Document:

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                                                                    EXHIBIT 10.2

                                ESCROW AGREEMENT

        This Escrow Agreement (herein so called), dated , 2001, made by and
between Mewbourne Development Corporation, a Delaware corporation ("MD"), and
Regions Bank-Tyler ("Escrow Agent");

        WHEREAS, MD will serve as the Managing Partner of Mewbourne Energy
Partners 01-A L.P. and Mewbourne Energy Partners 02-A, L.P (the "Partnerships")
in which general and limited partnership interests (collectively, the
"Interests") are to be offered and sold in an offering pursuant to the
Securities Act of 1933 as amended;

        WHEREAS, the Partnerships will participate with MD and Mewbourne Oil
Company ("MOC"), in a program for the purpose of developing oil and gas
prospects through drilling and producing oil and gas thereon (the "Programs");

        WHEREAS, the Form S-1 Registration Statement (the "Statement") dated
______, 2001 relating to the interests to be sold provides that subscription
proceeds for such Interests ("Subscription Proceeds") from investors who are
initially approved by MD will be deposited in an escrow account with Escrow
Agent and may not be contributed to the capital of a Partnership unless at the
end of the subscription period for the Partnership aggregate Subscription
Proceeds of over $1,000,000 have been received and accepted for such Partnership
and certain other conditions have been met;

        WHEREAS, the Statement relating to the Interests to be sold provides
that investors desiring to purchase Interests in a Partnership shall provide MD
with certain information concerning their suitability for investment in a
Partnership by completing the Subscription Agreement (the "Subscription
Agreement"); and

        WHEREAS, MD desires that Escrow Agent provide procedures for the deposit
and safekeeping of the Subscription Proceeds and delivery of the Subscription
Agreement to MD subject to the terms of this Escrow Agreement;

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

        1. Escrow Period. The term of this Escrow Agreement shall begin on the
effective date of the Statement and shall terminate in accordance with Section 7
below.

        2. Escrow Account and Deposit of Escrow Funds. For the Partnerships,
Escrow Agent shall open a special trust account (the "Account") at Regions
Bank-Tyler for and in the name of Regions Bank-Tyler as Escrow Agent under this
Escrow Agreement. Following receipt by Escrow Agent of the Subscription
Agreement and Subscription Proceeds for the purchase of Interests in a
Partnership, the Subscription Agreement shall be promptly delivered to MD and
the instruments representing the Subscription Proceeds shall be deposited and
maintained by Escrow Agent in accordance with the terms of this Escrow
Agreement. The Subscription Proceeds so deposited, together with any and all
interest earned thereon, are referred to as the "Escrow Funds."

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        3. Duties of Escrow Agent. The Escrow Agent shall have the following
general duties (a) to promptly deliver the Subscription Agreement to MD; (b) to
deposit and safely maintain the Escrow Funds in the Account, guarding at all
times against the commingling thereof with any funds of MD or its affiliates
during the term of this Escrow Agreement; (c) at the direction of MD, to invest
the Escrow Funds in investments that are permissible under rule 15c2-4
promulgated by the Securities and Exchange Commission under the Securities
Exchange Act of 1934, as amended, including, without limitation (if
permissible), time deposits, short-term bank certificates of deposit, short-term
governmental obligations, U.S. treasury bills, bank money market accounts to be
held by Escrow Agent, and similar investments; (d) to prepare and maintain true
and complete records with respect to the Escrow Funds, including the name of
each subscriber and the portion of the Escrow Funds from time to time
attributable to him; and (e) to disburse the Escrow Funds in accordance with the
terms of this Escrow Agreement.

        4. Payment of Escrow Funds. The Escrow Funds, or portions thereof, shall
be paid out by Escrow Agent in accordance with written instructions from MD as
follows: (a) to each subscriber, if any, whose subscription has been rejected by
MD within five business days after the clearance of those Escrow Funds, that
portion of the Escrow Funds attributable to that subscriber as shown on Escrow
Agent's records, including any interest earned thereon; (b) to each subscriber,
if any, whose Subscription Proceeds have not been contributed to a Partnership
prior to the termination of the offering period for Interests in the
Partnership, and any subscriber who may be rejected as an Investor Partner
subsequent to the period described in Subsection (a) of this Section 4, that
portion of the Escrow Funds attributable to the rejected subscriber as shown on
Escrow Agent's records together with any interest attributable thereto (as
calculated by MD); (c) to each subscriber, if any, whose subscription has been
reduced, that portion of the Escrow Funds equal to the amount of such reduction
attributable thereto as shown on Escrow Agent's records; (d) to MD for
distribution to each subscriber within 60 days of closing of a Partnership, that
portion of accrued and unpaid interest on the Escrow Funds relating to that
Partnership, which Escrow Funds were deposited no fewer than five business days
prior to the termination of the offering of Interests in that Partnership,
attributable to that subscriber as shown on Escrow Agent's records; and (e) to
an account for a Partnership all remaining Escrow Funds attributable to that
Partnership. Notwithstanding the foregoing, no portion of the Escrow Funds may
be paid to a Partnership unless the Escrow Agent shall have the excess of
$1,000,000 in Escrow Funds with respect to the Partnership and MD informs the
Escrow Agent in writing that aggregate Subscription Proceeds for Interests in
such Partnership of $1,000,000 or more have been received and cleared from
subscribers that MD initially approves as suitable to be Investor Partners (as
set forth in the Statement) in the Partnership. Notwithstanding the provisions
of this Section 4, or any other provision of this Escrow Agreement, after the
Escrow Agent shall have in excess of $1,000,000 in Escrow Funds with respect to
a Partnership and MD informs the Escrow Agent in writing that aggregate
Subscription Proceeds for Interests in that Partnership of $1,000,000 or more
have been received and cleared by Escrow Agent, upon the written request of MD,
Escrow Agent shall disburse all or any portion of the Escrow Funds to an account
established by MD for the Partnership.

        Notwithstanding anything contained herein to the contrary, it is
expressly contemplated by MD and the Escrow Agent that MD shall be solely
responsible for all computations and disbursements of interest and the
preparation and mailing of all forms with respect thereto, including without
limitation Form 1099 as is contemplated in Subsections (b), (c), and (d) of this
Section 4. The Escrow Agent shall deliver to MD from time to time such records
and information which are

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available to Escrow Agent and are necessary to make the computations of interest
contemplated herein.

        5. Expenses and Compensation. All expenses incurred by Escrow Agent in
connection with this Escrow Agreement and the compensation of Escrow Agent set
forth in Exhibit 1 hereto shall be charged to MD and MD agrees to pay promptly
all such expenses and compensation following receipt of an invoice therefor.

        6. Escrow Agent. MD and Escrow Agent agree that the following provisions
shall control with respect to the rights, duties, liabilities, privileges and
immunities of Escrow Agent: (a) Escrow Agent is not a party to, and is not bound
by, any agreement or other document out of which this Escrow Agreement may rise;
(b) Escrow Agent is not responsible or liable in any manner whatsoever for the
sufficiency, correctness, genuineness, or validity of the subject matter of this
Escrow Agreement; (c) Escrow Agent shall be protected in acting upon any written
notice, request, waiver, consent, certificate, receipt, authorization,
agreement, power of attorney, or other instrument that Escrow Agent in good
faith believes to be genuine and what it purports to be.

        As between MD and the Escrow Agent, MD agrees to indemnify the Escrow
Agent and its officers, directors, employees, agents and attorneys
(collectively, the "Indemnified Parties") against and hold the Indemnified
Parties harmless from any and all losses, costs, damages, expenses, claims, and
attorney's fees suffered or incurred by the Indemnified Parties as a result of,
in connection with or arising from or out of the acts of omissions of any
Indemnified Party in performance of or pursuant to this Escrow Agreement, except
such acts or omissions as may result from such Indemnified Party's willful
misconduct or gross negligence.

        All protections and indemnitees benefitting the Escrow Agent (and any
other Indemnified Party) are cumulative of any other rights it (or they) may
have by law or otherwise, and shall survive the termination of the Escrow
Agreement or the resignation or removal of the Escrow Agent.

        7. Termination. This Escrow Agreement shall terminate upon the first to
occur of any one of the following: December 31, 2001; (a) the full disbursement
of the Escrow Funds with respect to the final Partnership; (b) the written
agreement of termination by MD and Escrow Agent; or (c) the dissolution,
insolvency, or involuntary bankruptcy of MD or an affiliate thereof.

        8. Miscellaneous.

               (a) All notices, demands, requests, and other communications
required or permitted hereunder shall be in writing and shall be deemed to be
delivered when actually received at the address of the addressee set forth below
its name on the signature page of this Escrow Agreement. The rights and
obligations under this Escrow Agreement may not be assigned or delegated by any
party hereto without the prior written consent of the other party hereto. This
Escrow Agreement constitutes the entire agreement and supersedes all other prior
agreements and understandings, whether oral or written, between the parties
hereto with respect to the subject matter hereof;

               (b) The Escrow Agent may consult with and rely on the advice of
counsel satisfactory to it at any time in respect to any question relating to
its duties and responsibilities hereunder or otherwise in connection herewith,
and shall not be liable for any action taken suffered,

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or omitted by the Escrow Agent in good faith upon the advice of such counsel,
and shall be fully protected in doing so, and shall be fully compensated for all
costs and expenses in doing so. The Escrow Agent may act through its officers,
employees, agents and attorneys;

               (c) Any check included in the Escrow Funds shall be collected by
the Escrow Agent and the proceeds held as part of the Escrow Funds. No monies
shall be disbursed by the Escrow Agent until it has collected funds. The Escrow
Agent may pay out monies held in escrow by its check. The Escrow Agent shall not
be obligated to take any legal action to enforce payment of any item deposited
with it in escrow;

               (d) The Escrow Agent shall not be liable for any action that it
may do or refrain from doing in connection herewith, except on account of its
own gross negligence or willful misconduct;

               (e) The Escrow Agent's only duty, liability and responsibility
shall be to deliver the Subscription Agreements to MD and to hold the property
as herein directed and to pay and deliver the same to such persons and under
such conditions as are herein set forth;

               (f) Should any controversy arise between any party with respect
to this agreement, the Escrow Agreement shall have the right to institute a bill
of interpleader in any court of competent jurisdiction to determine the rights
of the parties. Should a bill of interpleader be instituted, or should the
Escrow Agent become involved in litigation in any manner whatsoever on account
of this Agreement or the escrow deposit made hereunder, the obligor, its
successors and assigns shall pay the Escrow Agent reasonable attorneys' fees
incurred by the Escrow Agent and shall indemnify and save the Escrow Agent
harmless from any other disbursements, expenses, losses, costs and damages in
connection with and resulting from such litigation, except such amounts as shall
have been caused by the Escrow Agent's gross negligence or willful misconduct;

               (g) The Escrow Agent shall be obligated to perform only such
duties as are expressly set forth herein, and no implied covenants or
obligations shall be inferred from this Agreement;

               (h) The Escrow Agent, or any successor to it hereafter appointed,
may at any time resign by giving prior written notice in writing to the other
parties hereto and shall be discharged from its duties hereunder upon the
appointment of a successor Escrow Agent as hereinafter provided. In the event of
any such resignation, a successor Escrow Agent shall be appointed by the written
consent of the parties hereto. In the event that the parties hereto fail to
appoint a successor Escrow Agent within 30 days of the Escrow Agent's
resignation, the Escrow Agent shall have the right to petition a court of
competent jurisdiction to appoint a successor Escrow Agent. Any successor Escrow
Agent shall deliver to the parties hereto a written instrument accepting the
appointment hereunder, and thereupon it shall succeed to all the rights and
duties of the Escrow Agent hereunder and shall be entitled to receive all of the
Escrow Funds then held by the predecessor Escrow Agent hereunder;

               (i) THIS ESCROW AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, EXCEPT THAT THE PORTIONS OF THE
TEXAS TRUST CODE, SECTION 111.001, ET SEQ. OF THE PROPERTY CODE, V.A.T.S.
CONCERNING FIDUCIARY DUTIES AND LIABILITIES OF TRUSTEES SHALL NOT APPLY TO THIS
AGREEMENT. THE PARTIES EXPRESSLY

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WAIVE SUCH DUTIES AND LIABILITIES, IT BEING THEIR INTENT TO CREATE SOLELY AN
AGENCY RELATIONSHIP AND HOLD ESCROW AGENT LIABLE ONLY IN THE EVENT OF ITS GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT IN ORDER TO OBTAIN THE LOWER FEE SCHEDULE RATES
AS SPECIFICALLY NEGOTIATED WITH ESCROW AGENT. ANY LITIGATION CONCERNING THE
SUBJECT MATTER OF THIS AGREEMENT SHALL BE EXCLUSIVELY PROSECUTED IN THE COURTS
OF DALLAS COUNTY, TEXAS, AND ALL PARTIES CONSENT TO THE EXCLUSIVE JURISDICTION
AND VENUE OF THOSE COURTS.

        IN WITNESS WHEREOF, the undersigned parties have caused this Escrow
Agreement to be signed and attested to by its duly authorized officers, all as
of the date first written above.

                                       ESCROW AGENT:

                                       REGIONS BANK-TYLER

                                       By:
                                           -------------------------------------
                                       Address: Attn:
                                                     ---------------------------
                                                P.O. Box 2020
                                                Tyler, Texas  75710

                                       Fax No.:      (903) 535-4327

                                       MEWBOURNE DEVELOPMENT CORPORATION

                                       By:
                                           -------------------------------------

                                       Address: 3901 South Broadway
                                                Tyler, Texas  75701

                                       Fax No.: (903) 561-1870

                                       5<PAGE>   1

                                                                   EXHIBIT 10.29

                     MANAGEMENT CHANGE IN CONTROL AGREEMENT

     MANAGEMENT CHANGE IN CONTROL AGREEMENT entered into this 2nd day of
February, 2001, by and among Concord Communications, Inc., a Massachusetts
corporation ("Concord"), and the undersigned employee of Concord, Ellen Kokos
(the "Employee").

                                   WITNESSETH:

     WHEREAS, Concord and the Employee desire to set forth certain terms and
conditions relating to benefits to be afforded to Employee upon the occurrence
of a Change in Control (as hereinafter defined) of Concord;

     NOW THEREFORE, in consideration of the premises and of the mutual covenants
and agreements hereinafter set forth, the parties hereto hereby agree as
follows:

     1.   SEVERANCE AND OPTION ACCELERATION. (a) During the Term (as hereinafter
defined), if within six (6) months of a Change in Control of Concord, Concord
(or any successor corporation) terminates (each, a "Termination Event") the
Employee's employment without Cause (as hereinafter defined) or the Employee
voluntarily terminates her employment for Good Reason (as hereinafter defined),
the Employee shall receive a single severance payment in cash in an amount equal
to six months' base annual salary (at the rate being paid to her immediately
prior to such termination) (the "Severance Benefit"). The Employee shall not be
entitled to continue to receive (i) any other salary or bonus in the event of a
termination for any reason or (ii) any other employee benefits (other than those
specified in the following sentence) in the event of a termination for any
reason. Notwithstanding the foregoing, Concord shall continue to pay Concord's
share of the Employee's health insurance in accordance with Concord's general
policies for a period of six months following any Termination Event.

     (b)  "Good Reason" means the occurrence of one or more of the following
events during the Term and following a Change in Control:

          (i)   Without the Employee's express written consent, Concord shall
     reduce the Employee's duties and responsibilities from those assigned to
     the Employee immediately prior to the Change in Control; or

          (ii)  Without the Employee's express written consent, Concord shall
     require the Employee to have her principal location of work changed to any
     location which is in excess of 60 miles from the location thereof
     immediately prior to the Change in Control; or

          (iii) Without the Employee's express written consent, Concord shall
     materially reduce the Employee's benefits under existing benefit plans,
     unless there is a concurrent reduction uniformly among all persons entitled
     to such benefits.

     (c)  Effective upon the date immediately following any Change in Control of
Concord, the "Full Vest" date(s) set forth in each of the employee's then
outstanding Notice of Option Grant shall be automatically accelerated by
twenty-four (24) months. Notwithstanding the foregoing, if within twenty-four
(24) months after a Change in Control there is a Termination Event, all of the
Employee's unvested options (but only such options as have been granted to the
Employee by Concord as of the date of the Change in Control or such options as
have been exchanged by the Employee for new options in any acquiring company at
the time of a change in Control) shall automatically become fully vested as of
the date of such Termination Event.

     (d)  For purposes of this Agreement, a "Change in Control" shall have
occurred if at any time any of the following events shall occur:

          (A)  Concord is merged, consolidated or reorganized into or with
     another corporation or other legal person, and as a result of such merger,
     consolidation or reorganization less than a majority of the combined voting
     power of the then-outstanding securities of the combined corporation or
     person immediately after such transaction are held in the aggregate by the
     holders of the combined voting power of the then-outstanding securities
     entitled to vote generally in the election of directors of Concord ("Voting
     Stock") immediately prior to such transaction;

<PAGE>   2

          (B)  Concord sells or otherwise transfers all or substantially all of
     its assets to any other corporation or other legal person, and less than a
     majority of the combined voting power of the then-outstanding securities of
     such corporation or person immediately after such sale or transfer is held
     in the aggregate by the holders of the Voting Stock of concord immediately
     prior to such sale or transfer;

          (C)  There is a report filed on Schedule 13D or Schedule 14D-1 (or any
     successor schedule, form or report), each as promulgated pursuant to the
     Exchange Act of 1934 (the "1934 Act"), disclosing that any person (as the
     term "person" is used in Section 13(d)(3) or Section 14(d)(2) of the 1934
     Act) has become the beneficial owner (as the term "beneficial owner" is
     defined under Rule 13d-3 or any successor rule or regulation promulgated
     under the 1934 Act) of securities representing 33% or more of the Voting
     Stock; or

          (D)  Concord files a report or proxy statement with the Securities and
     Exchange Commission pursuant to the 1934 Act disclosing in response to Form
     8-K or Schedule 14A (or any successor schedule, form or report or item
     therein) that a change in control of Concord has or may have occurred or
     will or may occur in the future pursuant to any then-existing contract or
     transaction.

PROVIDED, HOWEVER, that notwithstanding the foregoing provisions of this Section
1, a "Change in Control" shall not be deemed to have occurred for purposes of
this Agreement solely because (i) Concord, (ii) an entity in which Concord
directly or indirectly beneficially owns 50% or more of the voting securities,
(iii) any Concord sponsored employee stock ownership plan or any other employee
benefit plan of Concord, or (iv) any corporation or legal person approved by the
Board of Directors prior to the occurrence of the event that, absent such
approval by the Board of Directors, would have constituted a Change in Control,
either files or becomes obligated to file a report or a proxy statement under or
in response to Schedule 13D, Schedule 14D-1, Form 8-K or Schedule 14A (or any
successor schedule, form or report or item therein) under the 1934 Act,
disclosing beneficial ownership by it of shares of Voting Stock, whether in
excess of 33% or otherwise, or because Concord reports that a change in control
of Concord has or may have occurred or will or may occur in the future by reason
of such beneficial ownership.

          (e)  Notwithstanding anything to the contrary in this Agreement, if
the Employee is a Disqualified Individual (as defined in Section 280G of the
Internal Revenue Code of 1986, as amended (the "Code")) and if any portion of
any acceleration of vesting, payment or transfer of property under this
Agreement would be an Excess Parachute Payment (as defined in Section 280G of
the Code) but for the application of this sentence, then the amount of such
acceleration, payment or transfer otherwise payable to the Employee pursuant to
this Agreement shall be reduced to the minimum extent necessary (but in no event
to less than zero) so that no portion of such payment, as so reduced,
constitutes an Excess Parachute Payment; provided, however, that no reduction
shall be made if the net economic effect would be disadvantageous to the
Employee, taking into account all the facts and circumstances including any tax
savings resulting from the reduction.

     2.   TERMINATION. (a) Concord may, immediately and unilaterally, terminate
the Employee's employment hereunder for "cause" at any time. As used in this
Agreement, the term "cause" shall mean:

          (i)   the Employee's willful and substantial misconduct with respect
     to the business and affairs of Concord, or any subsidiary or affiliate
     thereof;

          (ii)  the Employee's gross neglect of duties, dishonesty, deliberate
     disregard of any material rule or policy of Concord or the commission by
     the Employee of any other action with the intent to injure Concord, or any
     subsidiary or affiliate thereof;

          (iii) the Employee's commission of an act involving embezzlement or
     fraud or commission of a felony; or

          (iv)  the commission of an act which induces any customer of Concord
     to breach a contract or purchase order with Concord, or any subsidiary or
     affiliate thereof.

<PAGE>   3

     In the event of a termination for "cause" as described herein, the Employee
shall not be entitled to severance or other termination benefits, including,
without limitation, the benefits described in Section 1 herein.

     (b)  The Employee's employment shall automatically terminate upon her death
and may be terminated by Concord due to her disability. If the Employee dies or
her employment is terminated due to disability during the Term, then Employee
shall be eligible for such benefits as shall apply to employees of Concord
generally under such circumstances at the time of such termination.

     As used in this Agreement, the term "disability" shall mean the occurrence
of a mental or physical condition which renders the Employee incapable of
performing her duties for a total of six consecutive months.

     (c)  The Employee understands that, prior to any Change in Control, Concord
may terminate the Employee with or without "Cause" at any time. Following any
Change in Control, Concord may also terminate the Employee with or without
"cause" at any time subject to the Employee's rights and Concord's obligations
specified in this Agreement.

     3.   NO OBLIGATION OF EMPLOYMENT. Employee understands that the employment
relationship between Employee and Concord will be "at will" and that Concord may
terminate such relationship with or without cause or for any reason or no
reason.

     4.   NONCOMPETITION AGREEMENT. Employee shall execute concurrently herewith
the form of Noncompetition Agreement attached hereto as EXHIBIT A.

     5.   CONSENT AND WAIVER BY THIRD PARTIES. The Employee hereby represents
and warrants that she has obtained all waivers and/or consents from third
parties which are necessary to enable her to execute and perform this Agreement
without being in conflict with any other agreement, obligation or understanding
with any such third party.

     6.   GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the internal laws of the Commonwealth of Massachusetts and this
Agreement shall be deemed to be performable in Massachusetts.

     7.   SEVERABILITY. In case any one or more of the provisions contained in
this Agreement for any reason shall be held to be invalid, illegal or
unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provision of this Agreement and this Agreement shall
be construed to the maximum extent permitted by law.

     8.   WAIVERS AND MODIFICATIONS. This Agreement may be modified, and the
rights, remedies and obligations contained in any provision hereof may be
waived, only in accordance with this Section 8. No waiver by either party of any
breach by the other or any provision hereof shall be deemed to be a waiver of
any later or other breach thereof or as a waiver of any other provision of this
Agreement. This Agreement sets forth all of the terms of the understandings
between the parties with reference to the subject matter set forth herein and
may not be waived, changed, discharged or terminated orally or by any course of
dealing between the parties, but only by an instrument in writing signed by the
party against whom any waiver, change, discharge or termination is sought.

     9.   ASSIGNMENT. The Employee may not assign any of her rights or delegate
any of her duties or obligations under this Agreement. The rights and
obligations of Concord under this Agreement shall inure to the benefit of, and
shall be binding upon, the successors and assigns of Concord.

     10.  ENTIRE AGREEMENT. This Agreement constitutes the entire understanding
of the parties relating to the subject matter hereof and supersedes and cancels
all agreements, written or oral, made prior to the date hereof between the
Employee and Concord relating to the subject matter hereof; provided, however,
that the Employee's existing option agreements, as modified hereby, shall remain
in effect.

<PAGE>   4

     11.  NOTICES. All notices hereunder shall be in writing and shall be
delivered in person or mailed by certified or registered mail, return receipt
requested, addressed as follows:

     If to Concord, to:       Concord Communications, Inc.
                              600 Nickerson Road
                              Marlboro, MA 01752
                              Attention: John A. Blaeser

                              With a copy to:
                              Kevin M. Barry, Esq.
                              Testa, Hurwitz & Thibeault, LLP
                              High Street Tower
                              125 High Street
                              Boston, MA 02110; and

     If to the Employee, at the Employee's address set forth on the signature
page hereto.

     12.  COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one and the same instrument.

     13.  SECTION HEADINGS. The descriptive section headings herein have been
inserted for convenience only and shall not be deemed to define, limit, or
otherwise affect the construction of any provision hereof.

     14.  TERM. The term of this Agreement (the "Term") shall commence upon the
date hereof and terminate upon the earlier of (i) twenty-four (24) months
following any Change in Control of Concord, (ii) the date prior to any Change in
Control of Concord that the employee for any reason ceases to be an employee of
Concord and (iii) the date following any Change in Control of Concord that the
Employee is terminated for Cause or voluntary terminates his employment (other
than for Good Reason).

<PAGE>   5

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the day
and year first above written.

                                        CONCORD COMMUNICATIONS, INC.

                                        By: /s/ J. A. Blaeser
                                            ------------------------------------
                                            Name: John A. Blaeser
                                            Title: President

                                            EMPLOYEE

                                            /s/ Ellen Kokos
                                            ------------------------------------
                                            Name: Ellen Kokos
                                            Address:

<PAGE>   6

                        EMPLOYEE NONCOMPETITION AGREEMENT

     In consideration and as a condition of my continued employment, I hereby
agree with Concord Communications, Inc. ("Concord") as follows:

     1.   During the period of my employment by Concord (the "Employment
Period"), I will devote my full working time and best efforts to the business of
Concord. Further, (i) for as long as I am an employee of Concord and (ii) for
the period beginning as of the date of the occurrence of a change in Control
through and including the date to occur which is six months following the date
upon which I am no longer an employee of Concord, I agree that I will not,
directly or indirectly, alone or as a partner, officer, director, employee or
stockholder of any entity (except that I may own not more than 1% of the
outstanding shares of any publicly-traded company), engage in any business
activity which is in competition with the products or services being developed,
manufactured or sold by Concord. The provisions of clause (ii) of the preceding
sentence shall (A) apply only if following a Change in Control my employment
with Concord shall have been terminated (1) without cause or for cause pursuant
to Section 2 of my Management Change in Control Agreement of even date herewith
or (2) for "Good Reason" (as that term is defined in my Management Change in
Control Agreement) and (B) not apply if I shall have voluntarily terminated my
employment with Concord. The period following the termination of my employment
during which the restrictions described above shall apply (the "Post-employment
Period") shall be extended by the length of any period of time during the
Post-employment Period during which I am in violation of this paragraph. Nothing
contained herein shall exclude me from participating in civic, charitable,
religious or non-profit activities so long as such activities do not interfere
with the performance of my duties to Concord.

     2.   I agree that any breach of this Agreement by me will cause irreparable
damage to Concord and that in the event of such breach Concord shall have, in
addition to any and all remedies of law, the right to an injunction, specific
performance or other equitable relief to prevent the violation of my obligations
hereunder. I further agree and acknowledge that the post-employment
non-competition provision set forth in Paragraph 1 hereof, and the remedies set
forth in this paragraph, are necessary and reasonable to protect the business of
Concord.

     3.   I understand that this Agreement does not create an obligation on
Concord or any other person or entity to continue my employment.

     4.   No claim of mine against Concord shall serve as a defense against
Concord's enforcement of any provision of this Agreement.

     5.   I hereby represent that I am not a party to, or bound by the terms of,
any agreement with any previous employer, other than Concord, or other party to
refrain from using or disclosing any trade secret or confidential or proprietary
information in the course of my employment with Concord or to refrain from
competing, directly or indirectly, with the business of such previous employer
or any other party, which would prevent me from performing services to or for
Concord in any material way. I further represent that my performance of all the
terms of this Agreement and as an employee of Concord does not and will not
breach any agreement to keep in confidence proprietary information, knowledge or
data acquired by me in confidence or in trust prior to my employment with
Concord, and I will not disclose to Concord or induce Concord to use any
confidential or proprietary information or material belonging to any previous
employer or others. I have not entered into, and I agree I will not enter into,
any agreement, either written or oral, in conflict with the terms of this
Agreement.

     6.   Any waiver by Concord of a breach of any provision of this Agreement
shall not operate or be construed as a waiver of any subsequent breach of such
provision or any other provision hereof.

     7.   I hereby agree that each provision herein shall be treated as a
separate and independent clause, and the unenforceability of any one clause
shall in no way impair the enforceability of any of the other clauses herein.
Moreover, if one or more of the provisions contained in this Agreement shall for
any reason be held to be excessively broad as to scope, activity, subject or
otherwise so as to be unenforceable at law, such provision or provisions shall
be construed by the appropriate judicial body by limiting or reducing it or
them, so as to be enforceable to the maximum extent compatible with the
applicable law as it shall then appear.

     8.   My obligations under this Agreement shall survive the termination of
my employment regardless of the manner of such termination.

<PAGE>   7

     9.   The term "Concord" as used herein shall also include Concord's
subsidiaries, subdivisions or affiliates. Concord shall have the right to assign
this Agreement to its successors and assigns, and all covenants and agreements
hereunder shall inure to the benefit of and be enforceable by said successors or
assigns.

     10.  This Agreement shall be governed by and construed in accordance with
the internal laws of the Commonwealth of Massachusetts. Any claims or legal
actions by one party against the other arising out of the relationship between
the parties contemplated herein (whether or not arising under this Agreement)
shall be governed by the laws of the Commonwealth of Massachusetts and shall be
commenced and maintained in any state or federal court located in Massachusetts,
and both parties hereby submit to the jurisdiction and venue of any such court.

     11.  Capitalized terms used herein and not otherwise defined shall have the
meanings provided in the Management Change in Control Agreement of even date
herewith.

<PAGE>   8

IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the 2nd
day of February, 2001.

                                                  /s/ Ellen Kokos
                                                  ------------------------------
                                                  Name: Ellen Kokos

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