After 25 years of federal service in Congress and the executive branch, Dan founded Mathews Associates LLC in 2021 as a strategic consulting and business development firm. He helps his clients navigate the highest levels of Washington and the complex world of federal real estate and government procurements to expand their revenue, identify new partners and enter new markets. In 2024, President Biden appointed Mathews to the Public Buildings Reform Board, which is tasked with making recommendations to realign the federal real estate portfolio. He also serves on the Industry Advisory Group of the US State Department’s Bureau of Overseas Buildings Operations. In addition, Mathews is a board member of both the Federal Real Property Association and the National Federal Development Association. He has extensive experience with federal real estate issues and served as Commissioner of the US General Services Administration’s Public Buildings Service, where he led the 375 million square foot civilian real estate portfolio of the federal government, over 5,000 employees, and a $12 billion budget. Mathews graduated from Georgetown University with a degree in government and philosophy. He is married, has two daughters, and resides in Alexandria, Virginia.

Professional Expertise

Darian LeBlanc is an Executive Vice Chair at Cushman & Wakefield and one of the leading advisors in the United States for

large-scale government and institutional real estate transactions. Based in the Washington, DC region, he leads the firm’s

Government Services Group (GSG), a specialized team focused on securing and structuring federal, state, and municipal lease

transactions nationwide.

Over the course of his career, LeBlanc has completed more than 40 million square feet of leasing transactions with an

aggregate value exceeding $15 billion. He is widely recognized for navigating some of the most complex and high-profile

government requirements in the country, delivering solutions that align public-sector needs with private investment

objectives. In addition to his leasing practice, he is an integral member of Cushman & Wakefield’s Investment Sales platform,

advising on transactions involving government-leased assets.

LeBlanc is regarded as a key figure in the National Capital Region’s commercial real estate industry, particularly at the

intersection of federal transactions, economic development, and institutional investment. Drawing on 30+ years of experience

in both the public and private sectors, he advises clients on transaction strategy, portfolio optimization, and public-private

partnerships, and is known for bringing clarity and execution to highly complex assignments.

He has received numerous industry honors, including repeated recognition from CREBA, NAIOP, and national media outlets.

Professional Affiliations

• District of Columbia Building Industry Association (DCBIA)

• Commercial Real Estate Brokerage Association of Greater Washington, DC (CREBA)

• Maryland/DC National Association of Industrial and Office Properties (NAIOP)

• Northern Virginia National Association of Industrial and Office Properties

Major Transactions

Landlord/Owner Representation

• MetLife, Constitution Center, Washington, D.C. - Multiple agencies, 1.4M sf

• The JBG Companies, The Parklawn Building, Rockville, MD – U.S. Department of Health & Human Services, 935,386 sf

• Beacon Capital Partners, Polk & Taylor Buildings, Crystal City, VA – U.S. Department of Defense, 911,818 sf

• Stonebridge, Three and Four Constitution Square, Washington, DC – U.S. Department of Justice, 839,000 sf

• Boston Properties, Patriots Park, Reston, VA – Confidential Tenant, 706,482 sf

• Boston Properties, Springfield Metro Center, Springfield, VA – Transportation Security Administration, 625,000 sf

• Stonebridge, Two Constitution Square, Washington, DC – U.S. Department of Justice, 575,760 sf

• The World Bank Group, 600 19th Street, NW, Washington, DC –U.S. Department of State, 463,151 sf

• Related Companies, Carlyle Innovation Campus, Alexandria, VA – National Science Foundation, 400,000 sf

• Stonebridge, One Constitution Square, Washington, DC – U.S. General Services Administration Headquarters,

• 330,000 sf

• Principal Real Estate, 1200 1st Street, NE, Washington, D.C. – District of Columbia, 291,838 sf

• Paramount Group, 425 Eye Street, NW, Washington, DC – U.S. Department of Veterans Affairs, 285,561 sf