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Current responsibilities
Joseph B. Brennan is a Corporate Regional Director of JLL. Joe serves as the Managing Director of the firm’s national Government Investor Services (GIS) practice, headquartered in Washington, DC. 

The JLL GIS practice is the largest of its kind and has successfully completed over 4,000 individual transactions for government agencies and private sector owners of real estate.

Joe provides leadership to the GIS team in the areas of strategy and transaction implementation to investors in the federal sector.

The process, politics and strategy associated with federal real estate present complex challenges for investors, and his team is uniquely skilled to successfully advise Jll's clients in the federal real estate arena. 

Leasing, Investment Sales, Financing, and Build-to-suits in the Government Sector

Years of experience
20+ years


  • Senior Vice President of Brokerage, Spaulding and Slye, Washington, DC
  • Staff Assistant to the President, Office of Presidential Advance, The White House, Washington, DC

Key transactions

  • United States Department of Defense, The Pentagon:  Developed and implemented an immediate 1,000,000 square foot relocation of Pentagon employees immediately following the September 11th terrorist attacks.
  • The United States Department of State: Development and implemented numerous significant transactions with the United States department of State, with various institutional owners.
  • The United States Army:  Advised the United States Army Corps of Engineers in the implementation of the Enhanced Use Lease (EUL) program on a national basis.
  • United States General Services Administration:  Developed and implemented a dual award of leases in Arlington, VA on behalf of the United States Department of Defense and the United States Department of State.
  • National Transportation Safety Board NTSB: developed and implemented an award of the headquarters lease and conference facility in Washington, DC.
  • United States Transportation Security Administration TSA: Engineered the lease award for the TSA headquarters facility in Arlington, Virginia.

Loyola College, Bachelor of Business Administration, Baltimore, MD


  • The Association of Defense Communities (ADC) – Member
  • The City of Alexandria, Mayors BRAC Advisory Board – Board Member
  • The Eisenhower Partnership – Board Member
  • The Federal Real Property Association (FRPA) – Member
  • National Association of Industrial and Office Properties (NAIOP) – Member
  • Urban Land Institute (ULI) – Member
  • Georgetown University, Kennedy School of Ethics- Sponsor of the annual “Brennan Lecture” focusing on business ethics