Staff Sergeant
From Starbase 900 Wiki
Staff Sergeant is E-6 rank in the Starfleet Marine Corps, just above Sergeant and below Gunnery Sergeant. A Marine Staff Sergeant is a staff non-commissioned officer rank. This grade is normally achieved after 10 to 13 years in service. A staff sergeant usually is billeted as a platoon sergeant for 30+ Marines and may also be tasked as a company gunnery sergeant, or a platoon commander if required. They are the senior tactical advisor to a platoon commander by virtue of time in service, previous deployments, and experience and is responsible for the proficiency, training and administrative issue of his Marines. They are referred to by their complete rank (i.e. "Staff Sergeant Jones" or simply "Staff Sergeant," with the abbreviation "SSgt"). Staff Sergeant is equivalent to Petty Officer First Class.