The United States Marine Corps Military Occupational Specialty (MOS) is a system of categorizing career fields. All enlisted and officer Marines are assigned a four-digit code denoting their primary occupational field and specialty. Additional MOSs may be assigned through a combination of training and/or experience, which may or may not include completion of a formal school and assignment of a formal school code. Occupational Fields (OccFlds) are identified in the first two digits and represents a grouping of related MOSs. Job codes are identified in the last two digits and represent a specific job within that OccFld. The USMC now publishes an annual Navy/Marine Corps joint publication (NAVMC) directive in the 1200 Standard Subject Identification Code (SSIC) series to capture changes to the MOS system. Previous versions of MCO 1200.17_ series directives are cancelled, including MCO 1200.17E, the last in the series before beginning the annual NAVMC-type directive series. On 30 June 2016, the Marine Corps announced the renaming of 19 MOSs with gender-neutral job titles, replacing the word or word-part "man" with the word "Marine" in most. Not all instances of the word or word-part "man" were removed, e.g., 0171 Manpower Information Systems (MIS) Analyst, 0311 Rifleman, 0341 Mortarman. On 15 October 2020, the Marine Corps announced a structured review of 67 Marine Corps MOSs. This review is part of a larger Marine Corps force redesign initiated in March 2020 which was initiated to help the Corps re-align for the future. Restrictions on officer MOSs include: An enlisted applicant (male or female) seeking a Program Enlisted For (PEF) code associated with MOSs 0311, 0313, 0321, 0331, 0341, 0351, 0352, 0811, 0842, 0844, 0847, 0861, 1371, 1812, 1833, 2131, 2141, 2146, 2147, or 7212 must meet certain gender-neutral physical standards. For the Initial Strength Test (IST), the applicant must achieve 3 pull-ups, a 13:30 1.5-mile run, 44 crunches, and 45 ammo can lifts. The MOS Classification Standards based on a recruits final CFT and PFT are: 6 pull-ups, 24:51 3-mile run, 3:12 Maneuver Under Fire Course, 3:26 Movement to Contact Court, and 60 ammo can lifts. Below are listed the current authorized Marine Corps MOSs, organized by OccFld, then by specific MOS. Most MOSs have specific rank/pay grade requirements and are listed to the right of the MOS title, if applicable (see United States Marine Corps rank insignia), abbreviated from the highest allowed rank to the lowest. Officer ranks are noted as Unrestricted Line Officers (ULOs), Limited Duty Officers (LDOs), and Warrant Officers (WOs). Those MOSs which are no longer being awarded are generally kept active within the Marine's service records to allow Marines to earn a new MOS and to maintain a record of that Marine's previous skills and training over time. All MOSs entered into the Marine Corps Total Force System (MCTFS) electronic service records will populate into DoD manpower databases, and be available upon request to all Marines through their Verification of Military Education and Training (VMET) portal, even when MOSs are merged, deactivated, or deleted from the current NAVMC 1200 bulletin, or from MCTFS. Note: All listed MOSs are PMOS, unless otherwise specified.

Types of MOSs

There are three categories of MOSs: There are six types of MOSs, divided into primary MOSs and non-primary MOSs. Primary MOSs are of three types: There are also three types of non-PMOSs: Reporting MOSs and billet designators are special MOSs:

Relationship of MOS to promotions

Officers are selected for promotion for their potential to carry out the duties and responsibilities of the next higher grade based upon past performance as indicated in their official military personnel file. Promotions should not be considered a reward for past performance, but as incentive to excel in the next higher grade. Officers are not strictly promoted based upon their MOS; all MOS carried by an officer are considered during the selection board process. Enlisted Marines are promoted based upon their Basic MOS, or their PMOS if one has been earned, not their AMOS, FMOS, NMOS, or EMOS, although upon consideration by a selection board for promotion to Staff Sergeant (E-6) and above, the Board Members will be able to view evidence of other MOSs in the service records of the Marine.

01 Personnel & Administration

Enlisted Officer

02 Intelligence

Enlisted Officer

03 Infantry

Enlisted *****The core enlisted infantry MOSs for the USMC are 0311, 0331 , 0341 , (formerly 0351 until 2021 ) , and 0352 ; and Marines are trained in these jobs at the School of Infantry. All other infantry jobs are taught in follow-on courses after training in one of the core jobs. Officer

04 Logistics

Enlisted Officer

05 Marine Air-Ground Task Force (MAGTF) Plans

Enlisted Officer

06 Communications

Enlisted Officer

08 Artillery

Enlisted Officer

09 Training

Enlisted Officer

11 Utilities

Enlisted Officer

13 Engineer, Construction, Facilities, & Equipment

Enlisted Officer

17 Information Maneuver

Enlisted Officer

18 Tank and Assault Amphibious Vehicle

Enlisted Officer

21 Ground Ordnance Maintenance

Enlisted Officer

23 Ammunition and Explosive Ordnance Disposal

Enlisted Officer

25 Communications (OccFld deleted entirely 1 Oct 2005)

Enlisted Officer

26 Signals Intelligence/Ground Electronic Warfare

Enlisted Officer

27 Linguist

Enlisted/Officer (All Linguist MOSs are EMOSs primarily used in conjunction with the 267X primary MOSs that indicate specialized foreign language skills.) Middle East-Africa Asia-Pacific European I (West) European II (East)

28 Ground Electronics Maintenance

Enlisted Officer

30 Supply Chain Material Management

Enlisted Officer

31 Distribution Management

Enlisted Officer

33 Food Service

Enlisted Officer

34 Financial Management

Enlisted Officer

35 Motor Transport

Enlisted Officer

40 Data Systems (OccFld deleted after 1 Oct 2005)

Enlisted Officer

41 Morale Welfare and Recreation

Enlisted Officer

43 Public Affairs

Enlisted Officer

44 Legal Services

Enlisted Officer

45 Communication Strategy and Operations

Enlisted Officer

46 Combat Camera (COMCAM)

Enlisted Officer

48 Recruiting and Retention Specialist

Enlisted Officer

55 Music

Enlisted The following MOSs apply only to the Drum and Bugle Corps: Officer

57 Chemical, Biological, Radiological, and Nuclear (CBRN) Defense

Formally known as Nuclear, Biological and Chemical Defense (NBCD) Enlisted Officer

58 Military Police and Corrections

Enlisted Officer

59 Aviation Command and Control (C2) Electronics Maintenance

Enlisted Officer

60/61/62 Aircraft Maintenance

Enlisted Officer

63/64 Avionics

Enlisted Officer

65 Aviation Ordnance

Enlisted Technician Officer

66 Aviation Logistics

Enlisted Officer

68 Meteorological and Oceanographic (METOC)

Enlisted Officer

70 Airfield Services

Enlisted Officer

72 Air Control/Air Support/Anti-air Warfare/Air Traffic Control

Enlisted Officer

73 Navigation Officer/Enlisted Flight Crews

Enlisted Officer

75 Pilots/Naval Flight Officers (All MOS in this OccFld are not available to Warrant/ Chief Warrant Officers)

Officer

80 Miscellaneous MOSs (Category II)

Officer Enlisted

90 Identifying and Reporting MOSs (Category III)

Enlisted Officer

Explanatory notes