Document:

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                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT

     This Amended and Restated Employment Agreement (the "Agreement") is made as
of December 8, 2000 and amends and restates in its entirety the Employment
Agreement made and entered into as of January 2, 1998, as amended and restated
as of February 11, 1998 and as of December 17, 1998, by and between Anthony A.
Nichols, Sr. ("Employee") and Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company").

                                   BACKGROUND

     The Company desires to employ Employee, and Employee desires to enter into
the employ of the Company, on the terms and conditions contained in this
Agreement.

     NOW, THEREFORE, in consideration of the mutual agreements contained herein,
and intending to be legally bound hereby, the parties hereto agree as follows:

     1. Employment. The Company hereby employs Employee, and Employee hereby
accepts employment by the Company, for the period and upon the terms and
conditions contained in this Agreement.

     2. Office and Duties.

     (1) Employee shall be employed by the Company as its Chairman of the Board
and will serve as a member of the Board of Trustees of the Company (the "Board")
and as Chairman of the Executive Committee of the Board, and shall perform such
duties and shall have such authority as may from time to time be specified by
the Board. Employee shall report directly to the Board.

     (2) Without further consideration, Employee shall, as directed by the
Board, serve as a director or officer of, or perform such other duties and
services as may be requested for and with respect to, any of the Company's
Subsidiaries, including, without limitation, Brandywine Realty Services
Corporation. As used in this Agreement, the terms "Subsidiary" and
"Subsidiaries" shall mean, with respect to any entity, any corporation,
partnership, limited liability company or other business entity in which the
subject entity has the power (whether by contract, through securities ownership,
or otherwise and whether directly or indirectly through control of one or more
intermediate Subsidiaries) to elect a majority of board of directors or other
governing body, including, in the case of a partnership, a majority of the board
of directors or other governing body of the general partner.

     (3) Employee shall devote his full working time, energy, skill and best
efforts to the performance of his duties hereunder, in a manner which will
faithfully and diligently further the business interests of the Company and its
Subsidiaries.

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     3. Term. Unless sooner terminated as hereinafter provided, the term of
Employee's employment shall extend through December 31, 2003 (the "Term"). The
Term shall automatically renew for additional one-year periods at the expiration
of the then current Term unless either party shall give notice of his or its
election to terminate Employee's employment at least one year prior to the end
of the then-current Term, unless earlier terminated as hereinafter provided.

     4. Base Salary. For all of the services rendered by Employee to the Company
and its Subsidiaries, Employee shall receive an aggregate base salary of
$270,000 per annum during the term of his employment hereunder. Such salary may
be paid, at the election of the Company, either by the Company or by one or more
of its Subsidiaries, in such relative proportions as the Company may determine,
as earned in periodic installments in accordance with the Company's normal
payment policies for executive officers. In the event that the Employee is also
employed during any period by a Subsidiary of the Company, the amount of the
base salary payable by the Company during such period shall be reduced by the
amount of salary received by Employee during such period from such Subsidiary.
Employee's base salary shall be subject to review by the Board not less
frequently than annually, and Employee shall receive such salary increases as
the Board may from time to time approve.

     5. Bonus. Employee shall receive, during the term of his employment
hereunder, such annual bonus as the Board, in its sole discretion, may determine
from time to time. Any such bonus may be based on Employee's annual performance
goals as established by the Board from time to time.

     6. Participation in Incentive Plans. In addition to Employee's eligibility
to receive annual bonuses pursuant to Section 5, Employee shall be entitled to
participate in short-term and long-term incentive plans as shall be maintained
by the Company from time to time on such terms and conditions as shall be
established by the Board.

     7. Prior Warrants. Nothing in this Agreement shall affect the terms and
conditions of warrants granted by the Company to Employee before the date of
this Agreement. Such warrants shall continue in force as in effect immediately
before the date of this Agreement.

     8. Fringe Benefits. Throughout the term of his employment and as long as
they are kept in force by the Company, Employee shall be entitled to participate
in and receive the benefits of any profit sharing plan, retirement plan, health
or other employee benefit plan made available to other executive officers of the
Company, but in no event shall such benefits be less favorable to Employee than
the benefits listed on Schedule A hereto.

     9. Automobile Allowance. Employee shall receive, during the term of his
employment hereunder, an automobile allowance of $833 per month.

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     10. Expenses. The Company shall reimburse Employee for all reasonable,
ordinary and necessary business expenses incurred by Employee in connection with
the performance of Employee's duties hereunder upon receipt of vouchers therefor
and in accordance with the Company's regular reimbursement procedures and
practices in effect from time to time.

     11. Vacation. Employee shall be entitled to a vacation of four (4) weeks
during each twelve (12) month period of his employment hereunder, during which
time Employee's compensation hereunder shall be paid in full. Employee shall be
permitted to carry over unused vacation during each twelve (12) month period
during the term and use such unused vacation in any subsequent twelve (12) month
period during the term.

     12. Disability. If the Board determines in good faith by a vote of a
majority of its members (other than Employee) that Employee is unable to perform
his duties hereunder due to partial or total disability or incapacity resulting
from a mental or physical illness or injury or any similar cause for a period of
one hundred and twenty (120) consecutive days or for a cumulative period of one
hundred and eighty (180) days during any twelve (12) month period, the Company
shall have the right to terminate Employee's employment at any time thereafter.

     13. Death. Employee's employment shall terminate at the time of his death.

     14. Termination of Employment for Cause. The Company may discharge Employee
at any time for Cause. Cause shall mean: (i) habitual intoxication; (ii) drug
addiction; (iii) intentional and willful violation of any express direction of
the Board; (iv) theft, misappropriation or embezzlement of the Company's funds;
(v) conviction of a felony; or (vi) repeated and consistent failure of Employee
to be present at work during regular hours without valid reason therefor.

     15. Termination of Employment Without Cause. The Board, in its sole
discretion, may terminate Employee's employment hereunder without Cause upon 30
days' prior written notice to Employee at any time.

     16. Resignation For Good Reason. Employee's resignation shall be treated as
a "Resignation for Good Reason" if Employee resigns within six (6) months after
any of the following circumstances, unless in the case of the circumstances set
forth in paragraphs (b), (c) or (d) below, such circumstances are fully
corrected within 30 days of Employee's delivery of notice to the Company:

          (1) A reduction in Employee's annual rate of base salary;

          (2) A failure of the Company to make the payments required by Section
     4 hereof;

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          (3) A significant adverse alteration in the nature or status of
     Employee's responsibilities;

          (4) Any other material breach by the Company of this Agreement;

          (5) Relocation (without the written consent of Employee) of the
     Company's executive offices to a location more than 30 miles from its
     current location; or

          (6) Upon a Change of Control (as defined in Section 17).

     17. Change of Control. For purpose of this Agreement, a "Change of Control"
means:

          (1) A "Change of Control" within the meaning of Section 1(d) of the
     Brandywine Realty Trust 1997 Long-Term Incentive Plan, as currently in
     effect; or

          (2) The purchase of any common shares of beneficial interest of the
     Company pursuant to a tender or exchange offer other than an offer by the
     Company.

     18. Payments Upon or After Termination of Employment.

          (1) Voluntary Resignation Other than for Good Reason; Termination for
     Cause; Non-Renewal of Employment Agreement. If Employee's employment
     hereunder is terminated before the expiration of the Term because of
     Employee's voluntary resignation (other than a Resignation for Good Reason)
     or because of the Company's termination of Employee's employment for Cause,
     or if Employee's employment is terminated at the expiration of the Term
     following an election by either the Company or Employee not to renew the
     Term pursuant to Section 3, the Company, or at its direction, its
     Subsidiaries shall pay to Employee or, as appropriate, his legal
     representatives, heirs or estate all amounts payable under Sections 4 and 8
     accrued through the applicable date of termination (the "Accrued Amount")
     within 30 days after such date of termination. If Employee's employment is
     terminated by the Company for Cause or by the Employee voluntarily (unless
     such termination of employment is a Resignation for Good Reason), or if
     Employee's employment is terminated at the expiration of the Term following
     an election by either the Company or Employee not to renew the Term
     pursuant to Section 3, the Company shall have no obligation or liability
     hereunder after the date of discharge or termination to pay or provide base
     salary, bonus compensation, fringe benefits, or any other form of
     compensation hereunder other than to pay the Accrued Amount.

          (2) Termination of Employment Because of Death. If Employee's
     employment is terminated as a result of the Employee's death before the
     expiration of the Term, the Company shall pay Employee's legal
     representatives the Accrued Amount as of the date of Employee's death, and,
     in addition, the product of three (3) times the greater of (1) the sum of
     the amounts paid or payable to Employee pursuant to Sections 4 and 5
     hereunder (and the short-term

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     portion of any bonus amounts paid or payable pursuant to Section 6
     hereunder) for the calendar year preceding the calendar year in which the
     death occurs or (2) the sum of the amounts paid or payable to Employee
     pursuant to Sections 4 and 5 hereunder (and the short-term portion of any
     bonus amounts paid or payable pursuant to Section 6 hereunder) during the
     one-year period ending on the date of such death, provided that if such
     date of death occurs before the first anniversary of the date hereof, the
     cash lump sum payment shall be equal to the product of three (3) times the
     sum of (x) Employee's annualized base salary pay rate in effect as of such
     date of death and (y) the maximum bonus that would have been payable for
     the year that includes such date of death if all of the conditions for the
     payment of such maximum bonus had been satisfied, less the proceeds
     receivable by Employee's heirs and legal representatives from any life
     insurance policy provided by the Company.

          (3) Termination of Employment Because of Disability. If Employee's
     employment is terminated by the Company for disability before the
     expiration of the Term, the Company shall pay Employee the Accrued Amount
     as of the such date of termination, and, in addition, the consideration
     described in Sections 4 and 8 hereof, at the rate in effect at the date of
     termination, until one year after Employee becomes eligible to receive
     benefits pursuant to the disability insurance policy provided by the
     Company, at the rate in effect at such date of termination, less the amount
     of disability insurance proceeds receivable by Employee, provided that such
     period shall not exceed two years in the aggregate. In addition, Employee
     shall be entitled to receive an amount equal to the product that results
     from multiplying the amount of the bonus paid to him pursuant to Section 5
     hereof for the calendar year prior to the year in which Employee's
     employment is terminated for disability multiplied by a fraction, the
     numerator of which is the number of days that elapsed prior to the
     termination during the year in which the termination occurs and the
     denominator of which is 365.

          (4) Termination of Employment by Company Without Cause; Resignation
     for Good Reason. If Employee's employment is terminated by the Company
     without Cause, or Employee Resigns for Good Reason, within 30 days
     following the date of such termination of employment, the Company shall pay
     Employee the Accrued Amount as of the date of such termination, and in
     addition, the Company shall make a cash lump sum payment to Employee equal
     to the sum of (x) the greater of the amount described in (i) or (ii) below,
     plus (y) the "Gross-Up Payment," as defined and more fully provided for in
     Section 18(g).

               (1) the product of three (3) times the greater of (1) the sum of
          the amounts paid or payable to Employee pursuant to Sections 4 and 5
          hereunder (and the short-term portion of any bonus amounts paid or
          payable pursuant to Section 6 hereunder) for the calendar year
          preceding the calendar year in which such termination of employment
          occurs or (2) the sum of the amounts paid or payable to Employee
          pursuant to Sections 4 and 5 hereunder (and the short-term portion of
          any bonus amounts paid or payable pursuant to Section 6 hereunder)
          during the one-year period ending on the date of such termination; or

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               (2) The amount payable pursuant to Section 4 hereunder for the
          remainder of the Term at a rate equal to his base salary in effect at
          the time of the date of such termination.

          (5) In the event that Employee is employed by a Subsidiary of the
     Company at the time of termination of employment, any amounts payable to
     the Employee pursuant to this Section 18 shall be reduced by the amounts
     paid to Employee by any such Subsidiary.

          (6) Upon the payment of the amounts payable under this Section 18,
     neither the Company nor any of its Subsidiaries shall have any further
     obligations hereunder to Employee (or to his estate, heirs, beneficiaries,
     or legal representatives, as appropriate, or otherwise) to pay or provide
     any base salary, bonus compensation, or fringe benefits, provided that if
     Employee Resigns for Good Reason or the Company terminates Employee's
     employment without Cause, Company shall, at its own expense, for a
     thirty-six (36) month period after the date of termination of employment,
     arrange to provide Employee with life, disability, accident and health
     insurance benefits substantially similar to those which Employee was
     entitled to receive immediately prior to such date of termination.

          (7) "Gross-Up Payment."

          (1) For purposes of this Agreement, the term "Gross-Up Payment" means
     an amount such that the net amount retained by Employee, after deduction of
     the excise tax imposed under section 4999 of the Internal Revenue Code of
     1986, as amended (the "Code") or any successor provision of law ("Excise
     Tax"), on the "Total Payments" (as hereinafter defined) and any federal,
     state and local income tax, employment tax and Excise Tax upon the payment
     provided for by this Section 18(g), shall be equal to the excess of the
     Total Payments (including the payment provided for in clause (y) of Section
     18(d) and in this Section 18(g)) over the payment provided for by this
     Section 18(g).

          (2) For purposes of determining whether any of the Total Payments will
     be subject to Excise Tax and the amount of such Excise Tax,

               (1) any payments or benefits received or to be received by
          Employee in connection with a Change of Control or Employee's
          termination of employment (whether pursuant to the terms of this
          Agreement or any other plan, arrangement or agreement with the Company
          or a Subsidiary, any person whose actions result in a Change of
          Control or any person affiliated with the Company or such person (the
          "Total Payments")) shall be treated as "parachute payments" (within
          the meaning of section 280G(b)(2) of the Code) unless, in the opinion
          of a tax advisor selected by the Company's independent auditors and
          reasonably acceptable to Employee, such payments or benefits (in whole
          or in part) do not constitute parachute payments, including by reason
          of section 280G(b)(4)(A) of the Code, and all "excess parachute
          payments" (within the meaning of section 280G(b)(1) of the Code) shall
          be treated as

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          subject to Excise Tax unless, in the opinion of such tax counsel,
          such excess parachute payments (in whole or in part) represent
          reasonable compensation for services actually rendered (within the
          meaning of section 280G(b)(4)(B) of the Code), or are otherwise not
          subject to Excise Tax; and

               (2) the value of any noncash benefits or deferred payment or
          benefit shall be determined by the Company's independent auditors in
          accordance with the principles of sections 280G(d)(3) and (4) of the
          Code. For purposes of determining the amount of the Gross-Up Payment,
          Employee shall be deemed to pay federal income tax at the highest
          marginal rate of federal income taxation in the calendar year in which
          the Gross-Up Payment is to be made and state and local income taxes at
          the highest marginal rate of taxation in the state and locality of
          Employee's residence on the date of Employee's termination of
          employment (or such other time as is hereinafter described), net of
          the maximum reduction in federal income taxes which could be obtained
          from the deduction of such state and local taxes.

               (3) Notwithstanding the foregoing, if the Excise Tax is
          subsequently determined to be less than the amount taken into account
          hereunder at the time of termination of Employee's employment,
          Employee shall repay to the Company, at the time that the amount of
          such reduction in Excise Tax is finally determined, the portion of the
          Gross-Up Payment attributable to such reduction (plus that portion of
          the Gross-Up Payment attributable to the Excise Tax and federal, state
          and local income tax imposed on the Gross-Up Payment being repaid by
          Employee to the extent that such repayment results in a reduction in
          Excise Tax or a federal, state or local income tax deduction), plus
          interest on the amount of such repayment at the rate provided in
          section 1274(b)(2)(B) of the Code. If the Excise Tax is subsequently
          determined to exceed the amount taken into account hereunder at the
          time of termination of Employee's employment (including by reason of
          any payment the existence or amount of which cannot be determined at
          the time of the Gross-Up Payment), the Company shall make an
          additional Gross-Up Payment in respect of such excess (plus any
          interest, penalties or additions payable by Employee with respect to
          such excess) at the time that the amount of such excess is finally
          determined. Employee and the Company shall each reasonably cooperate
          with the other in connection with any administrative or judicial
          proceedings concerning the existence or amount of liability for Excise
          Tax with respect to the Total Payments. Such additional payment shall
          be made within 30 days following the date Employee notifies the
          Company that he is subject to the Excise Tax.

               (4) The Company shall promptly pay in advance or reimburse
          Employee for all reasonable legal fees and expenses incurred in good
          faith by Employee in connection with any tax audit or proceeding to
          the extent attributable to the application of section 4999 of the Code
          to any payment or benefit provided hereunder.

     19. Prior Agreement. This Agreement is the successor to the Employment
Agreement between Employee and the Company dated as of July 31, 1996 (which
Agreement was assigned to the Company as of October 31, 1996). Employee
represents to the Company that (a) there are no other agreements or
understandings with the Company to which Employee is a

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party relating to employment, benefits or retirement, (b) there are no
restrictions, agreements or understandings whatsoever to which Employee is a
party which would prevent or make unlawful his execution of this Agreement or
his employment hereunder, (c) his execution of this Agreement and his employment
hereunder shall not constitute a breach of any contract, agreement or
understanding, oral or written, to which he is a party or by which he is bound,
and (d) he is free and able to execute this Agreement and to continue in the
employment of the Company.

     20. Key Man Insurance. The Company shall have the right at its expense to
purchase insurance on the life of Employee in such amounts as it shall from time
to time determine, of which the Company shall be the beneficiary. Employee shall
submit to such physical examinations as may be required, and shall otherwise
cooperate with the Company, in connection with the Company obtaining such
insurance.

     21. Miscellaneous.

               (1) Controlling Law. This Agreement, and all questions relating
          to its validity, interpretation, performance and enforcement, shall be
          governed by and construed in accordance with the laws of the
          Commonwealth of Pennsylvania.

               (2) Notices. All notices, requests, demands and other
          communications required or permitted under this Agreement shall be in
          writing and shall be deemed to have been duly given, made and received
          when delivered in person against receipt, or when sent by United
          States registered or certified mail, return receipt requested, postage
          prepaid, addressed as set forth below:

                   (1)  If to Employee:

                        Anthony A. Nichols, Sr.
                        1125 Cymry Drive
                        Newtown Square, PA 19073

                   (2)  If to the Company:

                        Brandywine Realty Trust
                        16 Campus Boulevard
                        Suite 150
                        Newtown Square, PA 19073
                        Attention: General Counsel

     In addition, notice by mail shall be by air mail if posted outside of the
continental United States.

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     Any party may alter the address to which communications or copies are to be
sent by giving notice of such change of address in conformity with the
provisions of this paragraph for the giving of notice.

               (3) Binding Nature of Agreement. This Agreement shall be binding
          upon and inure to the benefit of the Company and its successors and
          assigns and shall be binding upon Employee, his heirs and legal
          representatives.

               (4) Execution in Counterparts. This Agreement may be executed in
          any number of counterparts, each of which shall be deemed to be an
          original as against any party who executes the same, and all of which
          shall constitute one and the same instrument. This Agreement shall
          become binding when one or more counterparts hereof, individually or
          taken together, shall bear the signatures of all of the parties
          reflected hereon as the signatories.

               (5) Provisions Separable. The provisions of this Agreement are
          independent of and separable from each other, and no provision shall
          be affected or rendered invalid or unenforceable by virtue of the fact
          that for any reason any other or others of them may be invalid or
          unenforceable in whole or in part.

               (6) Entire Agreement. This Agreement contains the entire
          understanding among the parties hereto with respect to the subject
          matter hereof and supersedes all prior agreements and understandings,
          inducements or conditions, express or implied, oral or written, except
          as herein contained. The express terms hereof control and supersede
          any course of performance and/or usage of the trade inconsistent with
          any of the terms hereof. This Agreement may not be modified or amended
          other than by an agreement in writing.

               (7) Section and Paragraph Headings. The section and paragraph
          headings in this Agreement are for convenience only; they form no part
          of this Agreement and shall not affect its interpretation.

               (8) Gender, Etc. Words used herein, regardless of the number and
          gender specifically used, shall be deemed and construed to include any
          other number, singular or plural, and any other gender, masculine,
          feminine or neuter, as the context requires.

               (9) Number of Days. In computing the number of days for purposes
          of this Agreement, all days shall be counted, including Saturdays,
          Sundays and holidays; provided, however, that if the final day of any
          time period falls on a Saturday, Sunday or holiday, then the final day
          shall be deemed to be the next day which is not a Saturday, Sunday or
          holiday.

               (10) Survival. The provisions of Sections 7, 12, 13, 14, 15, 16,
          17, 18 and 19 shall survive the expiration or termination of the term
          of Employee's employment hereunder.

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               (11) Assignability. This Agreement is not assignable by Employee.
          It is assignable by the Company only (i) to any subsidiary of the
          Company so long as the Company agrees to guarantee such subsidiary's
          obligations hereunder, or (ii) subject to Sections 16 and 18 and only
          upon Employee's prior written consent, to a person which is a
          successor in interest to the Company in the business operated by it or
          which acquires all or substantially all of its assets.

               (12) Liability of Trustees, etc. No recourse shall be had for any
          obligation of the Company hereunder, or for any claim based thereon or
          otherwise in respect thereof, against any past, present or future
          trustee, shareholder, officer or employee of the Company, whether by
          virtue of any statute or rule of law, or by the enforcement of any
          assessment or penalty or otherwise, all such liability being expressly
          waived and released by each party hereto.

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered on the date first above-written.

                                 BRANDYWINE REALTY TRUST

                                    By: /s/ Gerard H. Sweeney
                                    --------------------------------
                                    Title: President and Chief Executive Officer

                                 EMPLOYEE

                                    /s/ Anthony A. Nichols, Sr.
                                    --------------------------------------------
                                    Anthony A. Nichols, Sr.

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                                    GUARANTEE

     In the event that the Company fails to perform its obligations under the
foregoing Employment Agreement, Brandywine Operating Partnership, L.P. shall
promptly perform the obligations of the Company arising thereunder which have
not been performed in strict accordance with the terms and conditions thereof.

                                         BRANDYWINE OPERATING PARTNERSHIP, L.P.

                                         By:  BRANDYWINE REALTY TRUST, its
                                              general partner

                                              By: /s/ Gerard H. Sweeney
                                              ---------------------------------
                                              Gerard H. Sweeney, President and
                                              Chief Executive Officer

                                      -11-<PAGE>

                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT

     This Amended and Restated Employment Agreement (the "Agreement") is made as
of December 8, 2000 and amends and restates in its entirety the Employment
Agreement made and entered into as of January 2, 1998, as amended and restated
as of February 11, 1998 and as of December 17, 1998, by and between Gerard H.
Sweeney ("Employee") and Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company").

                                   BACKGROUND

     The Company desires to employ Employee, and Employee desires to enter into
the employ of the Company, on the terms and conditions contained in this
Agreement.

     NOW, THEREFORE, in consideration of the mutual agreements contained herein,
and intending to be legally bound hereby, the parties hereto agree as follows:

     1. Employment. The Company hereby employs Employee, and Employee hereby
accepts employment by the Company, for the period and upon the terms and
conditions contained in this Agreement.

     2. Office and Duties.

     (1) Employee shall be employed by the Company as its President and Chief
Executive Officer and will serve as a member of the Board of Trustees of the
Company (the "Board") and member of the Executive Committee of the Board, and
shall perform such duties and shall have such authority as may from time to time
be specified by the Board. Employee shall report directly to the Board.

     (2) Without further consideration, Employee shall, as directed by the
Board, serve as a director or officer of, or perform such other duties and
services as may be requested for and with respect to, any of the Company's
Subsidiaries, including, without limitation, Brandywine Realty Services
Corporation. As used in this Agreement, the terms "Subsidiary" and
"Subsidiaries" shall mean, with respect to any entity, any corporation,
partnership, limited liability company or other business entity in which the
subject entity has the power (whether by contract, through securities ownership,
or otherwise and whether directly or indirectly through control of one or more
intermediate Subsidiaries) to elect a majority of board of directors or other
governing body, including, in the case of a partnership, a majority of the board
of directors or other governing body of the general partner.

     (3) Employee shall devote his full working time, energy, skill and best
efforts to the performance of his duties hereunder, in a manner which will
faithfully and diligently further the business interests of the Company and its
Subsidiaries.

<PAGE>

     3. Term. Unless sooner terminated as hereinafter provided, the term of
Employee's employment shall extend through December 31, 2003 (the "Term"). The
Term shall automatically renew for additional one-year periods at the expiration
of the then current Term unless either party shall give notice of his or its
election to terminate Employee's employment at least one year prior to the end
of the then-current Term, unless earlier terminated as hereinafter provided.

     4. Base Salary. For all of the services rendered by Employee to the Company
and its Subsidiaries, Employee shall receive an aggregate base salary of
$325,000 per annum during the term of his employment hereunder. Such salary may
be paid, at the election of the Company, either by the Company or by one or more
of its Subsidiaries, in such relative proportions as the Company may determine,
as earned in periodic installments in accordance with the Company's normal
payment policies for executive officers. In the event that the Employee is also
employed during any period by a Subsidiary of the Company, the amount of the
base salary payable by the Company during such period shall be reduced by the
amount of salary received by Employee during such period from such Subsidiary.
Employee's base salary shall be subject to review by the Board not less
frequently than annually, and Employee shall receive such salary increases as
the Board may from time to time approve.

     5. Bonus. Employee shall receive, during the term of his employment
hereunder, such annual bonus as the Board, in its sole discretion, may determine
from time to time. Any such bonus may be based on Employee's annual performance
goals as established by the Board from time to time.

     6. Participation in Incentive Plans. In addition to Employee's eligibility
to receive annual bonuses pursuant to Section 5, Employee shall be entitled to
participate in short-term and long-term incentive plans as shall be maintained
by the Company from time to time on such terms and conditions as shall be
established by the Board.

     7. Prior Option and Warrants. Nothing in this Agreement shall affect the
terms and conditions of options and warrants granted by the Company to Employee
before the date of this Agreement. Such options and warrants shall continue in
force as in effect immediately before the date of this Agreement. Without
limiting the generality of the foregoing, the options granted to Employee under
his employment agreement executed on August 8, 1994 (the "1994 Agreement") shall
remain in effect, and those provisions of the 1994 Agreement which govern
Employee's entitlement to exercise such options shall continue in effect as if
such 1994 Agreement had not been terminated. In furtherance of the foregoing,
references in Section 4.1(b)(v) of the 1994 Agreement to "the Company" shall
hereafter be construed as references to the Company and its Subsidiaries.

     8. Fringe Benefits. Throughout the term of his employment and as long as
they are kept in force by the Company, Employee shall be entitled to participate
in and receive the benefits of any profit sharing plan, retirement plan, health
or other employee benefit plan made available to other executive officers of the
Company, but in no event shall such benefits be less favorable to Employee than
the benefits listed on Schedule A hereto.

<PAGE>

     9. Automobile Allowance. Employee shall receive, during the term of his
employment hereunder, an automobile allowance of $833 per month.

     10. Expenses. The Company shall reimburse Employee for all reasonable,
ordinary and necessary business expenses incurred by Employee in connection with
the performance of Employee's duties hereunder upon receipt of vouchers therefor
and in accordance with the Company's regular reimbursement procedures and
practices in effect from time to time.

     11. Vacation. Employee shall be entitled to a vacation of four (4) weeks
during each twelve (12) month period of his employment hereunder, during which
time Employee's compensation hereunder shall be paid in full. Employee shall be
permitted to carry over unused vacation during each twelve (12) month period
during the term and use such unused vacation in any subsequent twelve (12) month
period during the term.

     12. Disability. If the Board determines in good faith by a vote of a
majority of its members (other than Employee) that Employee is unable to perform
his duties hereunder due to partial or total disability or incapacity resulting
from a mental or physical illness or injury or any similar cause for a period of
one hundred and twenty (120) consecutive days or for a cumulative period of one
hundred and eighty (180) days during any twelve (12) month period, the Company
shall have the right to terminate Employee's employment at any time thereafter.

     13. Death. Employee's employment shall terminate at the time of his death.

     14. Termination of Employment for Cause. The Company may discharge Employee
at any time for Cause. Cause shall mean: (i) habitual intoxication; (ii) drug
addiction; (iii) intentional and willful violation of any express direction of
the Board; (iv) theft, misappropriation or embezzlement of the Company's funds;
(v) conviction of a felony; or (vi) repeated and consistent failure of Employee
to be present at work during regular hours without valid reason therefor.

     15. Termination of Employment Without Cause. The Board, in its sole
discretion, may terminate Employee's employment hereunder without Cause upon 30
days' prior written notice to Employee at any time.

     16. Resignation For Good Reason. Employee's resignation shall be treated as
a "Resignation for Good Reason" if Employee resigns within six (6) months after
any of the following circumstances, unless in the case of the circumstances set
forth in paragraphs (b), (c) or (d) below, such circumstances are fully
corrected within 30 days of Employee's delivery of notice to the Company:

          (1) A reduction in Employee's annual rate of base salary;

          (2) A failure of the Company to make the payments required by Section
     4 hereof;

<PAGE>

          (3) A significant adverse alteration in the nature or status of
     Employee's responsibilities;

          (4) Any other material breach by the Company of this Agreement;

          (5) Relocation (without the written consent of Employee) of the
     Company's executive offices to a location more than 30 miles from its
     current location; or

          (6) Upon a Change of Control (as defined in Section 17).

     17. Change of Control. For purpose of this Agreement, a "Change of Control"
means:

          (1) A "Change of Control" within the meaning of Section 1(d) of the
     Brandywine Realty Trust 1997 Long-Term Incentive Plan, as currently in
     effect; or

          (2) The purchase of any common shares of beneficial interest of the
     Company pursuant to a tender or exchange offer other than an offer by the
     Company.

     18. Payments Upon or After Termination of Employment.

          (1) Voluntary Resignation Other than for Good Reason; Termination for
     Cause; Non-Renewal of Employment Agreement. If Employee's employment
     hereunder is terminated before the expiration of the Term because of
     Employee's voluntary resignation (other than a Resignation for Good Reason)
     or because of the Company's termination of Employee's employment for Cause,
     or if Employee's employment is terminated at the expiration of the Term
     following an election by either the Company or Employee not to renew the
     Term pursuant to Section 3, the Company, or at its direction, its
     Subsidiaries shall pay to Employee or, as appropriate, his legal
     representatives, heirs or estate all amounts payable under Sections 4 and 8
     accrued through the applicable date of termination (the "Accrued Amount")
     within 30 days after such date of termination. If Employee's employment is
     terminated by the Company for Cause or by the Employee voluntarily (unless
     such termination of employment is a Resignation for Good Reason), or if
     Employee's employment is terminated at the expiration of the Term following
     an election by either the Company or Employee not to renew the Term
     pursuant to Section 3, the Company shall have no obligation or liability
     hereunder after the date of discharge or termination to pay or provide base
     salary, bonus compensation, fringe benefits, or any other form of
     compensation hereunder other than to pay the Accrued Amount.

          (2) Termination of Employment Because of Death. If Employee's
     employment is terminated as a result of the Employee's death before the
     expiration of the Term, the Company shall pay Employee's legal
     representatives the Accrued Amount as of the date of Employee's death, and,
     in addition, the product of three (3) times the greater of (1) the sum of
     the amounts paid or payable to Employee pursuant to Sections 4 and 5
     hereunder (and the short-term portion of any bonus amounts paid or payable
     pursuant to Section 6 hereunder) for the calendar

<PAGE>

     year preceding the calendar year in which the death occurs or (2) the
     sum of the amounts paid or payable to Employee pursuant to Sections 4 and 5
     hereunder (and the short-term portion of any bonus amounts paid or payable
     pursuant to Section 6 hereunder) during the one-year period ending on the
     date of such death, provided that if such date of death occurs before the
     first anniversary of the date hereof, the cash lump sum payment shall be
     equal to the product of three (3) times the sum of (x) Employee's
     annualized base salary pay rate in effect as of such date of death and (y)
     the maximum bonus that would have been payable for the year that includes
     such date of death if all of the conditions for the payment of such maximum
     bonus had been satisfied, less the proceeds receivable by Employee's heirs
     and legal representatives from any life insurance policy provided by the
     Company.

          (3) Termination of Employment Because of Disability. If Employee's
     employment is terminated by the Company for disability before the
     expiration of the Term, the Company shall pay Employee the Accrued Amount
     as of the such date of termination, and, in addition, the consideration
     described in Sections 4 and 8 hereof, at the rate in effect at the date of
     termination, until one year after Employee becomes eligible to receive
     benefits pursuant to the disability insurance policy provided by the
     Company, at the rate in effect at such date of termination, less the amount
     of disability insurance proceeds receivable by Employee, provided that such
     period shall not exceed two years in the aggregate. In addition, Employee
     shall be entitled to receive an amount equal to the product that results
     from multiplying the amount of the bonus paid to him pursuant to Section 5
     hereof for the calendar year prior to the year in which Employee's
     employment is terminated for disability multiplied by a fraction, the
     numerator of which is the number of days that elapsed prior to the
     termination during the year in which the termination occurs and the
     denominator of which is 365.

          (4) Termination of Employment by Company Without Cause; Resignation
     for Good Reason. If Employee's employment is terminated by the Company
     without Cause, or Employee Resigns for Good Reason, within 30 days
     following the date of such termination of employment, the Company shall pay
     Employee the Accrued Amount as of the date of such termination, and in
     addition, the Company shall make a cash lump sum payment to Employee equal
     to the sum of (x) the greater of the amount described in (i) or (ii) below,
     plus (y) the "Gross-Up Payment," as defined and more fully provided for in
     Section 18(g).

               (1) the product of three (3) times the greater of (1) the sum of
          the amounts paid or payable to Employee pursuant to Sections 4 and 5
          hereunder (and the short-term portion of any bonus amounts paid or
          payable pursuant to Section 6 hereunder) for the calendar year
          preceding the calendar year in which such termination of employment
          occurs or (2) the sum of the amounts paid or payable to Employee
          pursuant to Sections 4 and 5 hereunder (and the short-term portion of
          any bonus amounts paid or payable pursuant to Section 6 hereunder)
          during the one-year period ending on the date of such termination; or

               (2) The amount payable pursuant to Section 4 hereunder for the
          remainder of the Term at a rate equal to his base salary in effect at
          the time of the date of such termination.

<PAGE>

          (5) In the event that Employee is employed by a Subsidiary of the
     Company at the time of termination of employment, any amounts payable to
     the Employee pursuant to this Section 18 shall be reduced by the amounts
     paid to Employee by any such Subsidiary.

          (6) Upon the payment of the amounts payable under this Section 18,
     neither the Company nor any of its Subsidiaries shall have any further
     obligations hereunder to Employee (or to his estate, heirs, beneficiaries,
     or legal representatives, as appropriate, or otherwise) to pay or provide
     any base salary, bonus compensation, or fringe benefits, provided that if
     Employee Resigns for Good Reason or the Company terminates Employee's
     employment without Cause, Company shall, at its own expense, for a
     thirty-six (36) month period after the date of termination of employment,
     arrange to provide Employee with life, disability, accident and health
     insurance benefits substantially similar to those which Employee was
     entitled to receive immediately prior to such date of termination.

          (7) "Gross-Up Payment."

               (1) For purposes of this Agreement, the term "Gross-Up Payment"
          means an amount such that the net amount retained by Employee, after
          deduction of the excise tax imposed under section 4999 of the Internal
          Revenue Code of 1986, as amended (the "Code") or any successor
          provision of law ("Excise Tax"), on the "Total Payments" (as
          hereinafter defined) and any federal, state and local income tax,
          employment tax and Excise Tax upon the payment provided for by this
          Section 18(g), shall be equal to the excess of the Total Payments
          (including the payment provided for in clause (y) of Section 18(d) and
          in this Section 18(g)) over the payment provided for by this Section
          18(g).

               (2) For purposes of determining whether any of the Total Payments
          will be subject to Excise Tax and the amount of such Excise Tax,

                    (1) any payments or benefits received or to be received by
               Employee in connection with a Change of Control or Employee's
               termination of employment (whether pursuant to the terms of this
               Agreement or any other plan, arrangement or agreement with the
               Company or a Subsidiary, any person whose actions result in a
               Change of Control or any person affiliated with the Company or
               such person (the "Total Payments")) shall be treated as
               "parachute payments" (within the meaning of section 280G(b)(2) of
               the Code) unless, in the opinion of a tax advisor selected by the
               Company's independent auditors and reasonably acceptable to
               Employee, such payments or benefits (in whole or in part) do not
               constitute parachute payments, including by reason of section
               280G(b)(4)(A) of the Code, and all "excess parachute payments"
               (within the meaning of section 280G(b)(1) of the Code) shall be
               treated as subject to Excise Tax unless, in the opinion of such
               tax counsel, such excess parachute payments (in whole or in part)
               represent reasonable compensation for services actually rendered
               (within the meaning of section 280G(b)(4)(B) of the Code), or are
               otherwise not subject to Excise Tax; and

                    (2) the value of any noncash benefits or deferred payment or
               benefit shall be determined by the Company's independent auditors
               in accordance

<PAGE>

               with the principles of sections 280G(d)(3) and (4) of the
               Code. For purposes of determining the amount of the Gross-Up
               Payment, Employee shall be deemed to pay federal income tax at
               the highest marginal rate of federal income taxation in the
               calendar year in which the Gross-Up Payment is to be made and
               state and local income taxes at the highest marginal rate of
               taxation in the state and locality of Employee's residence on the
               date of Employee's termination of employment (or such other time
               as is hereinafter described), net of the maximum reduction in
               federal income taxes which could be obtained from the deduction
               of such state and local taxes.

                    (3) Notwithstanding the foregoing, if the Excise Tax is
               subsequently determined to be less than the amount taken into
               account hereunder at the time of termination of Employee's
               employment, Employee shall repay to the Company, at the time that
               the amount of such reduction in Excise Tax is finally determined,
               the portion of the Gross-Up Payment attributable to such
               reduction (plus that portion of the Gross-Up Payment attributable
               to the Excise Tax and federal, state and local income tax imposed
               on the Gross-Up Payment being repaid by Employee to the extent
               that such repayment results in a reduction in Excise Tax or a
               federal, state or local income tax deduction), plus interest on
               the amount of such repayment at the rate provided in section
               1274(b)(2)(B) of the Code. If the Excise Tax is subsequently
               determined to exceed the amount taken into account hereunder at
               the time of termination of Employee's employment (including by
               reason of any payment the existence or amount of which cannot be
               determined at the time of the Gross-Up Payment), the Company
               shall make an additional Gross-Up Payment in respect of such
               excess (plus any interest, penalties or additions payable by
               Employee with respect to such excess) at the time that the amount
               of such excess is finally determined. Employee and the Company
               shall each reasonably cooperate with the other in connection with
               any administrative or judicial proceedings concerning the
               existence or amount of liability for Excise Tax with respect to
               the Total Payments. Such additional payment shall be made within
               30 days following the date Employee notifies the Company that he
               is subject to the Excise Tax.

                    (4) The Company shall promptly pay in advance or reimburse
               Employee for all reasonable legal fees and expenses incurred in
               good faith by Employee in connection with any tax audit or
               proceeding to the extent attributable to the application of
               section 4999 of the Code to any payment or benefit provided
               hereunder.

     19. Prior Agreement. This Agreement is the successor to the Employment
Agreement between Employee and the Company dated as of July 31, 1996 (which
Agreement was assigned to the Company as of October 31, 1996). Employee
represents to the Company that (a) there are no other agreements or
understandings with the Company to which Employee is a party relating to
employment, benefits or retirement, (b) there are no restrictions, agreements or
understandings whatsoever to which Employee is a party which would prevent or
make unlawful his execution of this Agreement or his employment hereunder, (c)
his execution of this Agreement and his employment hereunder shall not
constitute a breach of any contract, agreement or understanding, oral or
written, to which he is a party or by which he is bound, and (d) he is free and
able to execute this Agreement and to continue in the employment of the Company.

<PAGE>

     20. Key Man Insurance. The Company shall have the right at its expense to
purchase insurance on the life of Employee in such amounts as it shall from time
to time determine, of which the Company shall be the beneficiary. Employee shall
submit to such physical examinations as may be required, and shall otherwise
cooperate with the Company, in connection with the Company obtaining such
insurance.

     21. Miscellaneous.

          (1) Controlling Law. This Agreement, and all questions relating to its
     validity, interpretation, performance and enforcement, shall be governed by
     and construed in accordance with the laws of the Commonwealth of
     Pennsylvania.

          (2) Notices. All notices, requests, demands and other communications
     required or permitted under this Agreement shall be in writing and shall be
     deemed to have been duly given, made and received when delivered in person
     against receipt, or when sent by United States registered or certified
     mail, return receipt requested, postage prepaid, addressed as set forth
     below:

                                        (1)  If to Employee:

                                             Gerard H. Sweeney
                                             2 Craig Lane
                                             Haverford, PA 19041

                                        (2)  If to the Company:

                                             Brandywine Realty Trust
                                             16 Campus Boulevard
                                             Suite 150
                                             Newtown Square, PA 19073
                                             Attention: General Counsel

     In addition, notice by mail shall be by air mail if posted outside of the
continental United States.

     Any party may alter the address to which communications or copies are to be
sent by giving notice of such change of address in conformity with the
provisions of this paragraph for the giving of notice.

          (3) Binding Nature of Agreement. This Agreement shall be binding upon
     and inure to the benefit of the Company and its successors and assigns and
     shall be binding upon Employee, his heirs and legal representatives.

          (4) Execution in Counterparts. This Agreement may be executed in any
     number of counterparts, each of which shall be deemed to be an original as
     against any party who executes the same, and all of which shall constitute
     one and the same instrument. This

<PAGE>

     Agreement shall become binding when one or more counterparts hereof,
     individually or taken together, shall bear the signatures of all of the
     parties reflected hereon as the signatories.

          (5) Provisions Separable. The provisions of this Agreement are
     independent of and separable from each other, and no provision shall be
     affected or rendered invalid or unenforceable by virtue of the fact that
     for any reason any other or others of them may be invalid or unenforceable
     in whole or in part.

          (6) Entire Agreement. This Agreement contains the entire understanding
     among the parties hereto with respect to the subject matter hereof and
     supersedes all prior agreements and understandings, inducements or
     conditions, express or implied, oral or written, except as herein
     contained. The express terms hereof control and supersede any course of
     performance and/or usage of the trade inconsistent with any of the terms
     hereof. This Agreement may not be modified or amended other than by an
     agreement in writing.

          (7) Section and Paragraph Headings. The section and paragraph headings
     in this Agreement are for convenience only; they form no part of this
     Agreement and shall not affect its interpretation.

          (8) Gender, Etc. Words used herein, regardless of the number and
     gender specifically used, shall be deemed and construed to include any
     other number, singular or plural, and any other gender, masculine, feminine
     or neuter, as the context requires.

          (9) Number of Days. In computing the number of days for purposes of
     this Agreement, all days shall be counted, including Saturdays, Sundays and
     holidays; provided, however, that if the final day of any time period falls
     on a Saturday, Sunday or holiday, then the final day shall be deemed to be
     the next day which is not a Saturday, Sunday or holiday.

          (10) Survival. The provisions of Sections 7, 12, 13, 14, 15, 16, 17,
     18 and 19 shall survive the expiration or termination of the term of
     Employee's employment hereunder.

          (11) Assignability. This Agreement is not assignable by Employee. It
     is assignable by the Company only (i) to any subsidiary of the Company so
     long as the Company agrees to guarantee such subsidiary's obligations
     hereunder, or (ii) subject to Sections 16 and 18 and only upon Employee's
     prior written consent, to a person which is a successor in interest to the
     Company in the business operated by it or which acquires all or
     substantially all of its assets.

          (12) Liability of Trustees, etc. No recourse shall be had for any
     obligation of the Company hereunder, or for any claim based thereon or
     otherwise in respect thereof, against any past, present or future trustee,
     shareholder, officer or employee of the Company, whether by virtue of any
     statute or rule of law, or by the enforcement of any assessment or penalty
     or otherwise, all such liability being expressly waived and released by
     each party hereto.

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered on the date first above-written.

                                        BRANDYWINE REALTY TRUST

                                        By: /s/ Anthony A. Nichols, Sr.
                                            ------------------------------------

                                        Title: Chairman of the Board
                                               ---------------------------------

                                        EMPLOYEE

                                        /s/ Gerard H. Sweeney
                                        ----------------------------------------
                                        Gerard H. Sweeney

<PAGE>

                                    GUARANTEE

     In the event that the Company fails to perform its obligations under the
foregoing Employment Agreement, Brandywine Operating Partnership, L.P. shall
promptly perform the obligations of the Company arising thereunder which have
not been performed in strict accordance with the terms and conditions thereof.

                                        BRANDYWINE OPERATING PARTNERSHIP, L.P.

                                        By: BRANDYWINE REALTY TRUST, its
                                            general partner

                                            By: /s/ Anthony A. Nichols, Sr.
                                                --------------------------------
                                                Anthony A. Nichols, Sr.
                                                Chairman of the Board

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