EXHIBIT 10.29 BRANDYWINE REALTY TRUST AMENDED AND RESTATED EXECUTIVE DEFERRED COMPENSATION PLAN

EXHIBIT 10.29

BRANDYWINE REALTY TRUST

AMENDED AND RESTATED

EXECUTIVE DEFERRED COMPENSATION PLAN

(As Amended and Restated, Effective January 1, 2009)

ARTICLE 1

PURPOSE

          The Board of Trustees of Brandywine Realty Trust (the “ Board ”) adopted the Brandywine Realty Trust Executive Deferred Compensation Plan (the “ Plan ”), effective January 1, 2005 (the “ Effective Date ”). Effective March 31, 2006 (the “ Transfer Date ”), all of the assets, liabilities and obligations under the Prentiss Properties Executive Choice Share Deferral Plan, the Prentiss Properties Executive Choice Deferred Compensation Plan, the Prentiss Properties Executive Choice Deferred Compensation Plan for Trustees and the Prentiss Properties Executive Choice Share Deferral Plan for Trustees, were assumed by the Plan, and such Prior Plans were terminated. This amendment and restatement, effective January 1, 2009 (the “ Restatement Date ”), except as otherwise provided herein, also includes certain other changes with respect to eligibility, share-based grants and diversification rights, dividend allocations and other design and compliance changes.

          Prior to the Effective Date, the Pre-2005 Brandywine Realty Trust Executive Deferred Compensation Plan (the “ Pre-2005 EDCP ”) was in effect. In order to preserve the favorable tax treatment available to deferrals under the Pre-2005 EDCP due to the American Jobs Creation Act of 2004, the regulations and Internal Revenue guidance issued thereunder (collectively, the “ AJCA ”), the Board froze the Pre-2005 EDCP with respect to amounts earned and vested on and after the Effective Date. Amounts earned and vested prior to the Effective Date are and will remain subject to the terms of the Pre-2005 EDCP.

          All amounts earned and vested on and after the Effective Date are subject to the terms of the Plan. The Plan retains many of the attributes of the Pre-2005 EDCP, but is modified so as to achieve compliance with the requirements of the AJCA. The Board reserves the right to amend the Plan, either retroactively or prospectively, in whatever respect is required to achieve compliance with the requirements of the AJCA.

ARTICLE 2

DEFINITIONS

          “ Additional Company Contributions ” are contributions credited to the Participant’s Retirement Distribution Account by the Company pursuant to Section 4.6.

          “ Affiliate ” means: (a) any firm, partnership, or corporation that directly or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with Brandywine Realty Trust; (b) any other organization similarly related to Brandywine Realty Trust that is designated as such by the Board; and (c) any other entity 50% or more of the economic interests in which are owned, directly or indirectly, by Brandywine Realty Trust.

          “ Beneficiary ” means the person or persons designated as such in accordance with Section 11.4.

          “ Board ” means the Board of Trustees of Brandywine Realty Trust.

          “ Board Remuneration ” means for any Trustee, for any Plan Year, the annual retainer and Board meeting fees; provided that committee fees and informal Board discussion fees shall not be “Board Remuneration;” provided further that such remuneration shall not be eligible for Matching Contributions, Profit Sharing Contributions, Supplemental Profit Sharing Contributions or Additional Company Contributions.

          “ Change of Control ” means, within the meaning of Treas. Reg. 1.409A-3(i)(5) or any succeeding regulations, a change in the ownership or effective control of Brandywine Realty Trust, or a change in the ownership of a substantial portion of the assets of Brandywine Realty Trust.

          “ Code ” means the Internal Revenue Code of 1986, as amended.

          “ Committee ” means the Brandywine Realty Trust Plan Committee, which shall consist of at least one person, the member(s) of which shall be designated from time to time by the President and Chief Executive Officer of Brandywine Realty Trust and which may include the President and Chief Executive Officer.

          “ Company ” means Brandywine Realty Trust and each such subsidiary, division or Affiliate as may from time to time participate in the Plan by or pursuant to authorization of the Board.

          “ Compensation ” means, for any Eligible Employee, for any Plan Year, the Participant’s total taxable income received from the Company with respect to such Plan Year, including, but not limited to, base earnings, regular bonuses, commissions and overtime, plus

pre-tax contributions and elective contributions that are not includible in gross income under section 125, 402(a)(8) or 402(h) of the Code, and excluding income recognized in connection with share-related options and payments, reimbursements and other expense allowances, fringe benefits (cash and noncash), moving expenses, deferred compensation and welfare benefits, as determined pursuant to guidelines established and revised by the Plan Administrator from time to time and communicated to Eligible Employees.

          “ Compensation Deferral ” means that portion of Compensation or Board Remuneration as to which a Participant has made an annual election to defer receipt until the date specified under the In-Service Distribution Option, the Retirement Distribution Option, the Flexible Distribution Option or the Deferred Board Remuneration Option, as applicable.

          “ Compensation Limit ” means the compensation limit of section 401(a)(17) of the Code, as in effect on the first day of the Plan Year.

          “ Deferred Board Remuneration Account ” means the Account maintained for a Participant to which Compensation Deferrals are credited pursuant to the Deferred Board Remuneration Option.

          “ Deferred Board Remuneration Option ” means the Distribution Option pursuant to which benefits are payable in accordance with Section 7.3.

          “ Disability ” means a disability of an Employee or Trustee which renders such Employee or Trustee unable to perform the full extent of his duties and responsibilities by reason of his illness or incapacity which entitles that Employee or Trustee to receive Social Security Disability Income under the Social Security Act, as amended, and the regulations promulgated thereunder.

          “ Disabled ” means having a Disability. The determination of whether a Participant is Disabled shall be made by the Plan Administrator, whose determination shall be conclusive; provided that ,

          (a) if a Participant is bound by the terms of an employment agreement between the Participant and the Employer, whether the Participant is “Disabled” for purposes of the Plan shall be determined in accordance with the procedures set forth in said employment agreement, if such procedures are therein provided; and

          (b) a Participant bound by such an employment agreement shall not be determined to be Disabled under the Plan any earlier than he would be determined to be disabled under his employment agreement; provided that , a Participant may not be determined to be Disabled unless such Participant is unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or can be expected to last for a continuous period of disability of not less than 12 months.

          “ Distribution Date ” means the date determined in accordance with the rules and procedures established by the Plan Administrator.

          “ Distribution Option ” means the four distribution options which are available under the Plan, consisting of the Retirement Distribution Option, the In-Service Distribution Option, the Flexible Distribution Option and the Deferred Board Remuneration Option.

          “ Distribution Option Account(s) ” means, with respect to a Participant, the Retirement Distribution Account, the In-Service Distribution Account, the Flexible Distribution Account and/or the Deferred Board Remuneration Account established on the books of account of the Company, pursuant to Section 5.1.

          “ Earnings Crediting Options ” means the deemed investment options selected by the Participant from time to time pursuant to which deemed earnings are credited to the Participant’s Distribution Option Accounts.

          “ Effective Date ” means January 1, 2005.

          “ Eligible Employee ” means (1) an Employee who is a member of a group of selected management and/or highly compensated Employees of the Company and who is designated by the Plan Administrator as eligible to participate in the Plan, or (2) each Employee who, as of the Transfer Date, was eligible to participate in a Prior Plan.

          “ Employee ” means any individual employed by the Company on a regular, full-time basis (in accordance with the personnel policies and practices of the Company), including citizens of the United States employed outside of their home country and resident aliens employed in the United States; provided, however , that to qualify as an “Employee” for purposes of the Plan, the individual must be a member of a group of “key management or other highly compensated employees” within the meaning of Sections 201, 301 and 401 of the Employee Retirement Income Security Act of 1974, as amended; provided further , that the following individuals shall not be “Employees:” (1) individuals who are not classified by the Company as its employees, even if they are retroactively recharacterized as employees by a third party or the Company; (2) individuals for whom the Company does not report wages on Form W-2 or who are not on an employee payroll of the Company; or (3) individuals who have entered into an agreement with the Company which excludes them from participation in employee benefit plans of the Company (whether or not they are treated or classified as employees for certain specified purposes that do not include eligibility in the Plan).

          “ Employer ” means Brandywine Realty Trust and its Affiliates.

          “ Employer Stock Fund ” means a hypothetical investment fund consisting entirely of Shares.

          “ Enrollment Agreement ” means the authorization form which an Eligible Employee or Trustee files with the Plan Administrator to participate in the Plan.

          “ Excess Bonus ” means that portion of a Compensation Deferral as defined in Section 4.6.

          “ Flexible Distribution Account ” means the account maintained for a Participant to which Share Awards, Performance-Based Compensation and Compensation Deferrals are credited pursuant to the Flexible Distribution Option; provided that, a Participant may designate up to five Flexible Distribution Accounts (i.e., Flexible Distribution Accounts #1, #2, #3, #4 and #5) with different specified payment dates.

          “ Flexible Distribution Option ” means the Distribution Option pursuant to which benefits are payable in accordance with Section 7.4.

          “ In-Service Distribution Account ” means the account maintained for a Participant to which Compensation Deferrals are credited pursuant to the In-Service Distribution Option.

          “ In-Service Distribution Option ” means the Distribution Option pursuant to which benefits are payable in accordance with Section 7.2.

          “ Matching Contributions ” are contributions credited to the Participant’s Retirement Distribution Account by the Company pursuant to Section 4.3.

          “ Offeree ” means an individual designated by the Plan Administrator who has received a written offer of employment from the Company and would be an Eligible Employee upon commencement of employment with the Company.

          “ Participant ” means an Eligible Employee or Trustee who has filed a completed and executed Enrollment Agreement with the Plan Administrator or its designee and is participating in the Plan in accordance with the provisions of Article 4. In the event of the death or incompetency of a Participant, the term shall mean his personal representative or guardian. An individual shall remain a Participant until that individual has received full distribution of any amount credited to the Participant’s Distribution Option Account(s).

          “ Performance-Based Compensation ” means, for any Eligible Employee, Compensation or a Share Award that constitutes “performance-based compensation” within the meaning of Treas. Reg. 1.409A-1(e), or any succeeding regulations, that is payable with respect to a Performance Period, as determined by the Plan Administrator.

          “ Performance Period ” means a period of at least 12 months during which a Participant may earn Performance-Based Compensation.

          “ Plan ” means the Brandywine Realty Trust Executive Deferred Compensation Plan, as amended from time to time.

          “ Plan Administrator ” means the Committee.

          “ Plan Year ” means the 12-month period beginning on each January 1 and ending on the following December 31.

          “ Prior Plan ” means each of (1) the Prentiss Properties Executive Choice Share Deferral Plan, (2) the Prentiss Properties Executive Choice Deferred Compensation Plan, (3) the Prentiss Properties Executive Choice Deferred Compensation Plan for Trustees, and (4) the Prentiss Properties Executive Choice Share Deferral Plan for Trustees and such other legacy deferred compensation arrangements as are designated as a Prior Plan by the Plan Administrator.

          “ Prior Plan Sub-Account ” means the portion of an Eligible Employee’s Account attributable to amounts rolled over to the Plan from a Prior Plan as described in Section 4.1(e).

          “ Profit Sharing Contributions ” are contributions credited to the Participant’s Retirement Distribution Account by the Company, based on a percentage, as determined each year by the Company, of the Participant’s Compensation in excess of the Compensation Limit. To the extent that a contribution is not deemed to be a Profit Sharing Contribution, it will be considered Compensation classified as a bonus for purposes of the Plan.

          “ Re-Deferral Election ” means an election to change the form and commencement date of payment with respect to all or a portion of a Distribution Option Account by filing an election change consistent with the requirements of the Treas. Reg. 1.409A-2(b), or any succeeding regulations. The Plan Administrator reserves the right to and discretion to reject and disallow a Re-Deferral Election for any reason and at any time. A Re-Deferral Election as to a Distribution Option Account: (1) may not accelerate the first or last scheduled payment date with respect to such Distribution Option Account; (2) will not be effective as to any payment from such Distribution Option Account scheduled to be made within 12 months of the Re-Deferral Election; and (3) other than a Re-Deferral Election made in connection with a Participant becoming Disabled or dying, the first payment to which such Re-Deferral Election applies must be deferred by at least five (5) years from the originally scheduled payment date. A change to the form and commencement date of payment pursuant to Section 7.6 shall not be deemed a Re-Deferral Election.

          “ Retirement ” means the termination of the Participant’s Service with the Employer (for reasons other than death) at or after age 55.

          “ Retirement Distribution Account ” means the Account maintained for a Participant to which Share Awards, Performance-Based Compensation, Compensation Deferrals, Matching Contributions, Additional Company Contributions, Profit Sharing Contributions, and Supplemental Profit Sharing Contributions are credited pursuant to the Retirement Distribution Option.

          “ Retirement Distribution Option ” means the Distribution Option pursuant to which benefits are payable in accordance with Section 7.1.

          “ Service ” means the period of time during which an employment relationship exists between an Employee and the Company, including any period during which the Employee is on an approved leave of absence, whether paid or unpaid. “Service” also includes employment with an Affiliate if an Employee transfers directly between the Company and the Affiliate.

          “ Share ” means a common share of beneficial interest, $.01 par value per share, of Brandywine Realty Trust.

          “ Share Award ” means Shares subject to an award under the terms of the Brandywine Realty Trust Amended and Restated 1997 Long-Term Incentive Plan (as amended from time to time) (including the Brandywine Realty Trust 2006 Long-Term Outperformance Compensation Program (as amended from time to time)), or any other equity based compensation plan, program or arrangement sponsored by the Company, as determined by the Plan Administrator.

          “ Supplemental Profit Sharing Contributions ” are contributions credited to the Retirement Distribution Account of certain Participants by the Company pursuant to Section 4.5.

          “ Termination Date ” means the date of termination of a Participant’s Service with the Employer, determined without reference to any compensation continuing arrangement or severance benefit arrangement that may be applicable.

          “ Trustee ” means a member of the Board who receives remuneration payable for services as a member of the Board.

          “ Unforeseeable Emergency ” means a severe financial hardship to the Participant resulting from an illness or accident of the Participant, the Participant’s spouse, or a dependent (as defined in section 152(a) of the Code) of the Participant, loss of the Participant’s property due to casualty, or other similar extraordinary and unforeseeable circumstances arising as a result of events beyond the control of the Participant.

          “ 401(k) Plan ” means the Brandywine Realty Trust 401(k) Profit Sharing Plan and any other qualified plan sponsored by the Company that includes a cash-or-deferred arrangement described in section 401(k) of the Code and in which a Participant in the Plan is eligible to participate.

ARTICLE 3

ADMINISTRATION OF THE PLAN AND DISCRETION

          3.1. The Committee, as Plan Administrator, shall have full power and authority to interpret the Plan, to prescribe, amend and rescind any rules, forms and procedures as it deems necessary or appropriate for the proper administration of the Plan and to make any other determinations and to take any other such actions as it deems necessary or advisable in carrying out its duties under the Plan. All action taken by the Plan Administrator arising out of, or in connection with, the administration of the Plan or any rules adopted thereunder, shall, in each case, lie within its sole discretion, and shall be final, conclusive and binding upon the Company, the Board, all Employees and Trustees, all Beneficiaries and all persons and entities having an interest therein. The Committee, may, however, delegate to any person or entity any of its powers or duties under the Plan. To the extent of any such delegation, the delegate shall become the Plan Administrator responsible for administration of the Plan, and references to the Plan Administrator shall apply instead to the delegate. Any action by the Committee assigning any of its responsibilities to specific persons who are all trustees, officers, or employees of the Company shall not constitute delegation of the Committee’s responsibility but rather shall be treated as the manner in which the Committee has determined internally to discharge such responsibility.

          3.2. The Plan Administrator shall serve without compensation for its services unless otherwise determined by the Board. All expenses of administering the Plan shall be paid by the Company.

          3.3. The Company shall indemnify and hold harmless the Plan Administrator from any and all claims, losses, damages, expenses (including counsel fees) and liability (including any amounts paid in settlement of any claim or any other matter with the consent of the Board) arising from any act or omission of such member, except when the same is due to gross negligence or willful misconduct.

          3.4. Any decisions, actions or interpretations to be made under the Plan by the Company, the Board or the Plan Administrator shall be made in its respective sole discretion, not as a fiduciary and need not be uniformly applied to similarly situated individuals and shall be final, binding and conclusive on all persons interested in the Plan.

ARTICLE 4

PARTICIPATION

          4.1. Election to Participate .

               (a)  Timing of Election to Participate . Any Eligible Employee or Trustee may enroll in the Plan effective as of the first day of a Plan Year by filing a completed and fully executed Enrollment Agreement with the Plan Administrator by a date set by the Plan Administrator.

                    (i)  Base Salary/Board Remuneration . With respect to the deferral of Compensation that is classified by the Company as base salary or the deferral of Board Remuneration, an executed Enrollment Agreement must be filed by December 31 of the Plan Year preceding the Plan Year in which such base salary or Board Remuneration is to be earned, or such earlier time as may be established by the Plan Administrator.

                    (ii)  Bonus .

                         (A) With respect to the deferral of Compensation that is classified by the Company as bonus, an executed Enrollment Agreement must be filed by December 31 of the Plan Year preceding the Plan Year in which such bonus is earned, or such earlier time as may be established by the Plan Administrator.

                         (B) The Board may, as a condition of a bonus award, require that it be deferred under the Plan and may prescribe vesting and investment provisions with respect to such award, and may establish separate deadlines by which Enrollment Agreements may be filed with respect to such an award.

                    (iii)  Performance-Based Compensation . With respect to the deferral of Performance-Based Compensation, an executed Enrollment Agreement must be filed no later than six months prior to the end of the Performance Period during which such Performance-Based Compensation is earned, subject to such other administrative rules, procedures and earlier deadlines as may be set by the Plan Administrator and communicated with reasonable advance notice to Eligible Employees.

                    (iv)  Share Awards . With respect to the deferral of a Share Award that does not qualify as Performance-Based Compensation, an executed Enrollment Agreement must be filed no later than 30 days following the date such Share Award is granted, and in no event later than twelve months before the first scheduled vesting date of such Share Award, subject to such other administrative rules, procedures and earlier deadlines as may be set by the Plan Administrator and communicated with reasonable advance notice to Eligible Employees.

                    (v)  Revocation of Election . Elections to defer Compensation, Performance-Based Compensation, Share Awards and Board Remuneration are irrevocable at the end of the election period established by the Plan Administrator, provided that, the Plan Administrator in its sole discretion, may accept revocations of elections up to December 31 of the calendar year in which the Participant files a deferral election.

               (b)  Amount of Deferral . Pursuant to said Enrollment Agreement, the Eligible Employee or Trustee shall irrevocably elect the percentages by which (as a result of payroll deduction) an amount equal to any whole percentage of the Participant’s Compensation, Performance-Based Compensation, Share Award or Board Remuneration will be deferred. Up to 85 percent (85%) of base salary, 100 percent (100%) of bonus, 100 percent (100%) of Performance-Based Compensation, 100 percent (100%) of a Share Award, and one hundred percent (100%) of Board Remuneration may be deferred; provided however, that deferrals will be made after required non-deferrable payroll tax deductions and any deductions elected by the Participant (including, but not limited to, deductions for payment of health insurance premiums). The Plan Administrator may establish minimum amounts that may be deferred under this Section 4.1 and may change such standards from time to time. Any such limit shall be communicated by the Plan Administrator to the Participants prior to the commencement of a Plan Year.

               (c)  Accounts to Which Amounts Credited . Pursuant to said Enrollment Agreement, the Eligible Employee shall elect the Distribution Option Accounts to which such amounts will be credited, and shall provide such other information as the Plan Administrator shall require. Board Remuneration will only be credited to the Deferred Board Remuneration Account.

               (d)  Form of Distribution from Accounts . The first Enrollment Agreement filed by an Eligible Employee must set forth the Participant’s election as to the time and manner of distribution from the In-Service Distribution Account and Flexible Distribution Account, as appropriate. The first Enrollment Agreement filed by an Eligible Employee must set forth the time and manner of distribution with respect to amounts credited to the Retirement Distribution Account. Subsequent Enrollment Agreements must also set forth the Participant’s election as to the time and form of distribution from each additional Flexible Distribution Account and In-Service Distribution Account first established pursuant to such Enrollment Agreement; provided, however, that no deferral election amounts will be creditable to the In-Service Distribution Account for amounts deferred on and after January 1, 2007. The first Enrollment Agreement filed by a Trustee must set forth the manner of distribution with respect to amounts credited to the Deferred Board Remuneration Account. Notwithstanding the foregoing, the manner of distribution for all amounts invested in the Employer Stock Fund as of April 1, 2007, and all amounts attributable to a deferral election effective on and after January 1, 2007 and invested in the Employer Stock Fund, shall be in the form of Shares (and cash for fractional Shares).

               (e)  Prior Plan Accounts . Notwithstanding anything herein to the contrary, the balance of each Prior Plan Sub-Account as of the Transfer Date shall include the portion of such Prior Plan Participant’s account under the Prior Plan that was rolled over into the Plan as of the Transfer Date. Amounts rolled over from the Prior Plan to the Plan shall be

deemed invested in the Earnings Crediting Option as determined by the Plan Administrator as the appropriate successor investment fund on the date those amounts are credited to the Prior Plan Sub-Account, based on the deemed investment of such amounts under the applicable Prior Plan immediately prior to the Transfer Date. Amounts in a Prior Plan Sub-Account shall be distributed to the Participant in accordance with the election or elections the Eligible Employee has made under the applicable Prior Plan with respect to such amounts.

          4.2. Special Rules for Filing of Elections .

               (a)  New Hires and Offerees . The Plan Administrator may, in its discretion, permit an Employee or Offeree who becomes an Eligible Employee to enroll in the Plan for the Plan Year in which the Employee or Offeree became an Eligible Employee, or a subsequent Plan Year, by filing a completed and fully executed Enrollment Agreement, in accordance with Section 4.1, prior to or as soon as practicable after the date the Employee or Offeree becomes an Eligible Employee but, in any event, not later than 30 days after such date. Notwithstanding the foregoing, however, any election by an Eligible Employee to defer Share Awards, Compensation and Performance-Based Compensation pursuant to this Section 4.2(a) shall apply only to Share Awards, Compensation and Performance-Based Compensation earned by or awarded to the Eligible Employee after the date on which such Enrollment Agreement is filed.

               (b)  Promotions . The Plan Administrator may, in its discretion, permit an Employee who first becomes an Eligible Employee after the beginning of a Plan Year due to a promotion, to enroll in the Plan for that Plan Year by filing a completed and fully executed Enrollment Agreement, in accordance with Section 4.1, as soon as practicable following the date the Employee becomes an Eligible Employee but, in any event, not later than 30 days after such date. Notwithstanding the foregoing, however, any election by an Eligible Employee to defer Share Awards, Compensation and Performance-Based Compensation pursuant to this Section 4.2(b) shall apply only to Share Awards, Compensation and Performance-Based Compensation earned by or awarded to the Eligible Employee after the date on which such Enrollment Agreement is filed.

               (c)  New Trustees . A Trustee whose election as a member of the Board first becomes effective in a Plan Year may enroll in the Plan for that Plan Year by filing a completed and fully executed Enrollment Agreement, in accordance with Section 4.1, as soon as practicable following the effective date of such Trustee’s election but, in any event, not later than 30 days after the effective date of such election. Notwithstanding the foregoing, however, any election by a Trustee to defer Board Remuneration pursuant to this Section 4.2 shall apply only to such Board Remuneration earned by the Trus