Assistant Secretary of Defense (PTDO)
Health Affairs
Ms. Seileen Mullen is currently serving as the Acting Assistant Secretary of Defense for
Health Affairs. In this role, she is the principal advisor to the Secretary of Defense and the Undersecretary of
Defense for Personnel and Readiness for all Department of Defense health and force health protection policies,
programs, and activities.
Mullen has spent nearly 30 years in or around military health. Prior to being named the
Acting Assistant Secretary of Defense for Health Affairs in 2022, she served as the Chief Operating Officer of
Martin, Blanck & Associates, a health care policy firm, with a focus in military health. She became Chief
Operating Officer in January 2007, and was responsible for day-to-day operations, including management of client
relations, and internal communications and external partnerships. At Martin, Blanck & Associates, she worked
extensively military health issues, including on matters relating to both the Direct Care Direct care refers to
military hospitals and clinics, also known as “military treatment facilities” and
“MTFs.”direct care and Purchased Care The TRICARE Health Program is often referred to as purchased care.
It is the services we “purchase” through the managed care support contracts purchased care systems.
Mullen graduated with a Bachelor of Arts from the University of Virginia in 1984. From 1985
to 1993, she served in the House of Representatives in a variety of roles. She spent three years as a professional
staff member on the House Armed Services Committee.
In February 1993, she joined the Department of Defense. From 1994 to 1996, she served as
the Special Assistant and Executive Officer to the Assistant Secretary of Defense for Health Affairs, where she
provided advice and counsel to the Assistant Secretary of Defense for Health Affairs on health care and operational
policy matters. In this role, she also contributed to the publication of the Final Report of the White House Task
Force on Persian Gulf War.
From 1996 to 1998, Mullen was the Director of the Department of Defense’s TRICARE
Management Activity’s Aurora Field Office. In this role as the Head of Contracting Activity (HCA), she managed
TRICARE’s contracting activities, as well as approximately 350 personnel in TRICARE’s Colorado and
Washington, D.C. contracting offices.
From 1999 to 2001, Mullen served as the Director of Federal Government Relations for the
Salt Lake Organizing Committee for the Olympic Winter Games of 2002. She worked daily with the White House Task
Force for the Olympics in securing appropriations for the 2002 Olympic Games and all aspects of government relations
at the federal and state level. From 2001 to 2004, she provided program consulting services to the TRICARE
Management Activity (TMA) in support of the TRICARE Next Generation (T-Nex) contracts for managed care services,
which represented $32 billion in federal healthcare contracting.
She served as a member of the Virginia Medical Reserve Corps during the COVID-19 pandemic.
She is a recipient of the Department of Defense Outstanding Public Service Award.