Master Sergeant

Master Sergeant is the eighth enlisted rank in the Starfleet Marine Corps, just above Gunnery Sergeant and below Sergeant Major. It is abbreviated as MSgt. Master Sergeants are responsible for the morale, welfare, and conduct of all the enlisted members in a company and is the chief advisor to the company commander concerning the enlisted force. Most units have a Master Sergeant in this position, while larger units use Sergeant Majors.