High Quality Content by WIKIPEDIA articles! Sergeants major is a senior non-commissioned rank or appointment in many militaries around the world. In Commonwealth countries, Sergeants Major are usually appointments held by senior non-commissioned officers or warrant officers. In the United States, there are various degrees of sergeant major (Command Sergeant Major (CSM), Sergeant Major of the Army (SMA), Sergeant Major of Marine Corps), but they are all of the same pay grade.