Marine Corps Enlisted MOS Descriptions

The United States Marine Corps’s Military Occupational Specialty (MOS) is a system of categorizing career fields. All enlisted and officer Marines are assigned a four digit code denoting their occupational field and specialty. 

Occupational Fields are identified in the first two digits and represent a grouping of related MOSs. Job codes are identified in the last two digits and represent a specific job within that OccFld. An MOS can be awarded as a Primary MOS (PMOS), an Additional MOS (AMOS), a Skill Designator, or Category II MOS (which denote special skills assignments or simply to account for structure when required). 

Below are listed the current authorized Marine Corps MOSs, organized by OccFld, then by specific MOS. Those MOSs which are no longer being awarded are kept active to allow Marines to earn a new MOS01 – Personnel and Administration

Primary MOS’s
0121– Personnel Clerk
0151– Administrative Clerk
0161– Postal Clerk
0193– Personnel/Administrative Chief

Secondary MOS’s (See Note Below)
0171– Manpower Information Systems Analyst

02 – Intelligence

Primary MOS’s
0211– Counterintelligence (CI) Specialist
0231– Intelligence Specialist
0241– Imagery Analysis Specialist
0251– Interrogator/Debriefer
0261– Geographic Intelligence Specialist
0291– Intelligence Chief

Secondary MOS’s (See Note Below)
0212– Technical Surveillance Countermeasures (TSCM) Specialist

03 – Infantry

0311– Rifleman
0313– LAV Crewman
0321– Reconnaissance Man
0331– Machine Gunner
0341– Mortarman
0351– Assaultman
0352– Antitank Assault Guided Missileman
0369– Infantry Unit Leader

05 Marine Air Ground Task Force Plans

0511– MAGTF Planning Specialist

06 Command and Control Systems

Primary MOS’s
0612– Field Wireman
0613– Construction Wireman
0614– Unit Level Circuit Switch (ULCS) Operator/Maintainer
0619– Wire Chief
0621– Field Radio Operator
0622– Mobile Multichannel Equipment Operator
0624– High Frequency Communication Central Operator
0626– Fleet SATCOM Terminal Operator
0627– Ground Mobile Forces SATCOM Operator
0629– Radio Chief
0691– Operational Communication Chief

Secondary MOS’s (See Note Below)
0647– PLRS Master Station Operator
0648– Radio Frequency Management Technician

08 Field Artillery

0811– Field Artillery Cannoneer
0842– Field Artillery Radar Operator
0844– Field Artillery Fire Control Man
0847– Artillery Meteorological Man
0848– Field Artillery Operations Man
0861– Fire Support Man

11 Utilities

1141– Electrician
1142– Electrical Equipment Repair Specialist
1161– Refrigeration Mechanic
1169– Utilities Chief
1171– Hygiene Equipment Operator
1181– Fabric Repair Specialist

13 Engineer, Construction, Facilities, and Equipment

Primary MOS’s
1316– Metal Worker SSgt to Pvt
1341– Engineer Equipment Mechanic SSgt to Pvt
1345– Engineer Equipment Operator SSgt to Pvt
1349– Engineer Equipment Chief MGySgt to GySgt
1361– Engineer Assistant GySgt to Pvt
1371– Combat Engineer MGySgt to Pvt
1391– Bulk Fuel Specialist MGySgt to Pvt

Secondary MOS’s (See Note Below)
1342– Small Craft Mechanic

18 Tank and Assault Amphibious Vehicle

1812– M1A1 Tank Crewman
1833– Assault Amphibious Vehicle (AAV) Crewman

21 Ordnance

Primary MOS’s
2111– Small Arms Repairer/Technician
2131– Towed Artillery Systems Technician
2141– Assault Amphibious Vehicle (AAV) Repairer/Technician
2146– Main Battle Tank (MBT) Repairer/Technician
2147– Light Armored Vehicle (LAV) Repairer/Technician
2149– Ordnance Vehicle Maintenance Chief
2161– Machinist
2171– Electro-Optical Ordnance Repairer
2181– Senior Ground Ordnance Weapons Chief

Secondary MOS’s (See Note Below)
2112– Precision Weapons Repairer

23 Ammunition and Explosive Ordnance Disposal

2311– Ammunition Technician
2336– Explosive Ordnance Disposal Technician

25 Operational Communications

2542– Communication Center Operator
2549– Communication Center

26 Signals Intelligence/Ground Electronic Warfare

Primary MOS’s
2621– Communications Signal Collection/Manual Morse Operator/Analyst
2631– Electronic Intelligence (ELINT) Intercept Operator/Analyst
2651– Special Intelligence System Administrator/Communicator
2671– Arabic Cryptologic Linguist
2673– Korean Cryptologic Linguist
2674– Spanish Cryptologic Linguist
2676– Russian Cryptoloqic Linguist
2691– Signals Intelligence/Electronic Warfare Chief

Secondary MOS’s (See Note Below)
2629– Signals Intelligence Analyst
2643– Cryptologic Linguist
2649– Cryptanalyst

27 Linguist

Skill Designator MOS’s
2711 — Afghan Pushtu
2712 — Arabic (Mod Std)
2713 — Arabic (Egyptian)
2714 — Arabic (Syrian)
2716 — Amharic
2717 — Bengali
2718 — Hebrew
2719 Hindi
2721 — Kurdish
2722 Persian-Farsi
2723 — Somali
2724 — Swahili
2726 — Turkish
2727 — Urdu
Asian Pacific Linguists
2733 — Burmese
2734 — Cambodian
2736 — Chinese (Cant)
2737 — Chinese (Man)
2738 — Indonesian
2739 — Japanese
2741 — Korean
2742 — Laotian
2743 — Malay
2744 — Tagalog
2846 — Thai
2747 Vietnamese
European (West) Linguists
2754 — Dutch
2756 — Finnish
2757 — French
2758 — German
2759 — Greek
2761 — Haitian-Creole
2762 — Icelandic
2763 — Italian
2764 — Norwegian
2766 — Portuguese (BR)
2767 — Portuguese (EU)
2768 — Spanish 2769 Swedish
European (East) Linguists
2776 — Albanian
2777 — Armenian
2778 — Bulgarian
2779 — Czech
2781 — Estonian
2782 — Georgian
2783 — Hungarian
2784 — Latvian
2786 — Lithuanian
2787 — Macedonian
2788 — Polish
2789 — Romanian
2791 — Russian
2792 — Serb-Croat
2793 — Slovenian
2794 — Ukrainian
Note:A Skill-Designator MOS is a “job within a job.” It denotes a special skill or training that the Marine holds in addition to the general requirements of his/her Primary MOS.

28 Data/Communications Maintenance

Primary MOS’s
2811– Telephone Technician
2818– Personal Computer (PC)/Tactical Office Machine Repairer
2821– Computer Technician
2822– Electronic Switching Equipment Technician
2823– Technical Controller
2831– Multichannel Equipment Repairer
2832– Multichannel Equipment Technician
2834– Satellite Communications (SATCOM) Technician
2841– Ground Radio Repairer
2844– Ground Communications Organizational Repairer
2846– Ground Radio Intermediate Repairer
2847– Telephone Systems/Personal Computer Intermediate Repairer
2861– Radio Technician
2862– Ground Data/Communications Maintenance Technician
2871– Test Measurement and Diagnostic Equipment Technician
2874– Metrology Technician
2881– Communication Security Equipment Technician
2886 Artillery Electronic System Repairer
2887– Counter Mortar Radar Repairer
2889– Ground Radar Technician
2891– Data/Communications Maintenance

Secondary MOS’s (See Note Below)
2813– Cable Systems Technician
2826– AN/MSC-63A Maintenance Technician
2827– Tactical Electronic Reconnaissance Process/Evaluation Systems (TERPES) Technician
2842– Enhanced position Location Reporting System (EPLRS) System Specialist
2848– Tactical Remote Sensor System (TRSS) Maintainer
2867– AN/TSC-120 Radio Technician
2884– Ground Radar Repairer

30 Supply Administration and Operations

3043– Supply Administration and Operations Clerk
3044– Purchasing and Contracting Specialist
3051– Warehouse Clerk
3052– Packaging Specialist

31 Traffic Management

3112 – Traffic Management Specialist

33 Food Service

Primary MOS
3361 – Subsistence Supply Clerk
3381 – Food Service Specialist

Secondary MOS
3372 – Enlisted Aide

34 Financial Management

3432 Finance Technician MGySgt to Pvt
3441 NAF Audit Technician MGySgt to Pvt
3451 Fiscal/Budget Technician MGySgt to Pvt

35 Motor Transportation

Primary MOS’s
3521– Organizational Automotive Mechanic
3529– Motor Transport Maintenance Chief
3531– Motor Vehicle Operator
3533– Logistics Vehicle System Operator
3537– Motor Transport Operations Chief

Secondary MOS’s (See Note Below)
3522– Intermediate Automotive Mechanic
3524– Fuel and Electrical Systems Mechanic
3525– Crash/Fire/Rescue Vehicle Mechanic
3534– Semi-trailer Refueler Operator
3536– Vehicle Recovery Operator
3538– Licensing Examiner

40 Data Systems

Primary MOS’s
4066– Small Computer Systems Specialist
4067– Programmer, ADA
4099– Data Processing Chief

Secondary MOS’s (See Note Below)
4068– Data Network Technician
4076– Computer Security Specialist

41 Marine Corps Exchange

4113 — Morale, Welfare, Recreation (MWR) Specialist

43 Public Affairs

Primary MOS’s
4341– Combat Correspondent

Secondary MOS’s (See Note Below)
4313– Broadcast Journalist

44 Legal Services

4421 –Legal Services Specialist
4429– Legal Services Reporter (Stenotype)

46 Visual Information

Primary MOS’s
4611– Combat Illustrator
4612– Combat Lithographer
4641– Combat Photographer
4671– Combat Videographer
4691– Visual Information Chief

Secondary MOS’s (See Note Below)
4616– Reproduction Equipment Repairer

55 Music

5519 Enlisted Bandleader
5521 Band Drum Major
5523 Instrument Repair Specialist
5526 to 5566 Musician

57 Nuclear, Biological, and Chemical

5711– Nuclear Biological and Chemical (NBC) Defense Specialist

58 Military Police and Corrections

Primary MOS’s
5811– Military Police
5821– Criminal Investigator
5831– Correctional Specialist

Secondary MOS’s (See Note Below)
5812– Working Dog Handler
5813– Accident Investigator
5814– Crime Prevention/Physical Security Specialist
5816– Special Reaction Team (SRT) Member
5819– Military Police Investigator
5822– Polygraph Examiner
5832– Correctional Counselor

59 Electronics Maintenance

Primary MOS’s
5937– Aviation Radio Repairer
5939– Aviation Radio Technician
5942– Aviation Radar Technician
5948– Aviation Radar Technician
5952– Air Traffic Control Navigational Aids Technician
5953– Air Traffic Control Radar Technician
5954– Air Traffic Control Communications Technician
5959– Air Traffic Control Systems Maintenance Chief
5962– Tactical Data Systems Equipment (TDSE) Repairer
5963– Tactical Air Operations Module Repairer
5974– Tactical Data Systems Administrator (TDSA)
5979– Tactical Air Operations Module Technician
5993– Electronics Maintenance Chief

Secondary MOS’s (See Note Below)
5912– Avenger System Maintainer

60/61/62 Aircraft Maintenance

Primary MOS’s
60XX
6019– Aircraft Maintenance Chief
6042– Individual Material Readiness List (IMRL) Asset Manager
6046– Aircraft Maintenance Administration Specialist
6048– Flight Equipment Technician
6061– Aircraft Intermediate Level Hydraulic/Pneumatic Mechanic-Trainee
6062 –Aircraft Intermediate Level Hydraulic/Pneumatic Mechanic
6071– Aircraft Maintenance Support Equipment (SE) Mechanic-Trainee
6072– Aircraft Maintenance Support Equipment Hydraulic/ Pneumatic Structures Mechanic
6073– Aircraft Maintenance Support Equipment Electrician/ Refrigeration Mechanic
6074– Cryogenics Equipment Operator
6091– Aircraft Intermediate Level Structures Mechanic- Trainee
6092– Aircraft Intermediate Level Structures Mechanic
61XX
6111– Helicopter/Tiltrotor Mechanic-Trainee
6112– Helicopter Mechanic, CH-46
6113– Helicopter Mechanic, CH-53
6114– Helicopter Mechanic, UN/AH-1
6116– Tiltrotor Mechanic, MV-22
6122– Helicopter Power Plants Mechanic, T-58
6123– Helicopter Power Plants Mechanic, T-64
6124– Helicopter Power Plants Mechanic, T-400/T-700
6132– Helicopter/Tiltrotor Dynamic Components Mechanic
6151– Helicopter/Tiltrotor Airframe Mechanic-Trainee
6152– Helicopter Airframe Mechanic, CH-46
6153– Helicopter Airframe Mechanic, CH-53
6154– Helicopter Airframe Mechanic, UN/AH-1
6156– Tiltrotor Airframe Mechanic, MV-22
6172– Helicopter Crew Chief, CH-46
6173– Helicopter Crew Chief, CH-53
6174– Helicopter Crew Chief, UH-1
6176– Tiltrotor Crew Chief, MV-22
62XX
6211– Fixed-wing Aircraft Mechanic-Trainee
6212– Fixed-Wing Aircraft Mechanic, AV-8/TAV-8
6213– Fixed-Wing Aircraft Mechanic, EA-6
6214– Unmanned Aerial Vehicle (UAV) Mechanic
6216– Fixed-Wing Aircraft Mechanic, KC-130
6217– Fixed-Wing Aircraft Mechanic, F/A-18
6222– Fixed-Wing Aircraft Power Plants Mechanic, F-402
6223– Fixed-Wing Aircraft Power Plants Mechanic, J-52
6226– Fixed-Wing Aircraft Power Plants Mechanic, T-56
6227– Fixed-wing Aircraft Power Plants Mechanic, F-404
6232– Fixed-Wing Aircraft Flight Mechanic, KC-130
6241– Fixed-Wing Aircraft Flight Engineer, KC-130- Trainee
6242– Fixed-Wing Aircraft Flight Engineer, KC-130
6251– Fixed-Wing Aircraft Airframe Mechanic-Trainee
6252– Fixed-Wing Aircraft Airframe Mechanic, AV-8/TAV-8
6253– Fixed-Wing Aircraft Airframe Mechanic, EA-6
6256– Fixed-Wing Aircraft Airframe Mechanic, KC-130
6257– Fixed-Wing Aircraft Airframe Mechanic, F/A-18
6281– Fixed-Wing Aircraft Safety Equipment Mechanic- Trainee
6282– Fixed-Wing Aircraft Safety Equipment Mechanic, AV-8/TAV-8
6283– Fixed-Wing Aircraft Safety Equipment Mechanic, EA-6
6286– Fixed-Wing Aircraft Safety Equipment Mechanic, KC-130
6287– Fixed-Wing Aircraft Safety Equipment Mechanic, F/A-18

Secondary MOS’s (See Note Below)
60XX
6023– Aircraft Power Plants Test Cell Operator Fixed-Wing
6033– Aircraft Nondestructive Inspection Technician
6034– Aircraft Nondestructive Inspection Operator
6043– Aircraft Welder
61XX
6162– Presidential Support Specialist
6177– Weapons and Tactics Crew Chief Instructor
6178– VH-60N Presidential Helicopter Crew Chief
6179– VH-3D Presidential Helicopter Crew Chief

63/64 Avionics

63XX
6311– Aircraft Communications/Navigation/Electrical/Weapon Systems Technician-Trainee, OMA
6312– Aircraft Communications/Navigation/Weapon Systems Technician, AV-8
6313– Aircraft Communications/Navigation/Radar Systems Technician, EA-6
6314– Unmanned Aerial Vehicle (UAV) Avionics Technician
6316– Aircraft Communications/Navigation Systems Technician, KC-130
6322– Aircraft Communications/Navigation/Electrical Systems Technician, CH-46
6323– Aircraft Communications/Navigation/Electrical Systems Technician, CH-53
6324– Aircraft Communications/Navigation/Electrical/Weapon Systems Technician, U/AH-1
6326– Aircraft Communications/Navigation/Electrical/Weapon Systems Technician, V-22
6331– Aircraft Electrical Systems Technician-Trainee
6332– Aircraft Electrical Systems Technician, AV-8
6333– Aircraft Electrical Systems Technician, EA-6
6336– Aircraft Electrical Systems Technician, KC-130
6337– Aircraft Electrical Systems Technician, F/A-18
6386– Aircraft Electronic Countermeasures Systems Technician, EA-6B
6391– Avionics Maintenance Chief
64XX
6411– Aircraft Communications/Navigation Systems Technician- Trainee, IMA
6412– Aircraft Communications Systems Technician, IMA
6413– Aircraft Navigation Systems Technician, IFF/RADAR/TACAN, IMA
6414– Advanced Aircraft Communications/Navigation Systems Technician, IMA
6422– Aircraft Cryptographic Systems Technician, IMA
6423– Aviation Electronic Microminiature/Instrument and Cable Repair Technician, IMA
6431– Aircraft Electrical Systems Technician-Trainee
6432– Aircraft Electrical/Instrument/Flight Control Systems Technician, Fixed Wing, IMA
6433– Aircraft Electrical/Instrument/flight Control Systems Technician, Helicopter, IMA
6434– Advanced Aircraft Electrical/Instrument/Flight Control Systems Technician, IMA
6461– Hybrid Test Set Technician, IMA
6462– Avionics Test Set (ATS) Technician, IMA
6463– Radar Test Station (RTS)/Radar Systems Test Station (RSTS) Technician, IMA
6464– Aircraft Inertial Navigation System Technician, IMA
6466– Aircraft Forward Looking Infrared/Electro-Optical Technician, IMA
6467– Consolidated Automatic Support System (CASS) Technician, IMA
6468– Aircraft Electrical Equipment Test Set (EETS)/Mobile Electronic Test Set (METS) Technician
6469– Advanced Automatic Test Equipment Technician, IMA
6482– Aircraft Electronic Countermeasures Systems Technician, Fixed Wing, IMA
6483– Aircraft Electronic Countermeasures Systems Technician, Helicopter, IMA
6484– Aircraft Electronic Countermeasures Systems/RADCOM/CAT IIID Technician, IMA
6486– Advanced Aircraft Electronic Countermeasures Technician, IMA
6491– Aviation Precision Measurement Equipment (PME) Chief
6492– Aviation Precision Measurement Equipment/Calibration and Repair Technician, IMA
6493– Aviation Meteorological Equipment Technician, OMA/IMA
6494– Aviation Logistics Tactical Information Systems (ALTIS) Specialist

65 Aviation Ordnance

6511– Aviation Ordnance Trainee
6531– Aircraft Ordnance Technician
6541– Aviation Ordnance Systems Technician
6591– Aviation Ordnance Chief

66 Aviation Logistics

Primary MOS’s
6672 Aviation Supply Clerk
6673 Automated Information Systems (AIS) Computer Operator

Secondary MOS’s (See Note Below)
6694 Aviation Information Systems (AIS) Specialist

68 Weather Service

6821 Weather Observer
6842 Weather Forecaster

70 Airfield Service

7011– Expeditionary Airfield Systems Technician
7041– Aviation Operations Specialist
7051– Aircraft Firefighting and Rescue Specialist

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

Primary MOS’s
7212– Low Altitude Air Defense (LAAD) Gunner
7234– Air Control Electronics Operator
7236– Tactical Air Defense Controller
7242– Air Support Operations Operator
7251– Air Traffic Controller-Trainee
7257– Air Traffic Controller
7291– Senior Air Traffic Controller

Secondary MOS’s (See Note Below)
7252– Air Traffic Controller-Tower
7253– Air Traffic Controller-Radar
7254– Radar Approach Controller

73 Navigation Officer/Enlisted Flight Crews

Primary MOS’s
7314– Unmanned Aerial Vehicle (UAV) Air Vehicle Operator
7371– Aerial Navigator-Trainee
7372– First Navigator
7381– Airborne Radio Operator/Inflight Refueling Observer/ Loadmaster-Trainee
7382– Airborne Radio Operator/Inflight Refueling Observer/ Loadmaster ARO/IRO/LM

Secondary MOS’s (See Note Below)
7316– External Unmanned Aerial Vehicle (UAV) Operator

80-95 Category B MOS’s

8111– Combat Rubber Reconnaissance Craft (CRRC) Coxswain
8112– Riverine Assault Craft (RAC) Crewman
8114– Rigid Raiding Craft (RRC) Coxswain
8151– Guard
8152– Marine Corps Security Force (MCSF) Guard
8153– Marine Corps Security Force (MCSF) Cadre Trainer
8154– Marine Corps Security Force (MCSF) Close Quarters Battle (CQB) Team Member
8211– Education Assistant
8411– Recruiter
8412– Career Recruiter
8421– Career Planner
8431– Psychological Operations Noncommissioned Officer
8441– Civil Affairs Noncommissioned Officer
8511– Drill Instructor
8530– Marksmanship Coach
8531– Marksmanship Instructor
8532– Small Arms Weapons Instructor
8534– Equal Opportunity Advisor (EOA)
8538– Substance Abuse Counselor
8541– Scout Sniper
8551–Close Combat Instructor
8552– Close Combat Instructor-Trainer
8563– Water Safety/Survival Instructor
8611– Interpreter (Designated Language)
8621– Surveillance Sensor Operator
8641– Microminiature Repairer
8652– Reconnaissance Man, Parachute Qualified
8653–Reconnaissance Man, SCUBA/UBA Qualified
8654– Reconnaissance Man, Parachute and SCUBA/UBA Qualified
8711– Ground Operations Specialist
8811– Firefighter
8911– Barracks and Grounds Marine
8915– Food Service Attendant
8921– Athletic and Recreation Assistant
9051– Graves Registration Specialist

98-99 Special Identifier MOS

Primary Special Duty Identifier MOS’s
9811– Member, The President’s Own, United States Marine Band
9812– U.S. Marine Drum & Bugle Corps Member
9900– General Service Marine
9915– Special Assignment – Enlisted
9916– Billet Designator – Enlisted
9917– College Degree-Enlisted
9935– Special Technical Operations
9936– Substance Abuse Control Specialist
9952– SCUBA/UBA Marine
9953– Parachutist/SCUBA/UBA Marine
9954– Hazardous Material/Hazardous Waste (HM/HW) Staff Noncommissioned Officer/Noncommissioned Officer
9956– Ground Safety Specialist
9962– Parachutist
9971– Basic Marine with Enlistment Guarantee
9972– Aircrew Trainee
9981– Tactical Data Systems Specialist
9982– Small Computer Systems Operator/Programmer
9991– Sergeant Major of the Marine Corps
9999– Sergeant Major-First Sergeant

Secondary Special Duty Identifier MOS’s (See Note Below)
9960– Acquisition Specialist
9973– Fixed-Wing Transport Aircraft Specialist, KC-130J

Note: A secondary MOS is a “job within a job.” It denotes a special skill or training that the Marine holds in addition to the general requirements of his/her Primary MOS.