Dan Sennott is an attorney in Holland & Knight's Washington, D.C., office, where he is a member of the firm's National Security, Defense and Intelligence Team. Mr. Sennott has substantial experience with defense issues, having held senior leadership positions in both the U.S. military and the federal government, including most recently serving as the minority staff director for the House Armed Services Committee.

Mr. Sennott focuses his practice on representing clients in an array of public policy, government oversight and regulatory issues, particularly those related to the defense industry. He handles a variety of matters related to acquisition policy, emerging technology, satellite and space technology, and the Committee on Foreign Investment in the United States (CFIUS). In doing so, he regularly appears before the U.S. Department of Defense (DoD), each of the U.S. armed forces (Army, Marine Corps, Navy, Air Force, Space Force and Coast Guard), as well as the congressional defense committees.

Prior to joining Holland & Knight, Mr. Sennott served as the minority staff director for the U.S. House of Representatives Committee on Armed Services (HASC), where he was responsible for the development, negotiation and passage of the annual National Defense Authorization Act (NDAA) that authorizes the annual defense budget and establishes policy for the DoD. Prior to that position, he served as the minority general counsel for the committee, providing legal advice on all aspects of national security and congressional process. He began his time with the committee as a counsel and staff lead for the Military Personnel subcommittee, where he was responsible for a wide range of issues, including the Military Health System (MHS), military housing, education, and military pay and benefits.

Previously, Mr. Sennott served in the U.S. Army for more than two decades as an armor officer and a judge advocate. During his military career, Mr. Sennott served as a prosecutor, law professor, legislative liaison and the chief of military personnel law for the U.S. Army. He provided counsel on federal claims, government contracts, fiscal law, complex investigations and administrative law. His combat deployments included 14 months in Baghdad, Iraq, with the 1st Armored Division and 12 months in southern Afghanistan with the 82nd Airborne Division. His military decorations and awards include the Legion of Merit, the Bronze Star and the Meritorious Service Medal.


  • U.S. Army Command and General Staff College, MMAS, Homeland Security
  • The Army Judge Advocate General's Legal Center and School, LL.M., with honors
  • University of Illinois College of Law, J.D., magna cum laude
  • Marquette University, B.S., Industrial Engineering
Bar Admissions/Licenses
  • District of Columbia
  • Virginia
Court Admissions
  • U.S. Supreme Court
  • U.S. Army Court of Criminal Appeals
  • Standing Committee on Legal Assistance for Military Personnel, American Bar Association (ABA)
  • National Defense Industrial Association (NDIA), Board of Directors, 2023; Senior Fellow
  • University of Illinois Law Review, Editor-in-Chief, 2001-2002
Honors & Awards
  • Col. Paul W. Arcari Meritorious Service Award, Military Officer's Association of America (MOAA), 2019
  • Homeland Security Studies Award, U.S. Army Command and General Staff College, 2010
  • Distinguished Military Graduate, Marquette University, 1995


Speaking Engagements