Under Secretary of Defense for Policy

Under Secretary of Defense for Policy
Seal of the Department of Defense
Flag of an Under Secretary of Defense
Incumbent Amanda J. Dory Acting since 26 April 2024
United States Department of Defense Office of the Secretary of Defense
Style	Madam Under Secretary
Reports to	Secretary of Defense Deputy Secretary of Defense
Appointer	The President with Senate advice and consent
Term length	No fixed term
Formation	1978
First holder	Stanley Rogers Resor
Succession	5th in SecDef succession
Deputy	Principal Deputy Under Secretary of Defense for Policy
Salary	Executive Schedule, level III
Website	policy.defense.gov

The United States under secretary of defense for policy (USDP) is a high level civilian official in the United States Department of Defense. The under secretary of defense for policy is the principal staff assistant and adviser to both the secretary of defense and the deputy secretary of defense for all matters concerning the formation of national security and defense policy.

The under secretary is normally appointed from civilian life by the president with the advice and consent of the Senate. The incumbent, performing the duties of the under secretary, is Amanda J. Dory, who took office upon the resignation of acting under secretary Sasha Baker.