US Army Chief of Staff

Chief of Staff of the United States Army CSA
Flag of the Chief of Staff of the Army
Incumbent General Mark A. Milley since August 14, 2015
Department of the Army The Army Staff
Member of	Joint Chiefs of Staff
Reports to	Secretary of Defense Secretary of the Army
Seat	The Pentagon, Arlington County, Virginia, U.S.
Appointer	The President with Senate advice and consent
Term length	4 years Renewable
Constituting instrument	10 U.S.C. § 3033
Precursor	Commanding General of the Army
Formation	August 15, 1903
First holder	LTG Samuel B. M. Young
Deputy	Vice Chief of Staff of the Army
Website	Official Website

The Chief of Staff of the Army (CSA) is a statutory office (10 U.S.C. § 3033) held by a four-star general in the United States Army. As the most senior uniformed officer assigned to serve in the Department of the Army, the CSA is the principal military advisor and a deputy to the Secretary of the Army. In a separate capacity, the CSA is a member of the Joint Chiefs of Staff (10 U.S.C. § 151) and, thereby, a military advisor to the National Security Council, the Secretary of Defense, and the President of the United States. The CSA is typically the highest-ranking officer on active-duty in the U.S. Army unless the Chairman and/or the Vice Chairman of the Joint Chiefs of Staff are Army officers.

The Chief of Staff of the Army is an administrative position based in the Pentagon. While the CSA does not have operational command authority over Army forces proper (which is within the purview of the Combatant Commanders who report to the Secretary of Defense), the CSA does exercise supervision of army units and organizations as the designee of the Secretary of the Army.