Professional information about senior Defense Department officials.

Sandra H. Magnus, Ph.D

Deputy Director for Engineering within the Office of the Under Secretary of Defense for Research and Engineering

Christopher P. Maier

Director, Defeat-ISIS Task Force Office of the Secretary of Defense

Paul Martin

Acting Deputy Assistant Secretary of Defense for Plans

Derek (Dirk) Maurer

Deputy Assistant Secretary of Defense for Countering Weapons of Mass Destruction

Thomas McCaffery

Assistant Secretary of Defense for Health Affairs

Ryan D. McCarthy

Under Secretary of the United States Army
Command Sergeant Major

Patrick L. McCauley

Command Senior Enlisted Leader (USSOCOM)

Elaine McCusker

Deputy Under Secretary of Defense (Comptroller)

Kelly K. McKeague

Director, Defense POW/MIA Accounting Agency
Chief Master Sergeant

Patrick F. McMahon

Command Senior Enlisted Leader (USSTRATCOM)

Victorino G. Mercado

Performing the Duties of Assistant Secretary of Defense for Strategy, Plans, and Capabilities

Thomas P. Michelli

Acting Deputy Chief Information Officer for Cybersecurity

Mary J. Miller

Principal Deputy, Director of Defense Research and Engineering for Research and Technology

Essye B. Miller

Principal Deputy, Department of Defense Chief Information Officer

Mark A. Milley

Chairman of the Joint Chiefs of Staff

Amy K. Mitchell

Special Assistant to the Secretary of Defense for Protocol