<Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <P> Enlisted Marines with paygrades of E-4 and E-5 are non-commissioned officers (NCOs) while those at E-6 and higher are Staff Noncommissioned Officers (SNCOs). The E-8 and E-9 levels each have two ranks per pay grade, each with different responsibilities . Gunnery Sergeants (E-7) indicate on their annual evaluations (called "fitness reports") their preferred promotional track: Master Sergeant or First Sergeant . The First Sergeant and Sergeant Major ranks are command - oriented Senior Enlisted Advisors, with Marines of these ranks serving as the senior enlisted Marines in a unit, charged to assist the commanding officer in matters of discipline, administration, and the morale and welfare of the unit . Master Sergeants and Master Gunnery Sergeants provide technical leadership as occupational specialists in their specific MOS . First Sergeants typically serve as the senior enlisted Marine in a company, battery, or other unit at similar echelon, while Sergeants Major serve the same role in battalions, squadrons, or larger units . </P> <P> The Sergeant Major of the Marine Corps is a billet and with it carries a special rank insignia, conferred on the senior enlisted Marine of the entire Marine Corps, personally selected by the Commandant of the Marine Corps . It and the Marine Gunner are the only billets which rate modified rank insignia in place of the traditional rank insignia . </P> <Table> <Tr> <Th> Enlisted </Th> <Th_colspan="3"> Junior enlisted </Th> <Th_colspan="2"> Non-commissioned officers (NCOs) </Th> <Th_colspan="7"> Staff non-commissioned officers (SNCOs) </Th> </Tr> <Tr> <Th> Title (Abbreviation) </Th> <Th> Private (Pvt) </Th> <Th> Private first class (PFC) </Th> <Th> Lance corporal (LCpl) </Th> <Th> Corporal (Cpl) </Th> <Th> Sergeant (Sgt) </Th> <Th> Staff sergeant (SSgt) </Th> <Th> Gunnery sergeant (GySgt) </Th> <Th> Master sergeant (MSgt) </Th> <Th> First sergeant (1stSgt) </Th> <Th> Master gunnery sergeant (MGySgt) </Th> <Th> Sergeant major (SgtMaj) </Th> <Th> Sergeant Major of the Marine Corps (SMMC) </Th> </Tr> <Tr> <Th> US DoD Pay Grade </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_colspan="2"> E-8 </Th> <Th_colspan="3"> E-9 </Th> </Tr> <Tr> <Th> NATO Code </Th> <Th> OR - 1 </Th> <Th> OR - 2 </Th> <Th> OR - 3 </Th> <Th> OR - 4 </Th> <Th> OR - 5 </Th> <Th> OR - 6 </Th> <Th> OR - 7 </Th> <Th_colspan="2"> OR - 8 </Th> <Th_colspan="3"> OR - 9 </Th> </Tr> <Tr> <Th> Insignia </Th> <Td> no insignia </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table>

What is the highest enlisted rank in the marines