Sergeant first class ( SFC ) is the seventh enlisted rank ( E-7 ) in the U.S. Army , ranking above staff sergeant ( E-6 ) and below master sergeant and first sergeant ( E-8 ) , and is the first non-commissioned officer rank designated as a senior non-commissioned officer ( SNCO ) .
Sergeant First Class ( SFC ) is the seventh enlisted rank ( E-7 ) in the U.S. Army .