What is an E-7 in the Army?

E-7 Rank Explanation

An E-7 in the Army refers to several non-commissioned officer ranks, which include the Sergeant First Class (SFC), as well as equivalent ranks in other branches such as Gunnery Sergeant (GySgt) in the Marine Corps, Chief Petty Officer (CPO) in the Navy, and Master Sergeant (MSgt) in the Air Force.