<P> Staff sergeants, as are all Marine Corps SNCOs, addressed and referred to by their complete rank title (i.e. "Staff Sergeant Jones" or simply "Staff Sergeant," with the abbreviation "SSgt"). </P> <P> The rank of Staff Sergeant in the USMC was created in 1923 to coincide with the U.S. Army's ranks . Until the end of WW2, the insignia of platoon sergeant was three chevrons and a rocker, with Staff Sergeant having a horizontal stripe instead of a rocker below the chevrons . After the separate rank of Platoon Sergeant was eliminated, the Staff Sergeant rank switched over to the rocker insignia and Staff Sergeants held the platoon sergeant's billet . </P> <P> Staff sergeant (SSgt) is E-5 in the U.S. Air Force . It ranks above senior airman and below technical sergeant . It is the Air Force's first non-commissioned officer rank, as well as the first Air Force rank to which promotion is attained on a competitive basis . Sergeants, also known in Air Force jargon as "buck sergeant"', no longer exist, having been eliminated in the 1990s after sharing the same pay grade with that of the rank of senior airman (E-4). Staff sergeants are expected to be technically proficient and function as first - line supervisors within a' work center' . After being selected for promotion, senior airmen must attend Airman Leadership School, which teaches them basic leadership skills and how to write performance reports to become staff sergeant . The term of address is "Staff Sergeant" or "Sergeant". High year of tenure was reduced from 20 to 15 years in 2013 . </P> <Table> <Tr> <Th_colspan="11"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> United States enlisted ranks </Th> </Tr> <Tr> <Th> Pay grade → Branch of service ↓ </Th> <Th> E-1 </Th> <Th> E-2 </Th> <Th> E-3 </Th> <Th> E-4 </Th> <Th> E-5 </Th> <Th> E-6 </Th> <Th> E-7 </Th> <Th> E-8 </Th> <Th> E-9 </Th> </Tr> <Tr> <Td> Army </Td> <Td> PVT </Td> <Td> PV2 </Td> <Td> PFC </Td> <Td> SPC--CPL </Td> <Td> SGT </Td> <Td> SSG </Td> <Td> SFC </Td> <Td> MSG--1SG </Td> <Td> SGM--CSM--SMA </Td> </Tr> <Tr> <Td> Marine Corps </Td> <Td> Pvt </Td> <Td> PFC </Td> <Td> LCpl </Td> <Td> Cpl </Td> <Td> Sgt </Td> <Td> SSgt </Td> <Td> GySgt </Td> <Td> MSgt--1stSgt </Td> <Td> MGySgt--SgtMaj--SgtMajMarCor </Td> </Tr> <Tr> <Td> Navy </Td> <Td> SR </Td> <Td> SA </Td> <Td> SN </Td> <Td> PO3 </Td> <Td> PO2 </Td> <Td> PO1 </Td> <Td> CPO </Td> <Td> SCPO--CMDCS </Td> <Td> MCPO--CMDCM--FORCM, FLTCM--MCPON </Td> </Tr> <Tr> <Td> Air Force </Td> <Td> AB </Td> <Td> Amn </Td> <Td> A1C </Td> <Td> SrA </Td> <Td> SSgt </Td> <Td> TSgt </Td> <Td> MSgt--1st Sgt </Td> <Td> SMSgt--1st Sgt </Td> <Td> CMSgt--1st Sgt--CCM--CMSAF </Td> </Tr> <Tr> <Td> Coast Guard </Td> <Td> SR </Td> <Td> SA </Td> <Td> SN </Td> <Td> PO3 </Td> <Td> PO2 </Td> <Td> PO1 </Td> <Td> CPO </Td> <Td> SCPO </Td> <Td> MCPO, CGRF - MC--CMC--Area CMC--MCPOCG </Td> </Tr> </Table>

Duties of a staff sergeant in the air force
find me the text answering this question