<P> Staff sergeant insignia U.S. Marine Corps </P> <P> Staff sergeant insignia U.S. Air Force </P> <P> Staff sergeant (SSG) is E-6 rank in the U.S. Army, just above sergeant and below sergeant first class, and is a non-commissioned officer . Staff sergeants are generally placed in charge of squads, but can also act as platoon sergeants in the absence of a sergeant first class . In support units, staff sergeants ordinarily hold headquarters positions because of the number of slots available for them in these units . Staff sergeants are typically assigned as a squad leader or company operations non-commissioned officer in charge at the company level, but may also hold other positions depending on the type of unit . Staff sergeants are referred to as "Sergeant" except in certain training environments and schools . The NATO code is OR - 6 . </P> <P> The rank of staff sergeant in the U.S. Army, along with technical sergeant (renamed sergeant first class in 1948) and master sergeant, was created by Congress after the First World War . In 1920 the Army combined several company / battery / troop level "staff" NCO ranks, including color sergeant, supply sergeant, radio sergeant, eleven grades of sergeant first class, three grades of sergeant, two grades of master gunner, and assistant band leader into the new rank of staff sergeant . Staff sergeant, as did the ranks it combined / replaced, then ranked above sergeant but below first sergeant . At that time, sergeants served as section leaders, platoon guides, and assistants to platoon commanders (the position of platoon sergeant, nor a separate rank for the position, did not yet exist), and included several formerly separate ranks such as mess sergeant, company supply sergeant, and stable sergeant, etc . In 1940, staff sergeant became the rank title of rifle platoon sergeants and in 1942 rifle squad leaders became staff sergeants, with platoon sergeants then being promoted to technical sergeants . (Perrenot, 2009) </P>

What rank is a staff sergeant in the marines