| Rank Insignia | Grade | Starfleet Rank | Marine Corps Rank |
 | A-5 | Fleet Admiral (FAdm) | |
 | A-4 | Admiral (Adm) | General (Gen) |
 | A-3 | Vice Admiral (VAdm) | Major General (MGen) |
 | A-2 | Rear Admiral (RAdm) | Lieutenant General (LGen) |
 | A-1 | Commodore (Comm) | Brigadier General (BGen) |
 | O-6 | Captain (Capt) | Colonel (Col) |
 | O-5 | Commander (Cmdr) | Lieutenant Colonel (LtCol) |
 | O-4 | Lieutenant Commander (LtCmdr) | Major (Maj) |
 | O-3 | Lieutenant (Lt) | Lieutenant Major (LtMaj) |
 | O-2 | Lieutenant Junior Grade (LtJG) | First Lieutenant (1Lt) |
 | O-1 | Ensign (Ens) | Second Lieutenant (2Lt) |
 | E-9 | Master Chief Petty Officer (MCPO) | Sergeant Major (SgtMaj) |
 | E-8 | Senior Chief Petty Officer (SCPO) | Master Sergeant (MSgt) |
 | E-7 | Chief Petty Officer (CPO) | Gunnery Sergeant (GSgt) |
 | E-6 | Petty Officer First Class (PO-1) | Staff Sergeant (SSgt) |
 | E-5 | Petty Officer Second Class (PO-2) | Sergeant (Sgt) |
 | E-4 | Petty Officer Third Class (PO-3) | Corporal (Cpl) |
 | E-3 | Crewman (Cmn) | Lance Corporal (LCpl) |
 | E-2 | Crewman Apprentice (CmnA) | Private First Class (PFC) |
 | E-1 | Crewman Recruit (CmnR) | Private (Pvt) |
 | C-4 | Cadet Fourth Class (Cdt-4) | |
 | C-3 | Cadet Third Class (Cdt-3) | |
 | C-2 | Cadet Second Class (Cdt-2) | |
 | C-1 | Cadet First Class (Cdt-1) |
ESF StarFleet Engineering Page
Created for ESF by C.A. Jencks, Feb 21, 1997.