Document:

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                                                                     EXHIBIT 4.1

                             [FRONT OF CERTIFICATE]

   NUMBER                      VIEWLOCITY, INC.                    SHARES
VI              INCORPORATED UNDER THE LAWS OF THE STATE OF GEORGIA

COMMON STOCK                                 SEE REVERSE FOR CERTAIN DEFINITIONS
$0.01 PAR VALUE                                         CUSIP 926720 10 3

THIS CERTIFIES THAT [SPECIMEN] IS THE OWNER OF _________________________________
           FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK OF
                                VIEWLOCITY, INC.
transferable on the books of the Corporation in person or by duly authorized
attorney, upon the surrender of this certificate properly endorsed. This
certificate is not valid unless countersigned by the Transfer Agent and
registered by the Registrar.

  Witness the facsimile signatures of its duly authorized officers and
facsimile of its corporate seal.

Dated:

---------------------------           [SEAL]             -----------------------
Secretary                                                Chief Executive Officer

COUNTERSIGNED AND REGISTERED:

SUNTRUST BANK, ATLANTA
TRANSFER AGENT AND REGISTRAR

BY
   ----------------------------
       AUTHORIZED SIGNATURE

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                              [BACK OF CERTIFICATE]

                                VIEWLOCITY, INC.

     The Corporation will furnish without charge to each shareholder who so
requests a statement or summary or summary of the powers, designations,
preferences and relative, participating, optional or other special rights of
each class of stock or series thereof which the Corporation is authorized to
issue and of the qualifications, limitations or restrictions of such preferences
and/or rights. Such request may be made to the office of the Secretary of the
Corporation or the Transfer Agent named on the face of this Certificate.

     The following abbreviations, when used in the inscription on the face of
this Certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

 TEN COM           -  as tenants in common
 TEN ENT           -  as tenants by the entireties
 JT TEN            -  as joint  tenants  with the right of
                      survivorship and not as tenants in
                      common
 UNIF GIFT MIN ACT -  ____________ CUSTODIAN ____________
                      (Cust)                      (Minor)
                      under  the  Uniform  Gifts to
                      Minors Act ________________
                                    (State)

     Additional abbreviations may also be used though not in the above list.

 FOR VALUE RECEIVED, _________________________________ HEREBY SELL, ASSIGN AND
TRANSFER UNTO

PLEASE INSERT SOCIAL SECURITY OR
OTHER IDENTIFYING NUMBER OF ASSIGNEE

____________________________________

________________________________________________________________________________
     PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS OF ASSIGNEE
________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________SHARES
OF THE COMMON STOCK REPRESENTED BY THE WITHIN CERTIFICATE, AND DO HEREBY
IRREVOCABLY CONSTITUTE AND APPOINT
_______________________________________________________________________ATTORNEY
TO TRANSFER THE SAID STOCK ON THE BOOKS OF THE WITHIN NAMED CORPORATION
WITH THE FULL POWER OF SUBSTITUTION IN THE PREMISES.

DATED _______________
                            __________________________________________________
                     NOTICE:THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND
                            WITH THE NAME AS  WRITTEN  UPON THE FACE OF THE
                            CERTIFICATE IN EVERY PARTICULAR,  WITHOUT
                            ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.

    SIGNATURE(S) GUARANTEED:__________________________________________________
                            THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
                            GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS
                            AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
                            MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
                            MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.

    KEEP THIS CERTIFICATE IN A SAFE PLACE, IF IT IS LOST, STOLEN MUTILATED OR
    DESTROYED, THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION
    TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE.

                                       -2-<Page>

                                                                   EXHIBIT 10.18

                                VIEWLOCITY, INC.
                               3475 PIEDMONT ROAD
                                   SUITE 1700
                                ATLANTA, GA 30305

May 25, 2001

Mr. Jeff Simpson
5096 Long Island Drive NW
Atlanta, GA 30327

Dear Jeff:

On behalf of the Board of Directors of Viewlocity, Inc. (hereinafter
"Viewlocity" or "the Company"}, we are pleased to offer you the position of
Chief Executive Office and Chairman of the Board of Directors of Viewlocity,
Inc. (hereinafter "the Board") subject to a vote on your election to be taken no
later than Friday, June 1st. In making this offer, we are expressing our
enthusiastic support for your leadership skills and abilities. You bring a skill
set to this Company that is essential to achieving our goals, both short and
long term. In addition, we expect that your base of experiences and contacts
will enable you to significantly impact and influence the strategic direction of
the organization. The purpose of this letter is to detail the terms of your
employment.

   -   JOB TITLE:      Chief Executive Officer (hereinafter "CEO")

   -   STARTING DATE:  As soon as possible, but no later than Monday, July 2,
                       2001.

   -   SALARY:         $300,000.00 per year (hereinafter referred to as your
                       "base compensation").

   -   BONUS:          In addition to your base compensation, you will be
       eligible for an annual bonus of up to $150,000.00 per year in accordance
       with the terms and conditions set by the Board each year. The amount of
       the annual bonus will be determined based upon achievement of performance
       goals established by the Board in its sole discretion. The first year's
       bonus will be guaranteed and will be paid in equal monthly installments
       for the first twelve months.

   -   STOCK: You will be given the opportunity to purchase shares of the
       Company's stock equal to 6% of the Company's fully diluted shares
       outstanding, post-Series "F" Financing, in the form of stock options or
       restricted stock available for purchase. In the event of a sale of the
       Company or an IPO resulting in an enterprise valuation greater than
       $250,000,000.00, you will be eligible to be granted an additional option
       for 1% of the

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Mr. Jeff Simpson                                                     May 25,2001
                                                                          Page 2

       Company's fully diluted shares outstanding, post-Series "F" Financing, in
       accordance with the terms to be determined by the Board of Directors.

   -   In the event that (i) a "Change of Control" (as defined herein) occurs,
       your vesting schedule would accelerate by 24 months and (ii) should you
       be required to relocate, take a position of unequal stature or be
       terminated without cause as a result of this change of control, 100% of
       any remaining options would immediately be vested.

   -   For the purpose of this letter, "Change in Control" shall mean the
       occurrence of the following event: the stockholders of the Company
       approve a merger or consolidation of the Company with any other
       corporation, other than a merger or consolidation which would result in
       the voting securities of the Company outstanding immediately prior
       thereto continuing to represent (either by remaining outstanding or by
       being converted into voting securities of the surviving entity) at least
       50% of the total voting power represented by the voting securities of
       the Company or such surviving entity outstanding immediately after such
       merger or consolidation, or the stockholders of the Company approve a
       plan of complete liquidation of the Company or an agreement for the sale
       or disposition by the Company of all or substantially all the Company's
       assets. In addition, for the purpose of this letter, "Change of Control"
       shall also mean the consummation of the acquisition by any single person
       (as such term is defined in section 13(d) or 14(d) of the Securities
       Exchange Act of 1934, as amended) of beneficial ownership of fifty-one
       percent (51%) or more of the combined voting power of the then
       outstanding voting securities of the Company.

   -   RELOCATION AND TRANSITION ALLOWANCE: The Company will reimburse you for
       reasonable moving expenses either connected to a move from Dallas, TX to
       Atlanta, GA or connected to a move from Atlanta, GA to Dallas, TX. You
       will be eligible for reimbursement upon the Company's receipt of proper
       documentation of moving related expenses up to $50,000 if you and the
       Board make the determination that you should reside in Atlanta, GA. If
       you and the Board make the determination that you should reside in
       Dallas, TX, you will be eligible for reimbursement upon the Company's
       receipt of proper documentation of moving related expenses up to
       $150,000. The determination of whether an expense is moving related will
       be at the discretion of the Board of Directors. In addition, you will be
       eligible for reimbursement upon the Company's receipt of proper
       documentation of transition related expenses. The determination of
       whether an expense is related to the transition period will be at the
       discretion of the Board of Directors.

   -   BENEFITS: You and/or your family will be eligible for the Company's
       benefit plans (i.e. including but not necessarily limited to health and
       dental insurance, 401(k) plan) to the extent that you meet the
       eligibility criteria of those plans. Similarly, you will also be eligible
       for the Company's standard vacation end sick leave policies.

   -   CONFIDENTIAL INFORMATION AND RESTRICTIVE COVENANTS: As an employee of the
       Company, you will have access to confidential information. Moreover, you
       may, during the course of employment, develop certain information or
       inventions that will be the

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Mr. Jeff Simpson                                                     May 25,2001
                                                                          Page 3

       property of the Company. To protect the interests of the Company, we will
       require you to sign, as a condition of your employment, the Company's
       Nondisclosure and Developments Agreement and non-competition agreement.
       The company may also require you to sign an arbitration agreement.

   -   NOT IN VIOLATION OF ANY NON-COMPETITION AGREEMENTS: By acceptance of this
       offer of employment, you are assuring us that your employment with
       Viewlocity would not violate any non-competition, confidentiality or
       other obligations you may have with any current and/or former employer.
       You are also certifying that you have provided us with copies of any
       non-competition, confidentiality or other agreements that you signed in
       conjunction with any current and/or former employment. Viewlocity
       reserves the right to contact your former employers if it has any
       concerns regarding any non-competitive, confidentiality or other
       obligations that you may have. Viewlocity also reserves the right to
       withdraw this offer or terminate your employment if Viewlocity
       determines, in its sole discretion, that your employment with us may
       violate any continuing obligations to a former employer.

   -   EMPLOYMENT AT WILL:    Please note that this letter and your response are
       not meant to constitute a contract of employment for any specific period
       of time and that you will remain, at all times, an employee at-will,
       which means that you will not be obligated to remain at the Company for
       any specific period of time. Likewise, the Company is not obligated to
       employ you for any specific period of time.

   -   TERMINATION WITHOUT CAUSE: in the event the Company terminates your
       employment without "cause", as defined herein, then upon execution of a
       general release of claims satisfactory to the Company, the Company will
       provide you with the following severance benefits: twelve months of
       salary continuation at your then current rate of base compensation and
       twelve months of employer-paid group health benefits on the same basis as
       active employees. Except as may be provided under this Agreement
       following termination of your employment (i) any benefits to which you
       may be entitled pursuant to the Company plans, policies and arrangements
       referred to above shall be determined and paid in accordance with the
       terms of such plans, policies and arrangements, and (ii) you shall have
       no right to receive any other compensation, or to participate in any
       other plan, arrangement or benefit, with respect to future periods after
       such termination. For purposes of this document "Termination without
       Cause" includes the Company decreasing your base compensation to an
       amount less than $300,000 without your approval, and/or changing your
       position from CEO without your consent and approval. In the event
       (i) the Company terminates your employment without "cause", as defined
       herein, then upon execution of a general release of claims satisfactory
       to the Company, or (ii) upon the "Change of Control" as defined herein,
       then you will have I year from such termination or "Change of Control" to
       exercise the vested portion of options or restricted stock.

   -   DEFINITION OF "CAUSE: "Cause" shall mean: (i) the Executive's death or
       his permanent disability, which shall mean the Executive's inability, as
       a result of physical or mental incapacity, substantially to perform his
       duties hereunder for a period of three (3) consecutive months; (ii) a
       material violation by the Executive of any applicable material law or
       regulation respecting the business of the Employer, (iii) the Executive
       being found

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Mr. Jeff Simpson                                                     May 25,2001
                                                                          Page 4

       guilty of felony or an act of dishonesty, which disqualifies the
       Executive from serving as an officer or director of the Employer, or (iv)
       the grossly negligent failure of the Executive to perform his duties
       hereunder in any material respect. The Executive shall be entitled to at
       least ten (10) days' prior written notice of the Employer, intention to
       terminate his employment for "Cause" (as defined herein) (except the
       Executive's death or conviction of a felony) specifying the grounds for
       such termination, and a reasonable opportunity to cure any conduct or
       act, if curable, alleged as grounds for such termination, and a
       reasonable opportunity to present to the Board his position regarding any
       dispute relating to the existence of such cause. In the event termination
       is based upon a claim of physical or mental incapacity, and a dispute
       regarding the Executive's disability arises between the Executive and the
       Employer, each party shall choose a physician who together will choose a
       third physician to make a final determination of whether he was
       substantially unable to perform his duties hereunder for a period of
       three consecutive months as a result of physical or mental incapacity.

   -   OTHER: The terms of this letter may not be changed, modified or
       terminated except by agreement in writing, signed by you and the
       appropriate designee of the Board of Directors. This agreement shall be
       governed, construed and enforced in accordance with the laws of Georgia
       without regard to principles of conflicts of law. Should any provision of
       this agreement, or portion thereof be found invalid and unenforceable, it
       shall be construed to be enforceable to the greatest extent allowable
       under applicable law), and the remaining provisions shall continue in
       force and effect.

   -   TERMS OF OFFER: This offer will remain open until the end of business on
       Friday, May 25, 2001, When you do accept, and all of us sincerely hope
       you will, please sign the enclosed copy of this letter and return it via
       fax to me, with the original to follow.

Jeff, we are excited to have you join us and are enthused at the prospect of
tackling a very promising future together. We look forward to a long and
mutually rewarding relationship.

Sincerely yours,

Scott Tobin
Board Member

Enclosure

Agreed to, accepted and acknowledged:

/s/ Jeff Simpson                                          5.25.01
------------------------                              ----------------------
Jeff Simpson                                          Date

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