Staff Sergeant is the sixth enlisted rank of the UNSC Marine Corps and the UNSC Army, and the fifth enlisted rank in the UNSC Air Force. It is a staff non-commissioned officer rank. The rank insignia is represented by four gold "chevrons" and four white "stripes" for the Air Force.
Staff Sergeants typically command squads of 9 - 11 Marines or Army Infantry, although they may be selected to become "Platoon Sergeants", which aid the platoon commander. Avery Johnson and Nolan Byrne were platoon leaders on Harvest, and were tasked with training a Colonial Militia, with each responsible for a platoon-sized group of men. Although a bit different from the other services, it is the Air Force's first non-commissioned officer rank as well as the first rank to which promotion is on a competitive basis.
|UNSC Defense Force enlisted ranks|
|E-1||E-2||E-3||E-4||E-5||E-6||E-7||E-8||E-9||Senior Enlisted Advisor|
|Air Force:||AB||Amn||A1C||SrA||SSgt||TSgt||MSgt||SMSgt||CMSgt - CCM||CMSAF|
|Army:||PV1||PV2||PFC||SPC - CPL||SGT||SSG||SFC||MSG - 1SG||SGM - CSM||SMA|
|Marine Corps:||Pvt||PFC||LCpl||Cpl||Sgt||SSgt||GySgt||MSgt - 1stSgt||MGySgt - SgtMaj||SgtMajMC|
|Navy:||CR||CA||CN||PO3||PO2||PO1||CPO||SCPO||MCPO - CMDCM - FORCM - FLTCM||MCPON|
Staff sergeant is a military rank, a traditional infantry or army enlisted grade held by a non-commissioned officer. In the UFP, this rank is equivalent to a petty officer (1st or 2nd class, depending on service).
|Enlisted personnel||Non-commissioned officers||Etc||Officers||Flag officers|
|WO||2nd Lt||1st Lt||Capt||Maj||LtCol||Col||BGen||MajGen||LtGen||Gen||GenCorps|
|Federation Starfighter Corps
(Star Trek: Remington)
|Starfleet Starfighter Corps
(Star Trek: Daedalus)