B)  Participate in discussions or negotiations regarding such
                    Competing Proposal.

     Subject to the exception contained in the immediately preceding paragraph
     in response to an unsolicited bona fide inquiry or proposal from a third
     party with whom the Corporation deals at arm's length, the Corporation and
     its directors, officers, employees, representatives, agents and advisors
     shall immediately cease any and all activities, discussions or negotiations
     with any parties conducted heretofore with respect to any of the actions
     mentioned in paragraphs 5.2(a)(i) and 5.2(a)(ii).

     (b)  The Corporation shall immediately advise the Offeror orally and in
          writing of any Competing Proposal;

     including the material terms and conditions of such Competing Proposal or
     with respect to which such action is taken and whether or not the
     Corporation believes any Competing Proposal so reported is a Superior
     Proposal.

     The Corporation will keep the Offeror fully and timely informed of the
     status and details (including amendments or proposed amendments) of any
     such Competing Proposal.

     (c)  The Corporation covenants that it will not enter into any agreement
          regarding a Superior Proposal (a "Proposed Agreement") pursuant to the
          provision contained in this Section 5 without providing the Offeror
          with a copy of the Proposed Agreement, together with details in
          writing of such agreement, not less than three business days prior to
          the proposed date of execution of the Proposed Agreement by the
          Corporation. If the Offeror does not agree to and does not announce
          publicly and increase the consideration under the Revised Offer to an
          amount that is at least equal to that offered under the Proposed
          Agreement within those three



                                      -18-

          business days, the Corporation will be entitled to enter into the
          Proposed Agreement, subject to the payment of the Fee, as provided
          in Section 5.1.

6.   GENERAL PROVISIONS

6.1  Subject to the conditions herein provided, each of the parties hereto
     agrees to use all reasonable efforts to take, or cause to be taken, all
     actions and to do, or cause to be done, all things necessary, proper or
     advisable to consummate and make effective, as promptly as is practicable,
     the transactions contemplated by the Revised Offer and this Agreement,
     including the execution and delivery of such documents as the other party
     hereto may reasonably require, and use its reasonable commercial efforts to
     obtain all necessary waivers, consents and approvals, and to effect all
     necessary registrations and filings, including, but not limited to, filings
     under the applicable laws and submissions of information requested by
     governmental authorities. Each of the parties hereto, where appropriate,
     shall reasonably co-operate with the other party in taking such actions.

6.2  Each party shall give prompt notice to the other of:

     (a)  The occurrence or failure to occur of any event, which occurrence or
          failure would cause or may cause any representation or warranty on its
          part contained in this Agreement to be untrue or inaccurate in any
          respect at any time; and

     (b)  Any failure of such party, or any officer, director, employee or agent
          thereof, to comply with or satisfy any covenant, condition or
          agreement to be complied with or satisfied by it hereunder.

6.3  Except as required by applicable law, neither the Offeror nor the
     Corporation shall make any public announcement or statement with respect to
     the Revised Offer or this Agreement, without the approval of the
     Corporation or the Offeror, as the case may be. Moreover, each party agrees
     to give prior notice to the other of any public announcement relating to
     the Revised Offer or affairs of the Corporation, and agrees to consult with
     the other prior to issuing any such public announcement.

6.4  Each party hereto shall pay its own legal and financial advisors and other
     expenses incurred in connection with this Agreement and the Revised Offer.

6.5  All notices, requests, demands and other communications hereunder shall be
     deemed to have been duly given and made if in writing and if delivered, or
     if sent by telecopier, upon receipt of confirmation that such transmission
     has been received, to the person at the address or telecopier number set
     forth below, or such other address or telecopier number as may be
     designated in writing hereafter, in the same manner, by such person:



                                      -19-

     (a)  If to the Offeror:

          CGI GROUP INC.
          1130 Sherbrooke Street West
          5th Floor
          Montreal, Quebec
          H3A 2M8

          Attention:      Serge Godin
                          Chairman of the Board and Chief
                          Executive Officer

          Telecopier No.: (514) 841-3294

          with a copy to:

          MCCARTHY  TETRAULT LLP
          Barrister and  Solicitors
          "Le Windsor"
          1170 Peel Street
          Montreal, Quebec
          H3B 4S8

          Attention:      Jean-Rene Gauthier

          Telecopier No.: (514) 875-6246

          If to the Corporation:

          COGNICASE INC.
          The Cite Multimeeia
          111 Duke Street
          9th Floor
          Montreal, Quebec
          H2C 2M1

          Attention:      Ronald Brisebois
                          President, Chief Executive Officer and
                          Chairman of the Board

          Telecopier No.: (514) 228-8955



                                      -20-

          With a copy to:

          OGILVY RENAULT
          Barrister and Solicitors
          1981 McGill College Avenue
          11th Floor
          Montreal, Quebec
          H3A 3C1

          Attention:      Paul Raymond

          Telecopier No.: (514) 286-5474

6.6  The representations, warranties and agreements of this Agreement shall
     terminate at the Effective Time of the Revised Offer or upon termination of
     this Agreement pursuant to Section 4, subject to Section 4.4.

6.7  The headings contained in this Agreement are for reference purposes only
     and shall not affect in any way the meaning or interpretation of this
     Agreement. References to Sections refer to sections of this Agreement
     unless otherwise stated. Unless the context otherwise requires, words used
     herein importing the singular include the plural and vice versa.

6.8  If any term, provision, covenant or restriction of this Agreement is held
     by a court of competent jurisdiction to be invalid, void or unenforceable,
     the remainder of the terms, provisions, covenants and restrictions of this
     Agreement shall remain in full force and effect and shall in no way be
     affected, impaired or invalidated and the parties shall negotiate in good
     faith to modify the Agreement to preserve each party's anticipated benefits
     under the Agreement.

6.9  Each of the parties recognizes and acknowledges that this Agreement is an
     integral part of the transactions contemplated in the Revised Offer, that
     the Offeror would not contemplate causing the Revised Offer to be made, and
     the Corporation would not agree to facilitate the Revised Offer, unless
     this Agreement was executed and that a breach by a party of any covenants
     or other commitments contained in this Agreement will cause the other party
     to sustain injury for which it would not have an adequate remedy at law for
     money damages. Therefore, each of the parties agrees that in the event of
     any such breach, the aggrieved party shall be entitled to the remedy of
     specific performance of such covenants or commitments and preliminary and
     permanent injunctive and other equitable relief in addition to any other
     remedy to which it may be entitled, at law or in equity, and the parties
     further agree to waive any requirement for the securing or posting of any
     bond in connection with the obtaining of any such injunctive or other
     equitable relief.



                                      -21-

6.10 This Agreement:

     (a)  Constitutes the entire agreement, and supersedes all other prior
          agreements and undertakings, both written and oral, among the parties
          with respect to the subject matter hereof;

     (b)  Is not intended to confer upon any other person any rights or remedies
          hereunder;

     (c)  Shall not be assigned by operation of law or otherwise; and

     (d)  Shall be governed in all respects, including validity, interpretation
          and effect, by the laws of the Province of Quebec and the laws of
          Canada applicable therein, without giving effect to the principles of
          conflict of laws thereof.

6.11 Time shall be of the essence hereof.

6.12 This Agreement may be executed in any number of counterparts, each of
     which shall be deemed to be original and all of which taken together
     shall be deemed to constitute one and the same instrument.



                                      -22-

                                       Yours very truly,

                                       CGI GROUP INC.

                                       By: (SIGNED) SERGE GODIN
                                           ----------------------------------
                                           Serge Godin, Chairman of the Board
                                           and Chief Executive Officer

The foregoing is hereby accepted and agreed to on January 1, 2003.

COGNICASE INC.


By:  (SIGNED) J.V. RAYMOND CYR
    -----------------------------------------
     J.V. Raymond Cyr
     Director and Chairman of the Special Committee
     of the Board of Directors



                                   SCHEDULE A

THE REVISED OFFER

1.   The terms and conditions of the Revised Offer shall be those contained
     in the Initial Offer, as amended as follows:

     (A)  The consideration payable under the Revised Offer shall be increased
          from $4.25 to $4.50 per Share and the Maximum Cash Consideration (as
          defined in the Initial Offer) shall mean an amount in cash equal to
          56% of the total consideration payable pursuant to the Revised Offer
          on any Take-Up Date (as defined in the Initial Offer) and the Maximum
          Share Consideration (as defined in the Initial Offer) shall mean such
          number of CGI Shares (as defined in the Initial Offer) of the Offeror
          having an aggregate value equal to 44% of the total consideration
          payable pursuant to the Revised Offer on any Take-Up Date using a CGI
          Share price of $7.13 (or 0.6311 CGI Shares for each Share);

     (B)  The conditions of the Initial Offer contained under Section 4
          "CONDITIONS OF THE OFFER" in the Initial Offer shall be modified so
          that they read as follows:

          "(a) there shall have been validly deposited under the Offer and not
               withdrawn at least (i) 66?% of the outstanding Cognicase Shares
               and (ii) 50.01% of the outstanding Cognicase Shares other than
               those Cognicase Shares held by persons whose Cognicase Shares
               would not be included as part of the "minority" in connection
               with any Subsequent Acquisition Transaction (collectively, the
               "Minimum Condition");

          (b)  all outstanding Rights which are, by their terms, accelerated or
               vested by reason of the Offer (without any third-party
               notification) and all outstanding Options shall have been
               exercised in full by the beneficiaries or holders thereof,
               converted, cancelled or otherwise dealt with in a manner
               satisfactory to the Offeror, in its entire discretion;

          (c)  the waiting period pursuant to Section 123 of the Competition Act
               shall have expired or been earlier terminated and the Offeror
               shall not have received a letter from the Commissioner of
               Competition, or his authorized representative, indicating that
               the Commissioner intends to make an application under Section 92
               of the Competition Act;

          (d)  any applicable waiting periods under the HSR Act shall have
               expired or been earlier terminated;



                                      -2-

          (e)  all material necessary regulatory approvals (including, without
               limitation, those of any stock exchange or other regulatory
               authorities), other than those listed in paragraphs (c) and (d)
               above, will have been obtained or concluded on terms satisfactory
               to the Offeror, acting reasonably, and any applicable
               governmental or regulatory waiting periods shall have expired or
               been terminated;

          (f)  (i) no act, action, suit or proceeding shall have been threatened
               to be taken or taken before or by any domestic or foreign
               arbitrator, court or tribunal or governmental agency or other
               regulatory authority or administrative agency or commission or by
               any elected or appointed public official or private person
               (including, without limitation, any individual, company, firm,
               group or other entity) in Canada or elsewhere, whether or not
               having the force of law, and (ii) no law, regulation, rule or
               policy shall have been proposed, enacted, promulgated or applied,
               in the case of either (i) or (ii) above:

               (A)  to cease trade, enjoin, prohibit or impose material
                    limitations or conditions on the purchase by or the sale to
                    the Offeror of any of the Cognicase Shares or the rights of
                    the Offeror to own or exercise full rights of ownership of
                    all of the Cognicase Shares; or

               (B)  which, if the Offer was consummated, could materially
                    adversely affect Cognicase and its Subsidiaries considered
                    on a consolidated basis;

          (g)  there shall not exist any prohibition at law against the Offeror
               making the Offer or taking up and paying for the Cognicase Shares
               deposited under the Offer;

          (h)  all of the material covenants and obligations of the Corporation
               set out in the Support Agreement shall have been complied with on
               or before the date on which the Offeror takes up Cognicase Shares
               deposited under the Offer; and

          (i)  no representation or warranty of the Corporation in the Support
               Agreement shall be, as of the date on which the Offeror takes up
               Cognicase Shares deposited under the Offer, untrue or incorrect
               in any material respect and all of the covenants and obligations
               of the Corporation set out in the Support Agreement shall have
               been complied with on or before such date in all material
               respects."



                                   SCHEDULE B

                                   DEFINITIONS

"AGREEMENT" means the agreement of which this Schedule forms part and includes
all Schedules thereto;

"CBCA" the Canada Business Corporations Act;

"COMMON SHARES" means common shares in the share capital of the Corporation;

"COMPULSORY ACQUISITION" means a transaction pursuant to any statutory right to
acquire Common Shares following the completion of a take-over bid or similar
transaction;

"DIRECTORS' CIRCULAR" means the directors' circular of the Corporation dated
December 19, 2002;

"EFFECTIVE DATE" means the date on which the Offeror first acquires Shares under
the Revised Offer;

"EFFECTIVE TIME" means the time of take-up of Shares on the Effective Date;

"INITIAL OFFER" means the offer to purchase all outstanding Shares dated
December 6, 2002, as amended on December 16, 2002 and December 18, 2002;

"LOCK-UP AGREEMENT" means the lock-up agreement entered into between the Offeror
and National Bank of Canada on December 6, 2002;

"MATERIAL ADVERSE CHANGE" means, in relation to any corporation, any change (or
any condition, event or development involving a prospective change) in the
business, operations, affairs, assets, liabilities (including any contingent
liabilities that may arise through outstanding, pending or threatened litigation
or otherwise), capitalization, financial condition, licenses, permits, rights or
privileges, or prospects of the corporation or any of its Subsidiaries which
would reasonably be expected to materially and adversely affect the corporation
and its Subsidiaries taken as a whole;

"SECURITIES LAWS" means the Securities Act (Quebec) and all other applicable,
Canadian or U.S. provincial, federal or state securities laws and the respective
regulations and rules made thereunder together with all applicable policy
statements, instruments, notices, interpretation notes and blanket orders and
rulings of the relevant securities commissions and similar regulatory
authorities;



                                      -2-

"SHARES" means all outstanding Common Shares (including any Common Shares which
may become outstanding pursuant to the exercise of outstanding stock options to
acquire Common Shares and pursuant to any other securities, instruments and
rights convertible or exchangeable into Common Shares or entitling the holder
thereof to acquire Common Shares);

"SUBSEQUENT ACQUISITION TRANSACTION" means any transaction involving the
Offeror, whether by amalgamation, statutory arrangement or otherwise, pursuant
to which the Offeror acquires all of the Shares not deposited under the Revised
Offer and includes a Compulsory Acquisition;

"SUBSIDIARIES" has the meaning ascribed to such term in the Securities Act
(Quebec); and

"SUPERIOR PROPOSAL" shall mean any bona fide written Competing Proposal from a
third party with whom the Corporation deals at arms' length (as such term is
interpreted for purposes of the Income Tax Act (Canada)) that has the following
characteristics: (i) is a proposal to acquire, directly or indirectly, (x) not
less than 50% of the outstanding Shares, or (y) all or substantially all of the
assets and liabilities of the Corporation or its Subsidiaries; (ii) the Board of
Directors of the Corporation shall have determined in good faith (after
receiving an opinion of the Financial Advisor) that such proposal provides
consideration, on a cash equivalent basis, to holders of Shares that is in
excess of the consideration provided by the Revised Offer (after taking into
account any amendments to the Revised Offer made by the Offeror) to holders of
Shares; and (iii) the transactions envisioned by such proposal, in the good
faith judgment of the Board of Directors of the Corporation are readily
financeable and are reasonably likely to be consummated without unreasonable
delay compared to the Revised Offer.