Enlisted Marine Corps MOS | Personnel, Intelligence, Infantry

When enlisting in the Marine Corps, you will have the opportunity to apply for your choice of an MOS, which stands for Military Occupation Specialty. You may not get the MOS you choose and you may not be eligible for a few of them, but the Corps does generally speaking attempt to get you into the MOS that you want to be in. During their military careers, many Marines have more than one MOS. MOS’s are identified by a four digit code. The first two digits designate a specific occupation field (OccFlds) and the last two digits identify specific jobs.


01 Personnel & Administration

The personnel & administration Marine Occupational Field involves administrative and clerical duties. This includes postal service. To qualify, you must be qualified in basic clerical skills including typing and communications. Often, these jobs involve record keeping and filing jobs management. Recruits entering this field will receive basic administration Marine training before going on to a more specialized billet.

0100 Basic Administrative Marine: GySgt – Pvt

0121 Personnel Clerks: Sgt-Pvt

Job Description: Personnel clerks are responsible for personnel and general administrative duties. This job includes using information systems to prepare and maintain documents and records and audit pay and personnel information.

Job Requirements: GT Score of at least 100, completion of Personnel Clerk Course or demonstration of satisfactory performance on VIOJT, must be able to type minimum of 25wpm.

0111 Administrative Specialist

Pvt to MGySgt (Private to Master Gunnery Sergeant)

In June 2010, MOS 0121, 0151 AND 0193 merged into the new MOS 0111. MOS 0121 was the “Personnel Clerk”. MOS 0151 was the “Administrative Clerk” and MOS 0193 was the “Personnel/Administrative Chief.”

MOS 0149 – Substance Abuse Control Specialist: MGySgt – SSgt

Master Gunnery Sergeant to Staff Sergeant

In the USMC, MOS 0149 are the substance abuse control specialists. They run substance abuse education & prevention programs, perform urinalysis screening and other substance abuse related matters.

MOS 0149 Requirements: You should have 6 months experience in a full-time or additional duty substance abuse prevention billet. You’ll need to complete the Unit Substance Abuse Program Management Course.

MOS 0160 – Postal Officer: CWO-WO

Chief Warrant Officer – Warrant Officer

Postal officers manage the postal operations at various installations and commands. They make sure that the Official Mail Cost Control Program (OMCCP) works. One of the responsibilities is to represent the commanding officer to the other services, tenant activities, the DOD, and the US Postal Service.

MOS 0160 Requirements: Must have security clearance, experience as a postal clerk (MOS 0161) and have a clean record. You must complete the Postal Operation and Supervisors courses at Fort Jackson, SC.

MOS 0170 – Personnel Officer: CWO5-WO

Chief Warrant Officer 5 – Warrant Officer

Personnel Officers supervise and manage an admin office’s personnel matters functioning as a supervisor, Coordinator and administrator of manpower, personnel and pay info. Personnel Officers are responsible for being knowledgeable on the specific job duties of MOS’s 0121, 0151, 0171 and 0193. If you Choose this MOS, you will advise on matters related to personal affairs, benefits and privileges.

MOS 0170 Requirements: Must Complete the Advanced Personnel Administration Course (APAC) Conducted at Camp Lejeune, NC -OR- have 3 years of experience in a personnel admin center with the rank of sergeant or higher.

MOS 0171 – Manpower Information Systems (MIS) Analyst

Master Gunnery Sergeant to Corporal | MGySgt – Cpl

Manpower information system analysts manage a region’s fielded Manpower Information Systems. Marines in MOS 0171 performs management for the Marines Corps Total Force System (MCTFS). They help manage records and reports within the MCTFS, the Diary/Marine Integrated Personnel System (UD/MIPS), the On-line Diary System (OLDS), SABRS Manpower Analytical Retrieval Tool System (SMARTS), and other automated manpower information systems.

The MCTFS manages personnel and pay data.

Requirements for MOS 0171: You must a year of OJT in a Manpower Information System Support Office (MISSO) with approval of the officer in Charge of the MISSO and CMC (MIO).

Visit MISSA/MISSO online.

MOS 0180 – Adjutant: LtCol to 2ndLt

Lieutenant Colonel to 2nd Lieutenant

A USMC adjutant Coordinates administrative matters of internal staff sections and external agencies at the staff level. They supervise policies, receive and route correspondence, handle and protect Classified materials, prepare responses for special Correspondence and additional responsibilities. Marine adjutant’s are often responsible for Casualty reporting, awards and decorations, fitness reports, legal matters and postal responsibilities.

MOS 0180 Requirements: Must Complete the Adjutant Course at Camp Lejeune, NC.


03 Infantry

0300 Basic Infantryman – SGT-PVT

0311 Rifleman – SGT-PVT

0312 Riverine Assault Craft Crewman

0313 LAV Crewman – SGT-PVT

0314 Rigid Raiding Craft (RRC) Rigid Hull Inflatable Boat (RHIB) Coxswain (FMOS)

0316 Combat Rubber Reconnaissance Craft Coxswain (NMOS)

0317 Scout Sniper – GYSGT-LCPL1 [formerly 8541]

0321 Reconnaissance Man – MGYSGT-PVT

0323 Reconnaissance Man, Parachute Qualified (NMOS) [formerly 8652]

0324 Reconnaissance Man, Combatant Diver Qualified (NMOS) [formerly 8653]

0326 Reconnaissance Man, Parachute and Combatant Diver Qualified (NMOS) [formerly 8654]

0331 Machine Gunner – SGT-PVT

0341 Mortarman – SGT-PVT

0351 Infantry Assaultman – SGT-PVT

0352 Anti-tank Missileman – SGT-PVT

0369 Infantry Unit Leader – MGYSGT-SSGT

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