The Commandant and Sergeant Major of the Marine Corps
Learn about the highest-ranking officer and enlisted Marine in the Marine Corps.
Posted on 8/30/2025
The Commandant of the Marine Corps commands the United States Marine Corps and is the senior officer of the United States Marine Corps. The Commandant is not necessarily the highest-ranking officer in the Marine Corps, but holding the position of Commandant makes him senior to all other officers regardless of rank.
The Sergeant Major of the Marine Corps is selected by the Commandant of the Marine Corps and serves as the senior enlisted advisor to the Commandant. The Sergeant Major of the Marine Corps is revered as the most outstanding, unparalleled enlisted Marine.
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