<PAGE>

                                                                   EXHIBIT 10.35

THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY
NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF A
REGISTRATION STATEMENT IN EFFECT WITH RESPECT TO THE SECURITIES UNDER SUCH ACT
OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS
NOT REQUIRED. THIS WARRANT IS FURTHER SUBJECT TO THE RESTRICTIONS ON
TRANSFERABILITY SET FORTH IN SECTION 7(c) HEREOF.

                                                                  March 31, 2002

                        WARRANT TO PURCHASE COMMON STOCK
                                       of
                                 MIGRATEC, INC.
            Void after March 30, 2005, subject to Section 3(a) hereof

         This certifies that, for value received, Richard A. Gray, Jr., or
registered assigns ("Holder"), is entitled, subject to the terms set forth
below, to purchase from MigraTEC, Inc., a Delaware corporation (the "Company"),
a total of 175,450 fully paid and nonassessable shares of Common Stock, par
value $.001 per share, of the Company ("Common Shares"), as constituted on the
date hereof (the "Warrant Issue Date"), upon surrender hereof, at the principal
office of the Company referred to below, with the subscription form attached
hereto duly executed, and simultaneous payment therefore in lawful money of the
United States or otherwise as hereinafter provided, at the Exercise Price as set
forth in Section 2 hereof. The number, character and Exercise Price of such
Common Shares are subject to adjustment as provided below. The term "Warrant" as
used herein shall include this Warrant and any warrants delivered in
substitution or exchange therefore as provided herein.

         1. Term of Warrant. Subject to the terms and conditions set forth
herein, this Warrant shall be exercisable during the term commencing on the
first anniversary of the Warrant Issue Date and ending at 5:00 p.m., Central
Standard Time, on the third anniversary of the Warrant Issue Date, and shall be
void thereafter.

         2. Exercise Price. The exercise price (the "Exercise Price") at which
this Warrant may be exercised shall be $0.25 per Common Share, as adjusted from
time to time pursuant to Section 8 hereof.

         3. Exercise of Warrant.

                  (a) This Warrant shall be exercisable by the Holder, in whole
         or in part, at any time until this Warrant expires as described in
         Section 1 hereof, by the surrender of this Warrant and the Notice of
         Exercise annexed hereto duly completed and executed on behalf of the
         Holder, at the office of the Company (or such other office or agency of
         the Company as it may designate by notice in writing to the Holder at
         the address of the Holder appearing on the books of the


WARRANT TO PURCHASE COMMON STOCK - PAGE 1
<PAGE>


         Company), upon payment (i) in cash or by check acceptable to the
         Company, (ii) by cancellation by the Holder of indebtedness of the
         Company to the Holder, or (iii) by a combination of (i) and (ii), of
         the purchase price of the Common Shares to be purchased.

                  (b) This Warrant shall be deemed to have been exercised
         immediately prior to the close of business on the date of its surrender
         for exercise as provided in Section 3(a) hereof, and the person
         entitled to receive the Common Shares issuable upon such exercise shall
         be treated for all purposes as the holder of record of such shares as
         of the close of business on such date. As promptly as practicable on or
         after such date and in any event within ten (10) days thereafter, the
         Company at its expense shall issue and deliver to the person or persons
         entitled to receive the same a certificate or certificates for the
         number of shares issuable upon such exercise.

                  (c) If the Warrant has been exercised in part, the Company
         will, at the time of delivery of such certificate or certificates,
         deliver to the Holder a new Warrant evidencing the rights of the Holder
         to purchase a number of Common Shares with respect to which the Warrant
         has not been exercised, which new Warrant will, in all other respects,
         be identical with this Warrant, or, at the request of the Holder,
         appropriate notation may be made on this Warrant and this Warrant
         returned to the Holder.

         4. No Fractional Shares or Scrip. No fractional shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant. In lieu of any fractional share to which the Holder would otherwise be
entitled, the Company shall make a cash payment equal to the Exercise Price
multiplied by such fraction.

         5. Replacement of Warrant. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and, in the case of loss, theft or destruction, on delivery of an
indemnity agreement reasonably satisfactory in form and substance to the Company
or, in the case of mutilation, on surrender and cancellation of this Warrant,
the Company at its expense shall execute and deliver, in lieu of this Warrant, a
new warrant of like tenor and amount.

         6. Rights of Shareholders. Subject to Sections 8 and 10 hereof, the
Holder shall not be entitled to vote or receive dividends or be deemed the
holder of Common Shares or any other securities of the Company that may at any
time be issuable on the exercise hereof for any purpose, nor shall anything
contained herein be construed to confer upon the Holder, as such, any of the
rights of a member of the Company or any right to vote upon any matter submitted
to members at any meeting thereof, or to give or withhold consent to any
corporate action (whether upon any recapitalization, issuance of stock
reclassification of stock, change of par value, or change of stock to no par
value, consolidation, merger, conveyance or otherwise) or to receive notice of
meetings, or to receive dividends or subscription rights or otherwise until the
Warrant shall have been exercised as provided herein.


WARRANT TO PURCHASE COMMON STOCK - PAGE 2
<PAGE>


         7. Transfer of Warrant.

         (a) Warrant Register. The Company will maintain a register (the
"Warrant Register") containing the names and addresses of the Holder or Holders.
Any Holder of this Warrant or any portion thereof may change his address as
shown on the Warrant Register by written notice to the Company requesting such
change. Any notice or written communication required or permitted to be given to
the Holder may be delivered or given by mail to such Holder as shown on the
Warrant Register and at the address shown on the Warrant Register. Until this
Warrant is transferred on the Warrant Register of the Company, the Company may
treat the Holder as shown on the Warrant Register as the absolute owner of this
Warrant for all purposes, notwithstanding any notice to the contrary.

         (b) Warrant Agent. The Company may, by written notice to the Holder,
appoint an agent for the purpose of maintaining the Warrant Register referred to
in Section 7(a) hereof, issuing the Common Shares or other securities then
issuable upon the exercise of this Warrant, exchanging this Warrant, replacing
this Warrant, or any or all of the foregoing. Thereafter, any such registration,
issuance, exchange, or replacement, as the case may be, shall be made at the
office of such agent.

         (c) Transferability of Warrant and Shares Issued on Exercise. This
Warrant and the Common Shares or any other securities of the Company that may at
any time be issued on the exercise of this Warrant may not be transferred or
assigned without compliance with all applicable federal and state securities
laws by the transferor and the transferee (including the delivery of investment
representation letters and legal opinions reasonably satisfactory to the
Company, if such are requested by the Company). Subject to the provisions of
this Warrant with respect to compliance with the Securities Act of 1933, as
amended (the "Act"), and applicable state securities laws, this Warrant and the
Common Shares or any other securities of the Company that may at any time be
issued on the exercise of this Warrant may be transferred by endorsement (by the
Holder executing the Assignment Form annexed hereto) and delivery of the same.

         (d) Exchange of Warrant Upon a Transfer. On surrender of this Warrant
for exchange, properly endorsed on the Assignment Form and subject to the
provisions of this Warrant with respect to compliance with the Act and with the
limitations on assignments and transfers and contained in this Section 7, the
Company at its expense shall issue to, or on the order of, the Holder a new
warrant or warrants of like tenor, in the name of the Holder, or as the Holder
(on payment by the Holder of any applicable transfer taxes) may direct, for the
number of shares issuable upon exercise hereof.

         (e) Compliance with Securities Laws and Legends.

                  (i) The Holder of this Warrant, by acceptance hereof,
         acknowledges that this Warrant and the Common Shares or any other
         securities of the Company that may at any time be issued upon exercise
         hereof are being acquired solely for the Holder's own account and not
         as a nominee for any other party, and for investment, and that the
         Holder will not offer, sell or otherwise dispose of this Warrant or any
         Common Shares or any other securities of the Company that may at any
         time be issued upon exercise hereof except under circumstances that
         will not result in a violation of the Act or any state securities laws.
         Upon exercise of this Warrant, the Holder shall, if requested by the
         Company, confirm in writing, in a form satisfactory to the Company,
         that the Common Shares


WARRANT TO PURCHASE COMMON STOCK - PAGE 3
<PAGE>


         or other securities so purchased are being acquired solely for the
         Holder's own account and not as a nominee for any other party, for
         investment, and not with a view toward distribution or resale.

                  (ii) All Common Shares or any other securities of the Company
         that may at any time be issued upon exercise hereof or conversion
         thereof shall be stamped or imprinted with a legend in substantially
         the following form (in addition to any legend required by state
         securities laws):

                  THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO CERTAIN
                  RESTRICTIONS ON TRANSFER AND HAVE BEEN ACQUIRED FOR INVESTMENT
                  AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
                  AS AMENDED, OR ANY APPLICABLE STATE SECURITIES LAWS, AND MAY
                  NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED UNLESS AND UNTIL
                  SUCH SECURITIES ARE REGISTERED UNDER SUCH ACT, OR SUCH STATE
                  LAWS, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY IS
                  OBTAINED TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED.
                  COPIES OF THE AGREEMENT COVERING THE PURCHASE OF THESE
                  SECURITIES AND RESTRICTING THEIR TRANSFER OR SALE MAY BE
                  OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER OF
                  RECORD HEREOF TO THE SECRETARY OF THE COMPANY AT THE PRINCIPAL
                  EXECUTIVE OFFICES OF THE COMPANY.

         8. Adjustments. The Exercise Price and the number of shares purchasable
hereunder are subject to adjustment from time to time as follows

                  8.1. Merger, Sale of Assets, etc. If at any time while this
         Warrant is outstanding and unexpired there shall be (i) a
         reorganization (other than a combination, reclassification, exchange or
         subdivision of shares otherwise provided for herein), (ii) a merger or
         consolidation of the Company with or into another corporation in which
         the Company is not the surviving entity, or a reverse triangular merger
         in which the Company is the surviving entity but the shares of the
         Company's capital stock outstanding immediately prior to the merger are
         converted by virtue of the merger into other property, whether in the
         form of securities, cash, or otherwise, or (iii) a sale or transfer of
         the Company's properties and assets as, or substantially as, an entity
         to any other person, then, prior to such reorganization, merger,
         consolidation, sale or transfer, the holder of this Warrant may
         exercise this Warrant, during the period specified herein and upon
         payment of the Exercise Price then in effect, and in the event that any
         of the purchase rights represented by this Warrant have not yet vested
         in accordance with Section 3(a) hereof prior to such reorganization,
         merger, consolidation, sale or transfer, at the option of the new
         entity created by such reorganization, merger or consolidation or the
         purchaser or transferee in such sale or transfer, (A) the purchase
         rights represented by this Warrant shall vest effective immediately
         prior to the effective date of such reorganization, merger,
         consolidation, sale or transfer or (B) such new entity, purchaser or
         transferee shall issue a new warrant to purchase shares of such entity
         on similar terms


WARRANT TO PURCHASE COMMON STOCK - PAGE 4
<PAGE>


         as contained in this Warrant effective as of the closing of such
         reorganization, merger, consolidation, sale or transfer.

                  8.2. Reclassification. If the Company, at any time while this
         Warrant remains outstanding and unexpired, by reclassification of
         securities or otherwise, shall change any of the securities as to which
         purchase rights under this Warrant exist into the same or different
         number of securities of any class or classes, this Warrant shall
         thereafter represent the right to acquire such number and kind of
         securities as would have been issuable as the result of such change
         with respect to the securities that were subject to the purchase rights
         under this Warrant immediately prior to such reclassification or other
         change and the Exercise Price therefor shall be appropriately adjusted,
         all subject to further adjustment as provided in this Section 8.

                  8.3. Split, Subdivision or Combination of Shares. If the
         Company at any time while this Warrant remains outstanding and
         unexpired shall split, subdivide or combine the securities as to which
         purchase rights under this Warrant exist, into a different number of
         securities of the same class, the number of Common Shares issuable upon
         exercise of this Warrant shall be proportionately increased in the case
         of a split or subdivision or proportionately decreased in the case of a
         combination and the Exercise Price for such securities shall be
         proportionately decreased in the case of a split or subdivision or
         proportionately increased in the case of a combination.

                  8.4. Adjustments for Dividends in Other Securities or
         Property. If while this Warrant remains outstanding and unexpired the
         holders of the securities as to which purchase rights under this
         Warrant exist at the time shall have received, or, on or after the
         record date fixed for the determination of eligible members, shall have
         been entitled to receive, without payment therefor, other or additional
         securities or property (other than cash) of the Company by way of
         dividend, then and in each case, this Warrant shall represent the right
         to acquire, in addition to the number of shares of the security
         receivable upon exercise of this Warrant, and without payment of any
         additional consideration therefor, the amount of such other or
         additional consideration therefor, the amount of such other or
         additional securities or property (other than cash) of the Company that
         such holder would hold on the date of such exercise had it been the
         holder of record of the security receivable upon exercise of this
         Warrant on the date hereof and had thereafter, during the period from
         the date hereof to and including the date of such exercise, retained
         such shares and/or all other securities available by it as aforesaid
         during such period, giving effect to all adjustments called for during
         such period by the provisions of this Section 8.

                  8.5. Certificate as to Adjustments. Upon the occurrence of
         each adjustment or readjustment pursuant to this Section 8, the Company
         at its expense shall promptly compute such adjustment or readjustment
         in accordance with the terms hereof and furnish to each Holder of this
         Warrant a certificate setting forth such adjustment or readjustment and
         showing in detail the facts upon which such adjustment or readjustment
         is based. The Company shall, upon the written request, at any time, of
         any such Holder, furnish or cause to be furnished to such Holder a like
         certificate setting forth: (i) such adjustments and readjustments; (ii)
         the Exercise Price at the time



WARRANT TO PURCHASE COMMON STOCK - PAGE 5
<PAGE>


         in effect; and (iii) the number of Common Shares and the amount, if
         any, of other property that at the time would be received upon the
         exercise of the Warrant.

                  8.6. No Impairment. The Company will not, by any voluntary
         action, avoid or seek to avoid the observance or performance of any of
         the terms to be observed or performed hereunder by the Company, but
         will at all times in good faith assist in the carrying out of all the
         provisions of this Section 8 and in the taking of all such action as
         may be necessary or appropriate in order to protect the rights of the
         Holders of this Warrant against impairment.

         9. Reservation of Stock. The Company covenants that during the term
this Warrant is exercisable, the Company will reserve from its authorized and
unissued Common Shares a sufficient number of shares to provide for the issuance
of Common Shares upon the exercise of this Warrant. The Company further
covenants that all shares that may be issued upon the exercise of rights
represented by this Warrant, upon exercise of the rights represented by this
Warrant and payment of the Exercise Price, all as set forth herein, will be free
from all taxes, liens and charges in respect of the issue thereof (other than
taxes in respect of any transfer occurring contemporaneously or otherwise
specified herein). The Company agrees that its issuance of this Warrant shall
constitute full authority to its officers who are charged with the duty of
executing certificates representing Common Shares to execute and issue the
necessary certificates for Common Shares upon the exercise of this Warrant.

         10. Notices.

                  (a) Whenever the Exercise Price or number of shares
         purchasable hereunder shall be adjusted pursuant to Section 8 hereof,
         the Company shall issue a certificate signed by its President and Chief
         Financial Officer or any manager setting forth, in reasonable detail,
         the event requiring the adjustment, the amount of the adjustment, the
         method by which such adjustment was calculated, and the Exercise Price
         and number of shares purchasable hereunder after giving effect to such
         adjustment, and shall cause a copy of such certificate to be mailed (by
         certified or registered mail, return receipt requested) to the Holder
         of this Warrant.

                  (b) In case:

                           (i) the Company shall take a record of the holders of
                  its Common Shares (or other stock or securities at the time
                  receivable upon the exercise of this Warrant) for the purpose
                  of entitling them to receive any dividend or other
                  distribution, or any right to subscribe for or purchase any
                  shares of stock of any class or any other securities, or to
                  receive any other right; or

                           (ii) of any capital reorganization of the Company,
                  any reclassification of the securities of the Company, any
                  public offering of Common Shares, any consolidation or merger
                  of the Company with or into another corporation, or any
                  conveyance of all or substantially all of the assets of the
                  Company to another corporation; or


WARRANT TO PURCHASE COMMON STOCK - PAGE 6
<PAGE>


                           (iii) of any voluntary dissolution, liquidation or
                  winding-up of the Company;

         then, and in each such case, the Company will mail or cause to be
         mailed, registered or certified mail, return receipt requested, to the
         Holder or Holders a notice specifying, as the case may be, (A) the date
         on which a record is to be taken for the purpose of such dividend,
         distribution or right, and stating the amount and character of such
         dividend, distribution or right, or (B) the date on which such
         reorganization, reclassification, public offering, consolidation,
         merger, conveyance, dissolution, liquidation or winding-up is to take
         place, and the time, if any is to be fixed, as of which the holders of
         record of Common Shares (or such securities at the time receivable upon
         the exercise of this Warrant) shall be entitled to exchange their
         Common Shares (or such other securities) for securities or other
         property deliverable prior to or upon such reorganization,
         reclassification, offering, consolidation, merger, conveyance,
         dissolution, liquidation or winding-up. Such notice shall be mailed at
         least 45 days prior to the date therein specified. The Holder of this
         Warrant shall notify the Company of its election to exercise this
         Warrant within 20 days after the date of the Company's notice.

                  (c) All such notices, advice and communications shall be
         deemed to have been received on the date of receipt by the person to
         whom it is addressed.

         11. Indemnification. The Holder agrees to indemnify, to the extent
permitted by law, the Company and its officers and directors against all losses,
claims, damages, liabilities, expenses and obligations which arise out of or are
based on an assertion that the Company must provide compensation to any entity
affiliated with Holder or which is party to a contract with Holder (other than
the Company) as a result of the Company's issuance of this Warrant to Holder;
provided that, the Holder's duty to indemnify shall be limited to and shall not
exceed the Holder assigning the Holder's right in and to this Warrant and to any
Common Shares purchased upon the exercise of all or part of this Warrant to the
Company or such other indemnitees.

         12. Registration Rights. Upon exercise of this Warrant, the Holder
shall have and be entitled to exercise "piggy-back" registration rights in
connection with certain registrations effected by the Company.

         13. Amendments.

                  (a) Any term of this Warrant may be amended with the written
         consent of the Company and the holders of the Warrants representing not
         less than a majority of the Common Shares issuable upon exercise of any
         and all outstanding Warrants. Any amendment effected in accordance with
         this Section 13 shall be binding upon each holder of any of the
         Warrants, each future Holder of all such Warrants, and the Company;
         provided, however, that no special consideration or inducement may be
         given to any such Holder in connection with such consent that is not
         given ratably to all such holders, and that such amendment must apply
         to all such Holders equally and ratably in accordance with the number
         of Common Shares issuable upon exercise of their Warrants. The Company
         shall promptly give notice to all Holders of Warrants of any amendment
         effected in accordance with this Section 13.


WARRANT TO PURCHASE COMMON STOCK - PAGE 7
<PAGE>


                  (b) No waivers of, or exceptions to, any term, condition or
         provision of this Warrant, in any one or more instances, shall be
         deemed to be, or construed as, a further or continuing waiver of any
         such term, condition or provision.

         14. Authority. This Warrant has been duly authorized and executed by
the Company and constitutes the valid and binding obligation of the Company.

         15. Miscellaneous.

                  15.1. Successors and Assigns. All the covenants and agreements
         made by the Company in this Warrant shall bind its successors and
         assigns.

                  15.2. No Waiver. No course of dealing between the Company and
         the Holder hereof shall operate as a waiver of any right of any holder
         hereof, and no delay on the part of the Holder in exercising any right
         hereunder shall so operate.

                  15.3. Communications. All communications provided for herein
         shall be sent, except as maybe otherwise specifically provided, by
         registered or certified mail, return receipt requested: if to the
         Holder of this Warrant, to the address shown on the books of the
         Company and if to the Company, to 11494 Luna Road, Suite 100, Farmers
         Branch, Texas 75234, attention of the President, or to such other
         address as the Company may advise the Holder of this Warrant in
         writing.

                  15.4. Headings. The headings of the Sections of this Warrant
         are inserted for convenience only and shall not be deemed to constitute
         a part of this Warrant.


WARRANT TO PURCHASE COMMON STOCK - PAGE 8
<PAGE>



         IN WITNESS WHEREOF, MIGRATEC, INC. has caused this Warrant to be
executed in its corporate name by the undersigned, and its seal to be affixed
hereto.

         Dated: March 31, 2002.



                                     MIGRATEC, INC.



                                   By:    /s/ T. Ulrich Brechbuhl
                                          --------------------------------------

                                   Name:  T. Ulrich Brechbuhl
                                          --------------------------------------

                                   Title: President/Chief Financial Officer
                                          --------------------------------------


WARRANT TO PURCHASE COMMON STOCK - PAGE 9
<PAGE>



                                 ASSIGNMENT FORM


         FOR VALUE RECEIVED, the undersigned registered owner of this Warrant
hereby sells, assigns and transfers unto Assignee named below all of the rights
of the undersigned under the within Warrant, with respect to the number of
Common Shares set forth below:

<Table>
<Caption>
                                                                                               Number
                    Name of Assignee                      Assignee's Address                 of Shares
                    ----------------                      ------------------                 ---------
<S>                                                       <C>                                <C>

</Table>



and does hereby irrevocably constitute and appoint as his or her
Attorney-in-fact to make such transfer on the books of the Company
___________________, maintained for the purpose, with full power of substitution
in the premises.

         The undersigned also represents that, by assignment hereof, the
Assignee acknowledges that this Warrant and the shares to be issued upon
exercise hereof or conversion thereof are being acquired for investment and that
the Assignee will not offer, sell or otherwise dispose of this Warrant or any
shares to be issued upon exercise hereof except under circumstances which will
not result in a violation of the Securities Act of 1933, as amended, or any
state securities laws. Further, the Assignee shall, if requested by the Company,
confirm in writing, in a form satisfactory to the Company, that the shares so
purchased are being acquired for investment and not with a view toward
distribution or resale.


Dated:
      --------------------



Signature of Assignee                 Signature of Holder


<PAGE>


                               NOTICE OF EXERCISE


To:      MigraTEC, Inc.

         (1) The undersigned hereby elects to purchase ___________ Common Shares
of MigraTEC, Inc., pursuant to the terms of the attached Warrant, and tenders
herewith payment of the purchase price for such shares in full.

         (2) In exercising this Warrant, the undersigned hereby confirms and
acknowledges that the Common Shares to be issued upon exercise thereof are being
acquired solely for the account of the undersigned and not as a nominee for any
other party, and for investment, and that the undersigned will not offer, sell
or otherwise dispose of any such Common Shares except under circumstances that
will not result in a violation of the Securities Act of 1933, as amended, or any
state securities laws.

         (3) Please issue a certificate or certificates representing said shares
of Common Shares in the name of the undersigned or in such other name as is
specified below:



Name


         (4) Please issue a new Warrant for the unexercised portion of the
attached Warrant in the name of the undersigned or in such other name as is
specified below:



Name

                                     -------------------------------------------
Date                                 Signature
    ------------------------



<PAGE>


THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY
NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF A
REGISTRATION STATEMENT IN EFFECT WITH RESPECT TO THE SECURITIES UNDER SUCH ACT
OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS
NOT REQUIRED. THIS WARRANT IS FURTHER SUBJECT TO THE RESTRICTIONS ON
TRANSFERABILITY SET FORTH IN SECTION 7(c) HEREOF.

                                                                    May 14, 2002

                        WARRANT TO PURCHASE COMMON STOCK
                                       of
                                 MIGRATEC, INC.
             Void after May 13, 2005, subject to Section 3(a) hereof

         This certifies that, for value received, Richard A. Gray, Jr., or
registered assigns ("Holder"), is entitled, subject to the terms set forth
below, to purchase from MigraTEC, Inc., a Delaware corporation (the "Company"),
a total of 124,550 fully paid and nonassessable shares of Common Stock, par
value $.001 per share, of the Company ("Common Shares"), as constituted on the
date hereof (the "Warrant Issue Date"), upon surrender hereof, at the principal
office of the Company referred to below, with the subscription form attached
hereto duly executed, and simultaneous payment therefore in lawful money of the
United States or otherwise as hereinafter provided, at the Exercise Price as set
forth in Section 2 hereof. The number, character and Exercise Price of such
Common Shares are subject to adjustment as provided below. The term "Warrant" as
used herein shall include this Warrant and any warrants delivered in
substitution or exchange therefore as provided herein.

         1. Term of Warrant. Subject to the terms and conditions set forth
herein, this Warrant shall be exercisable during the term commencing on the
first anniversary of the Warrant Issue Date and ending at 5:00 p.m., Central
Standard Time, on the third anniversary of the Warrant Issue Date, and shall be
void thereafter.

         2. Exercise Price. The exercise price (the "Exercise Price") at which
this Warrant may be exercised shall be $0.25 per Common Share, as adjusted from
time to time pursuant to Section 8 hereof.

         3. Exercise of Warrant.

                  (a) This Warrant shall be exercisable by the Holder, in whole
         or in part, at any time until this Warrant expires as described in
         Section 1 hereof, by the surrender of this Warrant and the Notice of
         Exercise annexed hereto duly completed and executed on behalf of the
         Holder, at the office of the Company (or such other office or agency of
         the Company as it may designate by notice in writing to the Holder at
         the address of the Holder appearing on the books of the Company), upon
         payment (i) in cash or by check acceptable to the Company, (ii) by
         cancellation


WARRANT TO PURCHASE COMMON STOCK - PAGE 1
<PAGE>


         by the Holder of indebtedness of the Company to the Holder, or (iii) by
         a combination of (i) and (ii), of the purchase price of the Common
         Shares to be purchased.

                  (b) This Warrant shall be deemed to have been exercised
         immediately prior to the close of business on the date of its surrender
         for exercise as provided in Section 3(a) hereof, and the person
         entitled to receive the Common Shares issuable upon such exercise shall
         be treated for all purposes as the holder of record of such shares as
         of the close of business on such date. As promptly as practicable on or
         after such date and in any event within ten (10) days thereafter, the
         Company at its expense shall issue and deliver to the person or persons
         entitled to receive the same a certificate or certificates for the
         number of shares issuable upon such exercise.

                  (c) If the Warrant has been exercised in part, the Company
         will, at the time of delivery of such certificate or certificates,
         deliver to the Holder a new Warrant evidencing the rights of the Holder
         to purchase a number of Common Shares with respect to which the Warrant
         has not been exercised, which new Warrant will, in all other respects,
         be identical with this Warrant, or, at the request of the Holder,
         appropriate notation may be made on this Warrant and this Warrant
         returned to the Holder.

         4. No Fractional Shares or Scrip. No fractional shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant. In lieu of any fractional share to which the Holder would otherwise be
entitled, the Company shall make a cash payment equal to the Exercise Price
multiplied by such fraction.

         5. Replacement of Warrant. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and, in the case of loss, theft or destruction, on delivery of an
indemnity agreement reasonably satisfactory in form and substance to the Company
or, in the case of mutilation, on surrender and cancellation of this Warrant,
the Company at its expense shall execute and deliver, in lieu of this Warrant, a
new warrant of like tenor and amount.

         6. Rights of Shareholders. Subject to Sections 8 and 10 hereof, the
Holder shall not be entitled to vote or receive dividends or be deemed the
holder of Common Shares or any other securities of the Company that may at any
time be issuable on the exercise hereof for any purpose, nor shall anything
contained herein be construed to confer upon the Holder, as such, any of the
rights of a member of the Company or any right to vote upon any matter submitted
to members at any meeting thereof, or to give or withhold consent to any
corporate action (whether upon any recapitalization, issuance of stock
reclassification of stock, change of par value, or change of stock to no par
value, consolidation, merger, conveyance or otherwise) or to receive notice of
meetings, or to receive dividends or subscription rights or otherwise until the
Warrant shall have been exercised as provided herein.

         7. Transfer of Warrant.

         (a) Warrant Register. The Company will maintain a register (the
"Warrant Register") containing the names and addresses of the Holder or Holders.
Any Holder of this Warrant or any portion thereof may


WARRANT TO PURCHASE COMMON STOCK - PAGE 2
<PAGE>


change his address as shown on the Warrant Register by written notice to the
Company requesting such change. Any notice or written communication required or
permitted to be given to the Holder may be delivered or given by mail to such
Holder as shown on the Warrant Register and at the address shown on the Warrant
Register. Until this Warrant is transferred on the Warrant Register of the
Company, the Company may treat the Holder as shown on the Warrant Register as
the absolute owner of this Warrant for all purposes, notwithstanding any notice
to the contrary.

         (b) Warrant Agent. The Company may, by written notice to the Holder,
appoint an agent for the purpose of maintaining the Warrant Register referred to
in Section 7(a) hereof, issuing the Common Shares or other securities then
issuable upon the exercise of this Warrant, exchanging this Warrant, replacing
this Warrant, or any or all of the foregoing. Thereafter, any such registration,
issuance, exchange, or replacement, as the case may be, shall be made at the
office of such agent.

         (c) Transferability of Warrant and Shares Issued on Exercise. This
Warrant and the Common Shares or any other securities of the Company that may at
any time be issued on the exercise of this Warrant may not be transferred or
assigned without compliance with all applicable federal and state securities
laws by the transferor and the transferee (including the delivery of investment
representation letters and legal opinions reasonably satisfactory to the
Company, if such are requested by the Company). Subject to the provisions of
this Warrant with respect to compliance with the Securities Act of 1933, as
amended (the "Act"), and applicable state securities laws, this Warrant and the
Common Shares or any other securities of the Company that may at any time be
issued on the exercise of this Warrant may be transferred by endorsement (by the
Holder executing the Assignment Form annexed hereto) and delivery of the same.

         (d) Exchange of Warrant Upon a Transfer. On surrender of this Warrant
for exchange, properly endorsed on the Assignment Form and subject to the
provisions of this Warrant with respect to compliance with the Act and with the
limitations on assignments and transfers and contained in this Section 7, the
Company at its expense shall issue to, or on the order of, the Holder a new
warrant or warrants of like tenor, in the name of the Holder, or as the Holder
(on payment by the Holder of any applicable transfer taxes) may direct, for the
number of shares issuable upon exercise hereof.

         (e) Compliance with Securities Laws and Legends.

                  (i) The Holder of this Warrant, by acceptance hereof,
         acknowledges that this Warrant and the Common Shares or any other
         securities of the Company that may at any time be issued upon exercise
         hereof are being acquired solely for the Holder's own account and not
         as a nominee for any other party, and for investment, and that the
         Holder will not offer, sell or otherwise dispose of this Warrant or any
         Common Shares or any other securities of the Company that may at any
         time be issued upon exercise hereof except under circumstances that
         will not result in a violation of the Act or any state securities laws.
         Upon exercise of this Warrant, the Holder shall, if requested by the
         Company, confirm in writing, in a form satisfactory to the Company,
         that the Common Shares or other securities so purchased are being
         acquired solely for the Holder's own account and not as a nominee for
         any other party, for investment, and not with a view toward
         distribution or resale.


WARRANT TO PURCHASE COMMON STOCK - PAGE 3
<PAGE>


                  (ii) All Common Shares or any other securities of the Company
         that may at any time be issued upon exercise hereof or conversion
         thereof shall be stamped or imprinted with a legend in substantially
         the following form (in addition to any legend required by state
         securities laws):

                  THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO CERTAIN
                  RESTRICTIONS ON TRANSFER AND HAVE BEEN ACQUIRED FOR INVESTMENT
                  AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
                  AS AMENDED, OR ANY APPLICABLE STATE SECURITIES LAWS, AND MAY
                  NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED UNLESS AND UNTIL
                  SUCH SECURITIES ARE REGISTERED UNDER SUCH ACT, OR SUCH STATE
                  LAWS, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY IS
                  OBTAINED TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED.
                  COPIES OF THE AGREEMENT COVERING THE PURCHASE OF THESE
                  SECURITIES AND RESTRICTING THEIR TRANSFER OR SALE MAY BE
                  OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER OF
                  RECORD HEREOF TO THE SECRETARY OF THE COMPANY AT THE PRINCIPAL
                  EXECUTIVE OFFICES OF THE COMPANY.

         8. Adjustments. The Exercise Price and the number of shares purchasable
hereunder are subject to adjustment from time to time as follows

                  8.1. Merger, Sale of Assets, etc. If at any time while this
         Warrant is outstanding and unexpired there shall be (i) a
         reorganization (other than a combination, reclassification, exchange or
         subdivision of shares otherwise provided for herein), (ii) a merger or
         consolidation of the Company with or into another corporation in which
         the Company is not the surviving entity, or a reverse triangular merger
         in which the Company is the surviving entity but the shares of the
         Company's capital stock outstanding immediately prior to the merger are
         converted by virtue of the merger into other property, whether in the
         form of securities, cash, or otherwise, or (iii) a sale or transfer of
         the Company's properties and assets as, or substantially as, an entity
         to any other person, then, prior to such reorganization, merger,
         consolidation, sale or transfer, the holder of this Warrant may
         exercise this Warrant, during the period specified herein and upon
         payment of the Exercise Price then in effect, and in the event that any
         of the purchase rights represented by this Warrant have not yet vested
         in accordance with Section 3(a) hereof prior to such reorganization,
         merger, consolidation, sale or transfer, at the option of the new
         entity created by such reorganization, merger or consolidation or the
         purchaser or transferee in such sale or transfer, (A) the purchase
         rights represented by this Warrant shall vest effective immediately
         prior to the effective date of such reorganization, merger,
         consolidation, sale or transfer or (B) such new entity, purchaser or
         transferee shall issue a new warrant to purchase shares of such entity
         on similar terms as contained in this Warrant effective as of the
         closing of such reorganization, merger, consolidation, sale or
         transfer.


WARRANT TO PURCHASE COMMON STOCK - PAGE 4
<PAGE>


                  8.2. Reclassification. If the Company, at any time while this
         Warrant remains outstanding and unexpired, by reclassification of
         securities or otherwise, shall change any of the securities as to which
         purchase rights under this Warrant exist into the same or different
         number of securities of any class or classes, this Warrant shall
         thereafter represent the right to acquire such number and kind of
         securities as would have been issuable as the result of such change
         with respect to the securities that were subject to the purchase rights
         under this Warrant immediately prior to such reclassification or other
         change and the Exercise Price therefor shall be appropriately adjusted,
         all subject to further adjustment as provided in this Section 8.

                  8.3. Split, Subdivision or Combination of Shares. If the
         Company at any time while this Warrant remains outstanding and
         unexpired shall split, subdivide or combine the securities as to which
         purchase rights under this Warrant exist, into a different number of
         securities of the same class, the number of Common Shares issuable upon
         exercise of this Warrant shall be proportionately increased in the case
         of a split or subdivision or proportionately decreased in the case of a
         combination and the Exercise Price for such securities shall be
         proportionately decreased in the case of a split or subdivision or
         proportionately increased in the case of a combination.

                  8.4. Adjustments for Dividends in Other Securities or
         Property. If while this Warrant remains outstanding and unexpired the
         holders of the securities as to which purchase rights under this
         Warrant exist at the time shall have received, or, on or after the
         record date fixed for the determination of eligible members, shall have
         been entitled to receive, without payment therefor, other or additional
         securities or property (other than cash) of the Company by way of
         dividend, then and in each case, this Warrant shall represent the right
         to acquire, in addition to the number of shares of the security
         receivable upon exercise of this Warrant, and without payment of any
         additional consideration therefor, the amount of such other or
         additional consideration therefor, the amount of such other or
         additional securities or property (other than cash) of the Company that
         such holder would hold on the date of such exercise had it been the
         holder of record of the security receivable upon exercise of this
         Warrant on the date hereof and had thereafter, during the period from
         the date hereof to and including the date of such exercise, retained
         such shares and/or all other securities available by it as aforesaid
         during such period, giving effect to all adjustments called for during
         such period by the provisions of this Section 8.

                  8.5. Certificate as to Adjustments. Upon the occurrence of
         each adjustment or readjustment pursuant to this Section 8, the Company
         at its expense shall promptly compute such adjustment or readjustment
         in accordance with the terms hereof and furnish to each Holder of this
         Warrant a certificate setting forth such adjustment or readjustment and
         showing in detail the facts upon which such adjustment or readjustment
         is based. The Company shall, upon the written request, at any time, of
         any such Holder, furnish or cause to be furnished to such Holder a like
         certificate setting forth: (i) such adjustments and readjustments; (ii)
         the Exercise Price at the time in effect; and (iii) the number of
         Common Shares and the amount, if any, of other property that at the
         time would be received upon the exercise of the Warrant.


WARRANT TO PURCHASE COMMON STOCK - PAGE 5
<PAGE>


                  8.6. No Impairment. The Company will not, by any voluntary
         action, avoid or seek to avoid the observance or performance of any of
         the terms to be observed or performed hereunder by the Company, but
         will at all times in good faith assist in the carrying out of all the
         provisions of this Section 8 and in the taking of all such action as
         may be necessary or appropriate in order to protect the rights of the
         Holders of this Warrant against impairment.

         9. Reservation of Stock. The Company covenants that during the term
this Warrant is exercisable, the Company will reserve from its authorized and
unissued Common Shares a sufficient number of shares to provide for the issuance
of Common Shares upon the exercise of this Warrant. The Company further
covenants that all shares that may be issued upon the exercise of rights
represented by this Warrant, upon exercise of the rights represented by this
Warrant and payment of the Exercise Price, all as set forth herein, will be free
from all taxes, liens and charges in respect of the issue thereof (other than
taxes in respect of any transfer occurring contemporaneously or otherwise
specified herein). The Company agrees that its issuance of this Warrant shall
constitute full authority to its officers who are charged with the duty of
executing certificates representing Common Shares to execute and issue the
necessary certificates for Common Shares upon the exercise of this Warrant.

         10. Notices.

                  (a) Whenever the Exercise Price or number of shares
         purchasable hereunder shall be adjusted pursuant to Section 8 hereof,
         the Company shall issue a certificate signed by its President and Chief
         Financial Officer or any manager setting forth, in reasonable detail,
         the event requiring the adjustment, the amount of the adjustment, the
         method by which such adjustment was calculated, and the Exercise Price
         and number of shares purchasable hereunder after giving effect to such
         adjustment, and shall cause a copy of such certificate to be mailed (by
         certified or registered mail, return receipt requested) to the Holder
         of this Warrant.

                  (b) In case:

                           (i) the Company shall take a record of the holders of
                  its Common Shares (or other stock or securities at the time
                  receivable upon the exercise of this Warrant) for the purpose
                  of entitling them to receive any dividend or other
                  distribution, or any right to subscribe for or purchase any
                  shares of stock of any class or any other securities, or to
                  receive any other right; or

                           (ii) of any capital reorganization of the Company,
                  any reclassification of the securities of the Company, any
                  public offering of Common Shares, any consolidation or merger
                  of the Company with or into another corporation, or any
                  conveyance of all or substantially all of the assets of the
                  Company to another corporation; or

                           (iii) of any voluntary dissolution, liquidation or
                  winding-up of the Company;



WARRANT TO PURCHASE COMMON STOCK - PAGE 6
<PAGE>
                  then, and in each such case, the Company will mail or cause to
                  be mailed, registered or certified mail, return receipt
                  requested, to the Holder or Holders a notice specifying, as
                  the case may be, (A) the date on which a record is to be taken
                  for the purpose of such dividend, distribution or right, and
                  stating the amount and character of such dividend,
                  distribution or right, or (B) the date on which such
                  reorganization, reclassification, public offering,
                  consolidation, merger, conveyance, dissolution, liquidation or
                  winding-up is to take place, and the time, if any is to be
                  fixed, as of which the holders of record of Common Shares (or
                  such securities at the time receivable upon the exercise of
                  this Warrant) shall be entitled to exchange their Common
                  Shares (or such other securities) for securities or other
                  property deliverable prior to or upon such reorganization,
                  reclassification, offering, consolidation, merger, conveyance,
                  dissolution, liquidation or winding-up. Such notice shall be
                  mailed at least 45 days prior to the date therein specified.
                  The Holder of this Warrant shall notify the Company of its
                  election to exercise this Warrant within 20 days after the
                  date of the Company's notice.

                  (c) All such notices, advice and communications shall be
         deemed to have been received on the date of receipt by the person to
         whom it is addressed.

         11. Indemnification. The Holder agrees to indemnify, to the extent
permitted by law, the Company and its officers and directors against all losses,
claims, damages, liabilities, expenses and obligations which arise out of or are
based on an assertion that the Company must provide compensation to any entity
affiliated with Holder or which is party to a contract with Holder (other than
the Company) as a result of the Company's issuance of this Warrant to Holder;
provided that, the Holder's duty to indemnify shall be limited to and shall not
exceed the Holder assigning the Holder's right in and to this Warrant and to any
Common Shares purchased upon the exercise of all or part of this Warrant to the
Company or such other indemnitees.

         12. Registration Rights. Upon exercise of this Warrant, the Holder
shall have and be entitled to exercise "piggy-back" registration rights in
connection with certain registrations effected by the Company.

         13. Amendments.

                  (a) Any term of this Warrant may be amended with the written
         consent of the Company and the holders of the Warrants representing not
         less than a majority of the Common Shares issuable upon exercise of any
         and all outstanding Warrants. Any amendment effected in accordance with
         this Section 13 shall be binding upon each holder of any of the
         Warrants, each future Holder of all such Warrants, and the Company;
         provided, however, that no special consideration or inducement may be
         given to any such Holder in connection with such consent that is not
         given ratably to all such holders, and that such amendment must apply
         to all such Holders equally and ratably in accordance with the number
         of Common Shares issuable upon exercise of their Warrants. The Company
         shall promptly give notice to all Holders of Warrants of any amendment
         effected in accordance with this Section 13.


WARRANT TO PURCHASE COMMON STOCK - PAGE 7
<PAGE>


                  (b) No waivers of, or exceptions to, any term, condition or
         provision of this Warrant, in any one or more instances, shall be
         deemed to be, or construed as, a further or continuing waiver of any
         such term, condition or provision.

         14. Authority. This Warrant has been duly authorized and executed by
the Company and constitutes the valid and binding obligation of the Company.

         15. Miscellaneous.

                  15.1. Successors and Assigns. All the covenants and agreements
         made by the Company in this Warrant shall bind its successors and
         assigns.

                  15.2. No Waiver. No course of dealing between the Company and
         the Holder hereof shall operate as a waiver of any right of any holder
         hereof, and no delay on the part of the Holder in exercising any right
         hereunder shall so operate.

                  15.3. Communications. All communications provided for herein
         shall be sent, except as maybe otherwise specifically provided, by
         registered or certified mail, return receipt requested: if to the
         Holder of this Warrant, to the address shown on the books of the
         Company and if to the Company, to 11494 Luna Road, Suite 100, Farmers
         Branch, Texas 75234, attention of the President, or to such other
         address as the Company may advise the Holder of this Warrant in
         writing.

                  15.4. Headings. The headings of the Sections of this Warrant
         are inserted for convenience only and shall not be deemed to constitute
         a part of this Warrant.


WARRANT TO PURCHASE COMMON STOCK - PAGE 8
<PAGE>


         IN WITNESS WHEREOF, MIGRATEC, INC. has caused this Warrant to be
executed in its corporate name by the undersigned, and its seal to be affixed
hereto.

         Dated: May 14, 2002.



                                    MIGRATEC, INC.



                                   By:       /s/ T. Ulrich Brechbuhl
                                          --------------------------------------

                                   Name:  T. Ulrich Brechbuhl
                                          --------------------------------------

                                   Title: President/Chief Financial Officer
                                          --------------------------------------



WARRANT TO PURCHASE COMMON STOCK - PAGE 9
<PAGE>


                                 ASSIGNMENT FORM


         FOR VALUE RECEIVED, the undersigned registered owner of this Warrant
hereby sells, assigns and transfers unto Assignee named below all of the rights
of the undersigned under the within Warrant, with respect to the number of
Common Shares set forth below:

<Table>
<Caption>

                                                                                               Number
                    Name of Assignee                      Assignee's Address                 of Shares
                    ----------------                      ------------------                 ---------
<S>                                                       <C>                                <C>

</Table>


and does hereby irrevocably constitute and appoint as his or her
Attorney-in-fact to make such transfer on the books of the Company
___________________, maintained for the purpose, with full power of substitution
in the premises.

         The undersigned also represents that, by assignment hereof, the
Assignee acknowledges that this Warrant and the shares to be issued upon
exercise hereof or conversion thereof are being acquired for investment and that
the Assignee will not offer, sell or otherwise dispose of this Warrant or any
shares to be issued upon exercise hereof except under circumstances which will
not result in a violation of the Securities Act of 1933, as amended, or any
state securities laws. Further, the Assignee shall, if requested by the Company,
confirm in writing, in a form satisfactory to the Company, that the shares so
purchased are being acquired for investment and not with a view toward
distribution or resale.


Dated:
      ------------------------------




Signature of Assignee                  Signature of Holder


<PAGE>
                               NOTICE OF EXERCISE


To:      MigraTEC, Inc.

         (1) The undersigned hereby elects to purchase ___________ Common Shares
of MigraTEC, Inc., pursuant to the terms of the attached Warrant, and tenders
herewith payment of the purchase price for such shares in full.

         (2) In exercising this Warrant, the undersigned hereby confirms and
acknowledges that the Common Shares to be issued upon exercise thereof are being
acquired solely for the account of the undersigned and not as a nominee for any
other party, and for investment, and that the undersigned will not offer, sell
or otherwise dispose of any such Common Shares except under circumstances that
will not result in a violation of the Securities Act of 1933, as amended, or any
state securities laws.

         (3) Please issue a certificate or certificates representing said shares
of Common Shares in the name of the undersigned or in such other name as is
specified below:



Name


         (4) Please issue a new Warrant for the unexercised portion of the
attached Warrant in the name of the undersigned or in such other name as is
specified below:



Name

                                     -------------------------------------------
Date                                 Signature
    ------------------------