Dr. Mark A. Livingston was named the Assistant Director, Personnel Security, of the Defense Counterintelligence and Security Agency (DCSA), effective July 3, 2022.

In this capacity, Dr. Livingston oversees the sustainment, transformation, and integration of DoD Personnel Security and Suitability and Credentialing program within DCSA, dedicated to ensuring a trusted workforce for both the Department and the rest of the federal government.

Prior to joining DCSA, Dr. Livingston served concurrently as the as the Deputy Under Secretary of the Navy, Intelligence Security & Insider Threat and the Assistant Deputy Chief of Naval Operations for Manpower, Personnel, Training, and Education. In these roles, he led the Department of the Navy’s National Security Enterprise.

Dr. Livingston has over 41 years of government service including 21 years as a United States Marine. In 2017, he served as the Senior Director of Security & Intelligence, Deputy Under Secretary of the Navy (Policy), where he was responsible for developing and issuing effective security & intelligence, and insider threat policy. He served as the principal advisor to the Deputy Under Secretary (Policy), Under Secretary of the Navy and Secretary of the Navy on all matters relating to personnel background investigations and personnel security for both the US Navy and US Marine Corps.

In 2013, he became the Deputy Assistant Administrator, Office of Intelligence & Analysis (OIA) for the Transportation Security Agency, Department of Homeland Security, where he served as the TSA Chief Risk analytical leader, providing leadership, vision, and direction for risk management activities across TSA by leading long-range strategic risk planning and risk management efforts. Prior to that, he served as a senior security and intelligence expert for the Office of Naval Intelligence, where he championed efforts to collaborate across the Intelligence Community on issues of national maritime importance to include piracy, counterterrorism, counter proliferation, and counter narcotics.

Dr. Livingston’s past work also includes Federal Law Enforcement service as a Supervisory Special Agent, Pentagon Force Protection Agency, Senior Nuclear Reactor Specialist at the U.S. Nuclear Regulatory Commission, and Director of Corporate Intelligence Programs, Northrop Grumman Corporation. He is a combat veteran and served in Iraq.

He is a graduate of University of Maryland, University College, where he earned a Bachelor of Science in Psychology, a Master’s in Human Resource Management, a Master’s in Business Administration, and a Doctorate in Management. He is a graduate of the Federal Executive Institute’s Leadership for a Democratic Society, and a graduate of the Office of Naval Intelligence Senior Executive Development Program and several senior SES leadership courses. Dr. Livingston has received various awards throughout his career, all of which reflect the leadership opportunities he has had to be part of amazing teams of service members, civilians and contractors.