<PAGE>

                                                                   EXHIBIT 10.13

                        EXECUTIVE EMPLOYMENT AGREEMENT
                        ------------------------------

     THIS EMPLOYMENT AGREEMENT (the "Agreement") is made and entered into as of
March 1, 2000 between GRACE DEVELOPMENT, INC., a Colorado corporation (the
"Company"), and SCOTT H. BARBER (the "Executive"), an individual resident of the
State of Georgia.

                             W I T N E S S E T H:
                             - - - - - - - - - -

     WHEREAS, Company wishes to employ Executive as its Chief Technical Officer,
and Executive wishes to serve in such position, on the terms and conditions set
forth herein;

     WHEREAS, Executive desires to be assured of a secure minimum compensation
from Company for his services over a defined term;

     WHEREAS, Company desires to assure the continued services of Executive on
behalf of Company on an objective and impartial basis and without distraction or
conflict of interest in the event of an attempt by any person to obtain control
of Company;

     WHEREAS, the Company recognizes that when faced with a proposal for a
change of control of the Company, Executive may have a significant role in
helping the Company's Executive Committee (the "Committee") assess the options
and advising the Committee on what is in the best interests of the Company and
its stockholders, and it is necessary for Executive to be able to provide this
advice and counsel without being influenced by the uncertainties of his own
situation;

     WHEREAS, Company desires to provide fair and reasonable benefits to
Executive on the terms and subject to the conditions set forth in this
Agreement; and

     WHEREAS, Company desires reasonable protection of its confidential business
and customer information which it has developed at substantial expense and
assurance that Executive will not compete with Company for a reasonable period
of time after termination of his employment with Company, except as otherwise
provided herein.

     NOW, THEREFORE, in consideration of the premises and of the promises and
agreements hereinafter set forth, the parties hereto, intending to be legally
bound, do hereby agree as follows:

     1.   Term.  The term (the "Term") of this Agreement shall begin on the date
          ----
that the Company's committee has approved this Agreement, and  (the "Effective
Date") shall continue in effect for a period of two (2) years from the Effective
Date (the "Initial Term"); provided, however, the Term shall be extended
                           --------  -------
automatically for an additional two-year period (each an "Additional Term") on
each anniversary of the Effective Date unless either party hereto gives written
notice to the other party not to so extend at least ninety (90) days prior
thereto, in which case no further extension shall occur; provided further,
                                                         ----------------
however, that notwithstanding any such notice by the Company not to extend, the
-------
Term shall not expire prior to the expiration of twenty-four (24) months after
the occurrence of a Change in Control (as hereinafter defined).
<PAGE>

     2.   Employment and Duties. The Executive shall serve as the Chief
          ---------------------
Technical Officer of the Company, reporting to senior management of the Company,
and shall have such powers and duties as may from time to time be prescribed by
the committee, provided that such duties are consistent with the Executive's
               --------
position as a senior executive of the Company. The Company shall provide the
Executive with a private office, secretarial and administrative assistance,
office equipment, supplies and other facilities and services suitable to the
Executive's position.

     3.   Salary. For all services to be rendered by the Executive pursuant to
          ------
this Agreement, the Company hereby agrees to pay the Executive a base salary
(the "Base Salary") at an annual rate of $150,000.00 per year during the Initial
Term, payable in accordance with the Company's payroll practices in effect from
time to time, and at a rate set by the compensation committee of the Company's
committee of directors for any Additional Term. Any increase in Base Salary or
other compensation granted by the compensation committee of the Company's
committee of directors shall in no way limit or reduce any other obligation of
the Company hereunder. Once established at an increased specified rate, the term
Base Salary used in this Agreement shall refer to the Base Salary as so
increased.

     4.   Bonus and Special Option Award.
          ------------------------------

     (a)  In addition to his Base Salary, upon completion of the first year of
the Initial Term, Executive shall receive (i) a special bonus equal to no less
than 50% of Base Salary and no more than 100% of Base Salary, payable on the
first anniversary of Executive's employment with the Company; provided the
Executive achieves each of the performance objectives.  Thereafter, in the
discretion of the Company's committee of directors, the Executive may be awarded
for each calendar year during the remainder of the Initial Term and any
subsequent Additional Term, an annual bonus (an "Annual Bonus") either pursuant
to a bonus or incentive plan of the Company or otherwise on terms no less
favorable than those awarded to other executive officers of the Company.

     (b)  The Company agrees to grant to Executive options to purchase 500,000
shares of the common stock, no par value, of the Company at an option exercise
price equal to $1.00 per share (the "Stock Options").  Such options shall be
issued to Executive pursuant to a plan to be adopted by the Company's committee
of directors, and the terms of the grant shall provide, among other things, (i)
that 50% of the Stock Options so granted shall vest and become exercisable on
the first anniversary date of grant and thereafter, 50% shall vest as of the
last day of each succeeding calendar year following the date of grant until all
such options shall be fully vested; and (ii) the Stock Options may be exercised,
once vested, up to ten years following the date of grant.  Executive
acknowledges and agrees that the Stock Options to be granted pursuant hereto are
in lieu of any other stock option or stock incentive plans or programs that may
be granted or extended to other executive officers of the Company during the
Initial Term.

                                       2
<PAGE>

     5.   Benefits. The Executive shall be entitled to all benefits and
          --------
conditions of employment provided by the Company to its executive officers,
including, without limitation, insurance, participation in the Company's
vacation policy, and participation in (except during the Initial terms as
described in Section 4 hereof) any stock option or incentive compensation plans,
pension, profit sharing or other retirement plans, subject (in each case) to the
terms of such plans and any provisions, rules, regulations and laws applicable
to such plans. In exception, Executive will be entitled to a minimum of 4 weeks
vacation annually, nonaccruing.

     6.   Reimbursement for Business Expenses. The Executive shall be reimbursed
          -----------------------------------
for all reasonable out-of-pocket business expenses incurred by him in the direct
performance of his duties during his employment with the Company pursuant to the
terms of this Agreement and in accordance with the Company's policies in effect
from time to time. All requests for reimbursement shall be substantiated by
invoices and other pertinent data reasonably satisfactory to the Company.

     7.   Performance.  The Executive shall devote all of his working time and
          -----------
efforts to the business and affairs of the Company and to the diligent, faithful
and competent performance of the duties and responsibilities assigned to him
pursuant to this Agreement, except for vacations, weekends and holidays.
Notwithstanding the foregoing, the Executive may render charitable, civic and
outside committee services so long as such services do not materially interfere
with the Executive's ability to discharge his duties, including, without
limitation, such outside services as the Executive is currently performing.

     8.   Non-Disclosure of Proprietary Information; Non-Competition; Non-
          ---------------------------------------------------------------
Solicitation.
------------

               8.1.  Confidential Information; Trade Secrets. As used in this
                     ---------------------------------------
          Agreement, the term "Confidential Information" shall mean valuable,
          non-public, competitively sensitive data and information relating to
          the Company's business or the business of any entity affiliated with
          the Company, other than Trade Secrets (as defined below).
          "Confidential Information" shall include, among other things,
          information specifically designated as a Trade Secret that is,
          notwithstanding the designation, determined by a court of competent
          jurisdiction not to be a "trade secret" under applicable law. As used
          in this Agreement, the term "Trade Secrets" shall mean information or
          data of or about the Company or any entity affiliated with the
          Company, including, without limitation, technical or non-technical
          data, formulas, patterns, compilations, programs, devices, methods,
          techniques, drawings, processes, financial data, financial plans,
          product plans, or lists of actual or potential customers or suppliers,
          that (i) derive economic value, actual or potential, from not being
          generally known to, and not being readily ascertainable by proper
          means by, other persons who can obtain economic value from their
          disclosure or use; and (ii) are subject of efforts that are reasonable
          under the circumstances to maintain their secrecy. To the extent that
          the foregoing definition is inconsistent with a definition of "trade
          secret" under

                                       3
<PAGE>

          applicable law, the foregoing definition shall be deemed amended to
          the extent necessary to render it consistent with applicable law.

8.2.  Non-Disclosure.  The Executive will be exposed to Trade Secrets and
      --------------
          Confidential Information as a result of his employment by the Company
          as provided in this Agreement.  The Executive acknowledges and agrees
          that any unauthorized disclosure or use of any of the Trade Secrets or
          Confidential Information of the Company would be wrongful and would
          likely result in immediate and irreparable injury to the Company.  In
          consideration of the Executive's right to employment (or continued
          employment) under the terms of this Agreement, except as appropriate
          in connection with the performance of his obligations under this
          Agreement, the Executive shall not, without the express prior written
          consent of an officer of the Company other than the Executive,
          redistribute, market, publish, disclose or divulge to any other person
          or entity, or use or modify for use, directly or indirectly, in any
          way for any person or entity (i) any Confidential Information during
          the Term of this Agreement and for a period of two (2) years after the
          final date of the Term of this Agreement; and (ii) any Trade Secrets
          at any time (during or after the Term of this Agreement) during which
          such information or data shall continue to constitute a "trade secret"
          under applicable law.  The Executive agrees to cooperate with any
          reasonable confidentiality requirements of the Company.  The Executive
          shall immediately notify the Company of any unauthorized disclosure or
          use of any Trade Secrets or Confidential Information of which the
          Executive becomes aware.

8.3.  Non-Competition.  The Executive shall not, either directly or indirectly,
      ---------------
          alone or in partnership, be connected or concerned with or participate
          in any other competing business or pursuit during any employment by
          the Company, except that the Executive may own up to three percent of
          the outstanding securities of a competing business the securities of
          which are registered with the Securities and Exchange Commission if
          such company is subject to the periodic reporting requirements of the
          Securities Exchange Act of 1934, as amended (the "1934 Act").

8.4.  Non-Solicitation.  For a period of one (1) year immediately following any
      ----------------
          termination of the Executive's employment, the Executive will not
          solicit, or participate in any solicitation of, the customers,
          suppliers, Executives or representatives of the Company (or any of its
          subsidiaries or affiliated companies) to breach any contract with the
          Company, terminate any relationship with the Company or leave the
          Company.  For purposes of this Agreement, customers shall be limited
          to actual customers or actively-sought prospective customers of the
          Company or any subsidiary or affiliate of the Company with whom the
          Executive has had substantial contact during the Term of this
          Agreement.

                                       4
<PAGE>

     9.   Certain Definitions.
          -------------------

               9.1.  Accrued Compensation. For purposes of this Agreement,
                     --------------------
          "Accrued Compensation" shall mean an amount which shall include all
          amounts earned or accrued through the "Termination Date" (as
          hereinafter defined) but not paid as of the Termination Date,
          including, without limitation, (i) Base Salary, (ii) reimbursement for
          reasonable and necessary expenses incurred by the Executive on behalf
          of the Company during the period ending on the Termination Date, (iii)
          vacation pay, (iv) bonuses, including, without limitation, any Annual
          Bonus, and incentive compensation, and (v) all other amounts to which
          the Executive is entitled under any compensation plan of the Company
          at the times such payments are due.

               9.2.  Base Amount. For purposes of this Agreement, "Base Amount"
                     -----------
          shall mean the Executive's annual Base Salary at the highest rate in
          effect on, or at any time during the ninety (90) day period prior to,
          the Termination Date and shall include all amounts of the Executive's
          Base Salary that are deferred under any qualified and non-qualified
          Executive benefit plans of the Company or any other agreement or
          arrangement.

               9.3.  Cause. For purposes of this Agreement, a termination of
                     -----
          employment is for "Cause" if the Executive has been convicted of a
          felony or if the termination is evidenced by a resolution adopted in
          good faith by two-thirds (2/3) of the Company's committee of directors
          that the Executive (i) intentionally and continually failed
          substantially to perform his reasonably assigned duties with the
          Company (other than a failure resulting from the Executive's
          incapacity due to physical or mental illness or from the Executive's
          assignment of duties that would constitute "Good Reason" (as
          hereinafter defined)) which failure continued for a period of at least
          thirty (30) days after a written notice of demand for substantial
          performance has been delivered to the Executive specifying the manner
          in which the Executive has failed substantially to perform, or (ii)
          intentionally engaged in illegal conduct or gross misconduct which
          results in material economic harm to the Company; provided, however,
                                                            --------  -------
          that no termination of the Executive's employment shall be for Cause
          as set forth in clause (ii) above until (x) there shall have been
          delivered to the Executive a copy of a written notice setting forth
          that the Executive was guilty of the conduct set forth in clause (ii)
          and specifying the particulars thereof in detail, and (y) the
          Executive shall have been provided an opportunity to be heard in
          person by the Company's committee of directors (with the assistance of
          the Executive's counsel if the Executive so desires). Any termination
          of the Executive's employment by the Company hereunder shall be deemed
          to be a termination other than for Cause unless it meets all
          requirements of this Section 9.3.

                                       5
<PAGE>

               9.4.  Change in Control.  For purposes of this Agreement, a
                     -----------------
          "Change in Control" shall have occurred if:

               (i)   a majority of the directors of the Company shall be persons
          other than persons: (A) for whose election proxies shall have been
          solicited by the Company's committee of directors, or (B) who are then
          serving as directors appointed by the Company's committee of directors
          to fill vacancies on the committee of directors caused by death or
          resignation (but not by removal) or to fill newly-created
          directorships;

               (ii)  a majority of the outstanding voting power of the Company
          shall have been acquired or beneficially owned (as defined in Rule
          13d-3 under the 1934 Act or any successor rule thereto) by any person
          (other than the Company, a subsidiary of the Company, an affiliate of
          the Company or the Executive) or Group (as defined below), which Group
          does not include the Executive; or

               (iii) there shall have occurred:

                     (A)  a merger or consolidation of the Company with or into
               another corporation (other than (1) a merger or consolidation
               with a subsidiary of the Company or (2) a merger or consolidation
               in which (a) the holders of voting stock of the Company
               immediately prior to the merger as a class continue to hold
               immediately after the merger at least a majority of all
               outstanding voting power of the surviving or resulting
               corporation or its parent and (b) all holders of each outstanding
               class or series of voting stock of the Company immediately prior
               to the merger or consolidation have the right to receive
               substantially the same cash, securities or other property in
               exchange for their voting stock of the Company as all other
               holders of such class or series);

                    (B)  a statutory exchange of shares of one or more classes
               or series of outstanding voting stock of the Company for cash,
               securities or other property;

                    (C)  the sale or other disposition of all or substantially
               all of the assets of the Company (in one transaction or a series
               of transactions); or

                    (D)  the liquidation or dissolution of the Company;

          unless more than twenty-five percent (25%) of the voting stock (or the
          voting equity interest) of the surviving corporation or the
          corporation or other entity acquiring all or substantially all of the
          assets of the Company (in the case of a merger, consolidation or
          disposition of assets) or of the Company or its resulting

                                       6
<PAGE>

          parent corporation (in the case of a statutory share exchange) is
          beneficially owned by the Executive or a Group that includes the
          Executive.

               9.5.  Group. For purposes of this Agreement, "Group" shall mean
                     -----
          any two or more persons acting as a partnership, limited partnership,
          syndicate, or other group acting in concert for the purpose of
          acquiring, holding or disposing of voting stock of the Company.

               9.6.  Disability. For purposes of this Agreement, "Disability"
                     ----------
          shall mean a physical or mental infirmity which impairs the
          Executive's ability to substantially perform his duties with the
          Company for a period of one hundred eighty (180) consecutive days and
          the Executive has not returned to his full time employment prior to
          the Termination Date as stated in the "Notice of Termination" (as
          hereinafter defined).

               9.7.  Good Reason.
                     -----------

                     9.7.1.  For purposes of this Agreement, "Good Reason" shall
          mean a good faith determination by the Executive that any one or more
          of the following events has occurred:

                     (i)      a reduction by the Company in the Executive's Base
               Salary, as the same may be increased from time to time;

                     (ii)     the Company's requiring the Executive to be based
               anywhere other than within fifty (50) miles of the Executive's
               job location as of the date hereof, except for reasonably
               required travel on the Company's business which is not greater
               than such travel requirements prior to the date hereof;

                     (ii)     the taking of any action by the Company that would
               materially adversely affect the physical conditions existing in
               or under which the Executive performs his employment duties;

                     (iv)     any purported termination of the Executive's
               employment for Cause by the Company which does not comply with
               the terms of Section 9.3 hereof; or

                     (v)      any breach by the Company of any provision of this
               Agreement.

                     9.7.2.  The Executive's right to terminate his employment
          pursuant to this Section 9 shall not be affected by his incapacity due
          to physical or mental illness.

                                       7
<PAGE>

               9.8.  Notice of Termination.  For purposes of this Agreement,
                     ---------------------
          "Notice of Termination" shall mean a written notice of termination
          from the Company of the Executive's employment which indicates the
          specific termination provision in this Agreement relied upon and which
          sets forth in reasonable detail the facts and circumstances claimed to
          provide a basis for termination of the Executive's employment under
          the provision so indicated.

               9.9.  Termination Date.  For purposes of this Agreement,
                     ----------------
          "Termination Date" shall mean, in the case of the Executive's death,
          his date of death, in the case of the Executive's voluntary
          termination, the last day of employment, and in all other cases (other
          than in the case of a successor or an assignee, which is provided for
          in Section 12.1 hereof), the date specified in the Notice of
          Termination; provided, however, that if the Executive's employment is
                       --------  -------
          terminated by the Company for Cause or due to Disability, the date
          specified in the Notice of Termination shall be at least thirty (30)
          days from the date the Notice of Termination is given to the
          Executive; and provided further that in the case of Disability the
                         -------- -------
          Executive shall not have returned to the full-time performance of his
          duties during such period of at least thirty (30) days.

     10.  Benefits and Payments Upon Termination of Employment.
          ----------------------------------------------------

               10.1. Compensation and Benefits.  If, during the term of this
                     -------------------------
          Agreement, the Executive's employment with the Company shall be
          terminated, the Executive shall be entitled to the following
          compensation and benefits in the following circumstances:

               (i)  If the Executive's employment with the Company shall be
          terminated by the Company for Cause or pursuant to Section 11.3
          hereof, then the Company shall pay to the Executive all Accrued
          Compensation.

               (ii) If the Executive's employment with the Company shall be
          terminated by the Company due to Disability or by reason of the
          Executive's death, then the Company shall pay to the Executive all
          Accrued Compensation and the restrictions on any outstanding incentive
          awards (including, without limitation, restricted stock and granted
          performance shares or units) under any incentive plan or arrangement
          shall lapse and such incentive award shall become 100% vested, all
          stock options, warrants and stock appreciation rights granted to the
          Executive on or prior to the date of this Agreement shall become
          immediately exercisable and 100% vested and, notwithstanding anything
          to the contrary contained in the plan, agreement or other instrument
          relating to such stock option, warrant or stock appreciation rights
          with regard to the period of time within which such stock option,
          warrant or stock appreciation rights must be exercised following the
          Executive's termination of employment or provision of services to the
          Company, all such stock options, warrants and stock appreciation
          rights may be exercised at

                                       8
<PAGE>

          any time and from time to time until the one (1) year anniversary of
          the Termination Date, and all performance units granted to the
          Executive shall become 100% vested.

               (iii) If the Executive's employment with the Company shall be
          terminated (A) by the Company pursuant to Section 11.2 hereof or (B)
          by the Executive pursuant to Section 11.4 hereof, then the Executive
          shall be entitled to the following:

                      (1)  the Company shall pay the Executive all Accrued
               Compensation;

                      (2)  the Company shall pay the Executive as severance pay
               and in lieu of any further compensation for periods subsequent to
               the Termination Date an amount in cash equal to 25% of the Base
               Amount;

                      (3)  six (6) months or such longer period as may be
               provided by the terms of the appropriate program, practice or
               policy, the Company shall, at its expense, continue on behalf of
               the Executive and his dependents and beneficiaries the life
               insurance, disability, medical, dental and hospitalization
               benefits generally made available to the Company's executive
               officers at any time during the 90-day period prior to the
               Termination Date or at any time thereafter, provided that the
                                                           --------
               Company's obligation hereunder with respect to the foregoing
               benefits shall be limited to the extent that the Executive
               obtains any such benefits pursuant to a subsequent employer's
               benefit plans, in which case the Company may reduce the coverage
               of any benefits it is required to provide the Executive hereunder
               as long as the aggregate coverages and benefits of the combined
               benefit plans are no less favorable to the Executive than the
               coverages and benefits required to be provided hereunder;

                      (4)  the restrictions on any outstanding incentive awards
               (including, without limitation, restricted stock and granted
               performance shares or units) under any incentive plan or
               arrangement shall lapse and such incentive award shall become
               100% vested, all stock options, warrants and stock appreciation
               rights granted to the Executive on or prior to the date of this
               Agreement shall become immediately exercisable and 100% vested
               and, notwithstanding anything to the contrary contained in the
               plan, agreement or other instrument relating to such stock
               option, warrant or stock appreciation rights with regard to the
               period of time within which such stock option, warrant or stock
               appreciation rights must be exercised following the Executive's
               termination of employment or provision of services to the
               Company, all such stock options, warrants and stock appreciation
               rights may be exercised at any time and from time to

                                       9
<PAGE>

               time until the tenth (10th) year anniversary of the Termination
               Date, and all performance units granted to the Executive shall
               become 100% vested; and

               (iv)   The amounts provided for in subsection 10.1(i) shall be
          payable to Executive in a lump-sum on the Termination Date. The
          amounts provided for in subsection 10.1(iii) shall be payable to the
          Executive in substantially equal bi-weekly installments for a six (6)
          month period commending on the Termination Date and otherwise in
          accordance with the Company's payroll practices in effect from time to
          time.

               (iiii) The Executive shall not be required to mitigate the amount
          of any payment provided for in this Agreement by seeking other
          employment or otherwise, and no such payment shall be offset or
          reduced by the amount of any compensation or benefits provided to the
          Executive in any subsequent employment, except as provided in
          subsection 10.1(iii)(3).

               10.2.  No Severance.  The severance pay and benefits provided for
                      ------------
          in this Section 10 shall be in lieu of any other severance or
          termination pay to which the Executive may be entitled under any
          Company severance or termination plan, program, practice or
          arrangement.

               10.3.  Other Compensation and Benefits.  The Executive's
                      -------------------------------
          entitlement to any other compensation or benefits shall be determined
          in accordance with the Company's Executive benefit plans and other
          applicable programs, policies and practices then in effect.

     11.  Termination.  The Executive's employment hereunder may be terminated
          -----------
without any breach of this Agreement only in accordance with this Section 11.

               11.1.  Termination by the Company for Cause.  The Company may
                      ------------------------------------
          terminate the Executive's employment at any time for Cause by
          providing to the Executive a Notice of Termination, whereupon the
          Executive shall be entitled to all of the benefits and payments
          provided for under Section 10 hereof.

               11.2.  Termination by the Company without Cause.  The Company may
                      ----------------------------------------
          terminate the Executive's employment at any time without Cause by
          providing to the Executive a Notice of Termination, whereupon the
          Executive shall be entitled to all of the benefits and payments
          provided for under Section 10 hereof.

               11.3.  Termination by the Executive.  The Executive's employment
                      ----------------------------
          may be terminated by the Executive at any time by providing the
          Company with notice of such termination and specifying in the notice
          the effective date of such termination, which shall not be less than
          ninety (90) days after giving such notice, whereupon the Executive's
          employment shall terminate on the date specified in

                                       10
<PAGE>

          such notice and the Executive shall be entitled to all of the benefits
          and payments provided for under Section 10 hereof; provided, however,
                                                             --------  -------
          that following receipt of such notice, the Company may specify, in its
          discretion, the date on which the Executive's employment shall
          terminate so long as the date so specified is not more than ninety
          (90) days after the date on which the Executive shall have given
          notice, in which case the Executive's employment shall terminate on
          the date so specified by the Company.

               11.4.  Termination by the Executive for Good Reason following a
                      --------------------------------------------------------
          Change of Control. For a one (1) year period following a Change of
          -----------------
          Control, the Executive's employment may be terminated by Executive for
          Good Reason at any time during such one (1) year period by providing
          the Company with a notice of such termination and specifying in the
          notice the effective date of such termination, whereupon the
          Executive's employment shall terminate on the date specified in such
          notice and the Executive shall be entitled to all of the benefits and
          payments provided for under Section 10 hereof.

               11.5.  Termination Upon Disability.  The Company may terminate
                      ---------------------------
          the Executive's employment upon the Disability of the Executive by
          providing to the Executive a Notice of Termination, whereupon the
          Executive shall be entitled to all of the benefits and payments
          provided for under Section 10 hereof.

               11.6.  Death.  In the event of the Executive's death during his
                      -----
          employment hereunder, the Executive's employment shall be
          automatically terminated, whereupon the Executive shall be entitled to
          all of the benefits and payments provided under Section 10 hereof.

     12.  Successors and Assigns.
          ----------------------

               12.1.  Assumption and Agreement.  This Agreement shall be binding
                      ------------------------
          upon and shall inure to the benefit of the Company, its successors and
          assigns, and the Company will require any successor (whether direct or
          indirect, by purchase, merger, consolidation or otherwise) or assign,
          by agreement in form and substance satisfactory to the Executive, to
          expressly assume and agree to perform this Agreement in the same
          manner and to the same extent that the Company would be required to
          perform it if no such succession or assignment had taken place.
          Failure of the Company to obtain such assumption and agreement prior
          to the effectiveness of any such succession or assignment shall be a
          breach of this Agreement and shall entitle the Executive to
          compensation from the Company in the same amount and on the same terms
          as he would be entitled to hereunder if his employment had been
          terminated pursuant to Section 11.2 hereof, except that for purposes
          of implementing the foregoing, the date on which any such succession
          or assignment becomes effective shall be deemed the Termination Date
          hereunder. As used in the Agreement, Company shall mean the Company as

                                       11
<PAGE>

          hereinbefore defined and any successor or assign that executes and
          delivers the agreement provided for in this Section 12.1 or which
          otherwise becomes bound by all the terms and provisions of this
          Agreement by operation of law.

               12.2.  Rights of Executive.  This Agreement and all rights of the
                      -------------------
          Executive hereunder shall inure to the benefit of and be enforceable
          by the Executive's personal or legal representatives, executors,
          administrators, successors, heirs, distributees, devises and legatees.
          If the Executive should die while any amounts would still be payable
          to him hereunder if he had continued to live, all such amounts, unless
          otherwise provided herein, shall be paid in accordance with the terms
          of this Agreement to the Executive's devise, legatee or other designee
          or, if there be no such designee, to the Executive's estate.

     13.  Injunctive Relief.  The Company and the Executive agree that damages
          -----------------
are an inadequate remedy for, and that the Company or any successor to the
business of the Company would be irreparably harmed by, any breach of Section 8
of this Agreement, and that the Company, any successor to the business of the
Company or any permitted assignee of the Company shall be entitled to equitable
relief in the form of a preliminary or permanent injunction upon any breach of
Section 8 hereof.

     15.  Notices.  For the purpose of this Agreement, notices and all other
          -------
communications to either party hereunder provided for in the Agreement shall be
in writing and shall be deemed to have been duly given when delivered in person
or mailed by first-class mail or airmail, postage prepaid, addressed:

          If to the Executive:

          Scott H. Barber
          6486 Williamson Avenue N.E.
          Atlanta, GA  30097

          If to the Company:

          Grace Development, Inc.
          1690 Chantilly Drive
          Atlanta, Georgia  30324

or to such other address(es) as either party may have furnished to the other
party in writing in accordance with this Section.

     16.  Miscellaneous.  No provision of this Agreement may be amended,
          -------------
modified or waived unless such amendment, modification or waiver (i) is agreed
to in writing and is signed by the Executive and a representative of the
Company, its successor or permitted assignee and (ii) has been approved by the
committee of directors of the Company, its successor or any permitted assignee
of the Company. No waiver by either party to this Agreement at any time of

                                       12
<PAGE>

breach by the other party of, or compliance by the other party with, any
condition or provision of this Agreement to be performed by the other party
shall be deemed to be a waiver of similar or dissimilar provisions or conditions
at the same or any prior or subsequent time. No agreements or representations,
oral or otherwise, expressed or implied, with respect to the subject matter of
this Agreement have been made by either party that are not expressly set forth
in this Agreement.

     17.  Validity.  The invalidity or unenforceability of any provision or
          --------
provisions of this Agreement shall not affect the validity or enforceability of
the other provisions of this Agreement, which other provisions shall remain in
full force and effect, nor shall the invalidity or unenforceability of a portion
of any provision of this Agreement affect the validity or enforceability of the
balance of such provision.

     18.  Counterparts.  This document may be executed in two or more
          ------------
counterparts, each of which shall be deemed to be an original and all of which
together shall constitute a single agreement.

     19.  Headings.  The headings of the paragraphs contained in this document
          --------
are for reference purposes only and shall not, in any way, affect the meaning or
interpretation of any provision of this Agreement.

     20.  Applicable Law.  This Agreement shall be governed by and construed in
          --------------
accordance with the internal substantive laws, and not the choice of law rules,
of the State of Georgia.

     21.  Arbitration.  Any controversy or claim arising out of or relating to
          -----------
this Agreement or the breach thereof, other than the provisions of Section 9
hereof, shall, on the written request of one party served upon the other, be
settled by binding arbitration in Fulton County, Georgia in accordance with the
commercial arbitration rules then recognized by the American Arbitration
Association, and judgment upon the award rendered may be entered and enforced in
any court having jurisdiction thereof.

     23.  Entire Agreement. This Agreement constitutes the entire agreement
          ----------------
between the parties hereto and supersedes all prior agreements (if any),
understandings and arrangements (oral or written) between the parties hereto.

                                       13
<PAGE>

     IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
and delivered by its duly authorized officer, and the Executive has executed and
delivered this Agreement, all as of the date first written above.

                                             GRACE DEVELOPMENT, INC.



                                             By: /s/ Benjamin F. Holcomb III
                                                 ----------------------------
                                                   Benjamin F. Holcomb III
                                                   Chief Executive Officer


                                             By: /s/ James M. Blanchard
                                                 ----------------------------
                                                   James M. Blanchard
                                                   President


                                             /s/ Scott H. Barber
                                             --------------------------------
                                             SCOTT H. BARBER

                                       14