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Robert G. Salesses is Deputy Director of Washington Headquarters Services in the U.S. Department of Defense, who served as Acting Secretary of Defense in the Trump Administration from January 20, 2025 to January 25, 2025. [1] He was formerly a U.S. Marine Corps officer and has served in multiple positions in the Department of Defense.
The secretary is one of only five or six civilians – the others being the president, the three "service secretaries" (the secretary of the Army, secretary of the Navy, and secretary of the Air Force), and the secretary of homeland security (when the United States Coast Guard is under the United States Department of Homeland Security and has ...
It is headed by the Secretary of Defense. The department was established in 1947 and is divided into three major Departments—the Department of the Army , Navy and Air Force , as well as a number of other component organizations.
For example, Deputy Secretary John Hamre led the Defense Department’s Y2K project, which was meant to ensure that Pentagon activities would not be disrupted by potential errors in computer ...
The Office of the Secretary of Defense (OSD) is a headquarters-level staff of the United States Department of Defense.It is the principal civilian staff element of the U.S. Secretary of Defense, and it assists the Secretary in carrying out authority, direction and control of the Department of Defense in the exercise of policy development, planning, resource management, fiscal, and program ...
Michael Bruce Donley (born October 4, 1952) is a United States government official who is the director of administration and management in the Office of the Secretary of Defense since May 2021, having served in the same position from 2005 to 2008.
After working on the 2008 Obama campaign and transition team, Wagner was appointed to a position in the Office of the Secretary of Defense during the Obama Administration, working on nuclear weapons policy and later detainee and international humanitarian law policy. [2]
The chain of command leads from the president (as commander-in-chief) through the secretary of defense down to the newest recruits. [2] [3] The United States Armed Forces are organized through the United States Department of Defense, which oversees a complex structure of joint command and control functions with many units reporting to various commanding officers.