Joseph A. Hennessey

Of Counsel

Joseph A. Hennessey has more than two decades of extensive national and international complex business litigation experience. Prior to beginning his private practice of law, Mr. Hennessey clerked in the District of Columbia Court of Appeals for the Honorable John A. Terry. In private practice, Mr. Hennessey has litigated a variety of intellectual property, telecommunications, licensing, and breach of contract issues including DRAM patent, trademark, Ka- and Ku-band FCC satellite licensing, VoIP/PTT switching, tactical radar installation, and radio content and ownership disputes. Mr. Hennessey’s international practice includes cases arising from Afghanistan, Kuwait, The United Kingdom, Ukraine, and Yemen. He has broad private dispute resolution experience having engaged in arbitration before the International Chamber of Commerce’s International Court of Arbitration, the American Arbitration Association’s International Centre for Dispute Resolution, and the World Bank’s International Centre for the Settlement of Investment Disputes.

Mr. Hennessey’s court admissions include the United States District Court for the District of Columbia, the United States District Court for Maryland, the United States Court of Appeals for the District of Columbia Circuit, the United States Court of Appeals for the Federal Circuit, United States Court of Appeals for the Fourth Circuit, United States Court of Appeals for the Sixth Circuit, United States Court of Appeals for the Ninth Circuit, and the Maryland Court of Appeals. Mr. Hennessey has been an active member of the District of Columbia Bar, Maryland State Bar Association, Bar Association for Montgomery County (MD), American Bar Association, and American Association for Justice with service as the Chair of the Tortious Interference Subcommittee of the ABA’s Committee on Business Torts and an active participant in the ABA Standing Committee on National Security Law.


  • B.A., History and Philosophy, Tufts University, 1989 magna cum laude
  • M.A., Liberal Arts (“The Great Books of Western Civilization”), 1993
  • J.D., Catholic University, 1995 cum laude


  • Maryland
  • District of Columbia

Contact Info:

v: 301 365 9040

f: 301 365 9101