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Defense Secretary Jim Mattis at a meeting with other leaders

Defense Leaders

Secretary of Defense

Photo of Secretary of Defense Jim Mattis

Jim Mattis

The Secretary of Defense is the principal defense policy adviser to the President and is responsible for the formulation of general defense policy and policy related to all matters of direct concern to the Department of Defense, and for the execution of approved policy. Under the direction of the President, the Secretary exercises authority, direction and control over the Department of Defense. The Secretary of Defense is a member of the President's Cabinet and of the National Security Council. Biography

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Deputy Secretary of Defense

Photo of Bob Work

Bob Work

The Deputy Secretary of Defense is delegated full power and authority to act for the Secretary of Defense and exercise the powers of the Secretary on any and all matters for which the Secretary is authorized to act pursuant to law. Biography

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Chairman of the Joint Chiefs of Staff

Photo of Marine Corps Gen. Joe Dunford

Marine Corps Gen. Joe Dunford

The Chairman of the Joint Chiefs of Staff is the nation’s highest-ranking military officer and the principal military advisor to the President, Secretary of Defense, and National Security Council. Biography

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Vice Chairman of the Joint Chiefs of Staff

Photo of Air Force Gen. Paul J. Selva

Air Force Gen. Paul J. Selva

The Vice Chairman of the Joint Chiefs of Staff is the Nation’s second highest-ranking military officer. Biography

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