List of United States Army careers

The United States Army uses various personnel management systems to classify soldiers in different specialties. Enlisted soldiers are categorized by their assigned job called a military occupational specialty, or MOS. Each MOS are labeled with a short alphanumerical code called a military occupational specialty code (MOSC), which consists of a two-digit number appended by a Latin letter. Related MOSs are grouped together by Career Management Fields (CMF). For example, an enlisted soldier with MOSC 11B works as an infantryman (his MOS), and is part of CMF 11 (the CMF for infantry).

Commissioned officers are classified by their area of concentration, or AOC. Just like enlisted MOSCs, AOCs are two digits plus a letter. Related AOCs are grouped together by specific branch of the Army or by broader in scope functional areas (FA). Typically, an officer will start in an AOC of a specific branch and move up to an FA AOC.

Warrant officers are classified by warrant officer military occupational specialty, or WOMOS. Codes consists of three digits plus a letter. Related WOMOS are grouped together by Army branch.

The Army is currently restructuring its personnel management systems. Changes took place in 2004 and will continue into 2013. Changes already taken place include deleting obsolete jobs, merging redundant jobs, and using common numbers for both enlisted CMFs and officer AOCs (e.g. "35" is military intelligence for both officers and enlisted).

Immaterial & Personnel Special Reporting Codes

Officer
*00A Duties Unassigned
*00B General Officer
*00C Relieved from Duty; Sick in Hospital or Quarters
*00D Newly Commissioned Officers Awaiting Entry on Active Duty for Officer Basic Course Attendance
*00E Student Officer
*01A Officer Generalist
*01B Aviation/Infantry/Armor/MI Immaterial
*01C Chemical/Engineer/MP Immaterial
*02A Combat Arms Generalist
*02B Infantry/Armor Immaterial
*02C Infantry/Armor/Field Artillery/Engineer Immaterial
*03A Infantry/Armor Immaterial
*05A Army Medical Department
*09G National Guard on Active Duty Medical Hold
*09H US Army Reserve on Active Duty Medical Hold

Warrant
*001A Unqual in Auth WO MOS
*002A Patient
*003A Student
*004A Duties Unassigned
*011A Brch/MOS Immaterial
*019G National Guard on Active Duty Medical Hold
*019H US Army Reserve on Active Duty Medical Hold

Enlisted
*00D Special Duty Assignment
*00F MOS Immaterial National Guard Bureau (NGB)
*00G MOS Immaterial US Army Reserve (USAR)
*00S Special Duty Assignment AFSC
*00Z Command Sergeant Major
*09B Trainee Unassigned
*09C Trainee Language
*09D College Trainee
*09G National Guard (NG) on Active Duty Medical Hold
*09H US Army Reserve (USAR) on Active Duty Medical Hold
*09J GED Completion Program
*09L Interpreter/Translator
*09M March 2 Success
*09N Nurse Corps Candidate
*09R Simultaneous MBR Program
*09S Commissioned Officer Candidate
*09T College Student Army National Guard Officer Program
*09W Warrant Officer Candidate

Infantry Branch (IN)

Officer
*11A Infantry OfficerEnlisted
*11B Infantryman
*11C Indirect Fire Infantryman
*11X Infantryman "(status upon infantry initial entry training; turns into 11B or 11C)"
*11Z Infantry Senior Sergeant "(Rank 1SG)"

Corps of Engineers Branch (EN)

"CMF 21 changes to CMF 12 effective Oct 2010"

Officer
*12A Engineer, General
*12B Combat Engineer
*12D Facilities/Contract Construction Management Engineer (FCCME)

Warrant
*120A Utilities Operation and Maintenance Technician
*125D Geospatial Information Technician

Enlisted
*12B Combat Engineer
*12C Bridge Crew Member
*12D Diver
*12G Quarrying Specialist
*12H Construction Engineering Supervisor
*12K Plumber
*12M Firefighter
*12N Horizontal Construction Engineer
*12P Prime Power Production Specialist
*12Q Transmission and Distribution Specialist
*12R Interior Electrician
*12T Technical Engineer
*12V Concrete and Asphalt Equipment Operator
*12W Carpentry and Masonry Specialist
*12X General Engineering Supervisor
*12Y Terrain Data Supervisor
*12Z Combat Engineering Senior Sergeant

Field Artillery Branch (FA)

Officer
*13A Field Artillery Officer

Warrant
*131A Field Artillery Targeting Technician

Enlisted
*13B Cannon Crew Member
*13C Tactical Automated Fire Control Systems Specialist (13C and 13E merged into 13D)
*13D Field Artillery Tactical Data Systems Specialist
*13E Cannon Fire Direction Specialist (13C and 13E merged into 13D)
*13F Fire Support Specialist
*13M MLRS/HIMARS Crew Member
*13P MLRS Automated Tactical Data Systems Specialist
*13R Field Artillery Firefinder Radar Operator
*13S Field Artillery Surveyor "(to be del Oct 2010)"
*13T Field Artillery Surveyor/Meteorological Crew Member "(replaces 13S & 13W)"
*13W Field Artillery Meteorological Crew Member "(to be del Oct 2010)"
*13X Field Artillery Enlistment Option "(turns into 13B, 13D, 13F, 13M, 13P, 13R, or 13W)"
*13Z Field Artillery Senior Sergeant

Air Defense Artillery Branch (ADA)

Officer
*14A Air Defense Artillery Officer

Warrant
*140A Command and Control Systems Technician
*140E Air and Missile Defense (AMD) Tactician/Technician (Patriot Systems Technician)
*140X Air Defense Artillery (ADA) Immaterial

Enlisted
*14E Patriot Fire Control Enhanced Operator/Maintainer
*14J Air Defense Tactical Operations Center Operator/Maintainer
*14M Man Portable Air Defense System Crew Member
*14R Bradley Linebacker Crew Member "(to be del Sept 2009)"
*14S Avenger Crew Member
*14T PATRIOT Launching Station Enhanced Operator/Maintainer
*14Z Air Defense Artillery (ADA) Senior Sergeant

Aviation Branch (AV)

Officer
*15A Aviation, General
*15B Aviation Combined Arms Opeations
*15C Aviation All-Source Intelligence
*15D Aviation Logistics "(to be del Sept 2010)"

Warrant
*150A Air Traffic and Air Space Management Technician
*150U Tactical Unmanned Aerial Vehicle (TUAV) Operations Technician
*151A Aviation Maintenance Technician (Nonrated)
*152B OH-58A/C Pilot
*152C OH-6 Pilot
*152D OH-58D Pilot
*152E ARH-XX Pilot
*152F AH-64A Pilot
*152H AH-64D Pilot
*153A Rotary Wing Aviator (Aircraft Nonspecific)
*153B UH-1 Pilot
*153D UH-60 Pilot
*153E MH-60 Pilot
*153L UH-72A Pilot
*153M UH-60M Pilot
*154C CH-47D Pilot
*154E MH-47 Pilot
*154F CH-47F Pilot
*155A Fixed Wing Aviator (Aircraft Nonspecific)
*155E C-12 Pilot
*155F Jet Aircraft Pilot
*155G O-5A/EO-5B/RC-7 Pilot

Enlisted
*15A Aircraft Life Support System (ALSS) Repairer
*15B Aircraft Powerplant Repairer
*15D Aircraft Powertrain Repairer
*15F Aircraft Electrician
*15G Aircraft Structural Repairer
*15H Aircraft Pneudraulics Repairer
*15J OH-58D Armament/Electrical/Avionics Systems Repairer
*15K Aircraft Components Repair Supervisor
*15M UH-1 Helicopter Repairer
*15N Avionics Mechanic
*15P Aviation Operations Specialist
*15Q Air Traffic Control Operator
*15R AH-64 Attack Helicopter Repairer
*15S OH-58D/ARH Helicopter Repairer
*15T UH-60 Helicopter Repairer
*15U CH-47 Helicopter Repairer
*15V Observation/Scout Helicopter Repairer
*15W Unmanned Aerial Vehicle Operator
*15X AH-64 Armament/Electrical Systems Repairer
*15Y AH-64D Armament/ Electrical Systems Repairer
*15Z Aircraft Maintenance Senior Sergeant

pecial Forces Branch (SF)

Officer
*18A Special Forces Officer

Warrant
*180A Special Forces Warrant Officer

Enlisted
*18B Special Forces Weapons Sergeant
*18C Special Forces Engineer Sergeant
*18D Special Forces Medical Sergeant
*18E Special Forces Communications Sergeant
*18F Special Forces Assistant Operations & Intelligence Sergeant
*18X Special Forces Candidate
*18Z Special Forces Operations Sergeant

Armor Branch (AR)

Officer
*19A Armor, General
*19B Armor (in an armor slot)
*19C Cavalry

Enlisted
*19D Cavalry Scout
*19K Armor Crew Member
*19Z Armor Senior Sergeant

Telecommunications Systems Engineering FA

Officer
*24A Telecommunications Systems Engineer
*24X Designated Telecommunications Systems Engineer

ignal Corps Branch (SC)

Officer
*25A Signal, General

Warrant
*250N Network Management Technician
*251A Information Systems Technician
*254A Signal Systems Support Technician
*255Z Senior Signal Systems Technician

Enlisted
*25B Information Technology Specialist
*25C Radio Operator Maintainer
*25E Electromagnetic Spectrum Manager
*25F Network Switching Systems Operator/Maintainer
*25L Cable Systems Installer/Maintainer
*25M Multimedia Illustrator
*25N Joint Networking Nodal System Operators/Maintainers
*25P Microwave Systems Operator/Maintainer
*25Q Multichannel Transmission Systems Operator
*25R Visual Information/Audio Equipment Repairer
*25S Satellite Communication Systems Operator/Maintainer
*25T Satellite/Microwave Systems Chief
*25U Signal Support Systems Specialist
*25V Combat Documentation & Production Specialist
*25W Telecommunications Operations Chief
*25X Senior Signal Sergeant
*25Z Visual Information Operations Chief

Judge Advocate General Branch (JA)

Officer
*27A Judge Advocate General
*27B Military Judge

Warrant
*270A Legal Administrator

Enlisted
*27D Paralegal Specialist

Information Operations FA

Officer
*30A Information Operations Officer

Military Police Branch (MP)

Officer
*31A Military Police

Warrant
*311A CID Special Agent

Enlisted
*31B Military Police
*31D CID Special Agent
*31E Internment/Resettlement Specialist

trategic Intelligence FA

Officer
*34A Strategic Intelligence Officer

Military Intelligence Branch (MI)

Officer
*35C Imagery Intelligence
*35D All Source Intelligence
*35E Counterintelligence
*35F Human Intelligence
*35G Signals Intelligence/Electronic Warfare

Warrant
*350F All Source Intelligence Technician
*350G Imagery Intelligence Technician
*350Z Attaché Technician
*351L Counterintelligence Technician
*351M Human Intelligence Collection Technician
*351Y Area Intelligence Technician
*352N Signal Intelligence Analysis Technician
*352P Voice Intercept Technician
*352S Signal Collection Technician
*353T IEW Systems Maintenance Technician

Enlisted
*35F Intelligence Analyst
*35G Imagery Analyst
*35H Common Ground Station (CGS) Analyst "(to be del Nov 2010)"
*35L Counterintelligence Agent
*35M Human Intelligence Collector
*35N Signals Intelligence Analyst
*35P Cryptologic Linguist
*35S Signals Collector/Analyst
*35T Military Intelligence Systems Maintainer/Integrator
*35W EW/SIGINT Recruit
*35X Intelligence Senior Sergeant/Chief Intelligence Sergeant
*35Y Chief Counter Intelligence/Human Intelligence Sergeant
*35Z Signals Intelligence (Electronic Warfare) / Senior Sergeant/ Chief

Financial Management Branch (FI)

Officer
*36A Financial Manager "(formerly 44A)"Enlisted
*36B Financial Management Technician "(formerly 44C)"

Psychological Operations Branch (PO)

Officer
*37A Psychological Operations
*37X Psychological Operations, Designated

Enlisted
*37F Psychological Operations Specialist

Civil Affairs Branch (CA)

Officer
*38A Civil Affairs
*38X Civil Affairs, Designated

Enlisted
*38B Civil Affairs Specialist

pace Operations FA

Officer
*40A Space Operations
*40C Army Astronaut

Adjutant General/Army Band Branch (AG)

Officer
*42B Human Resources Officer
*42C Army Bands
*42H Senior Human Resources Officer

Warrant
*420A Human Resources Technician
*420C Bandmaster

Enlisted
*42A Human Resource Specialist
*42F Human Resource Information Systems Management Specialist
*42R Army Bandperson
*42S Special Army Band Member

Public Affairs FA/CMF

Officer
*46A Public Affairs, General
*46X Public Affairs, General

Enlisted
*46Q Public Affairs Specialist
*46R Public Affairs Broadcast Specialist
*46Z Chief Public Affairs NCO

USMA Stabilized Faculty FA

Officer

*47A USMA, Professor
*47C USMA, Professor of English
*47D USMA, Professor of Electrical Engineering and Computer Science
*47E USMA, Professor of Law
*47F USMA, Professor of Systems Engineering
*47G USMA, Professor of Foreign Languages
*47H USMA, Professor of Physics
*47J USMA, Professor of Social Sciences
*47K USMA, Professor of History

*47L USMA, Professor of Behavioral Sciences and Leadership
*47M USMA, Professor of Chemistry
*47N USMA, Professor of Mathematical Sciences
*47P USMA, Professor of Geography and Environmental Engineering
*47Q USMA, Professor and Associate Dean
*47R USMA, Professor of Civil and Mechanical Engineering
*47S USMA, Professor of Physical Education
*47T USMA, Professor of Leader Development and Organizational Learning
*47U USMA, Professor of Military Art and Science

Foreign Area Officer FA

Officer
*48B Latin America
*48C Europe
*48D South Asia
*48E Eurasia
*48F China
*48G Mideast/North Africa
*48H Northeast Asia
*48I Southeast Asia
*48J Africa, South of the Sahara
*48X Foreign Area Officer

Operations Research/Systems Analysis (ORSA) FA

Officer
*49A Operations Research/Systems Analysis
*49W Trained, ORSA
*49X Untrained, ORSA

Force Management FA

Officer
*50A Force Development

Research, Development & Acquisition FA/Acquisition, Logistics & Technology CMF

Officer
*51A Systems Development
*51C Contract and Industrial Management
*51R Systems Automation Acquisition and Engineering
*51S Research and Engineering
*51T Test and Evaluation
*51Z Acquisition

Enlisted
*51C Acquisition, Logistics & Technology (AL&T) Contracting NCO

Nuclear and Counterproliferation FA

Officer
*52B Nuclear and Counterproliferation

ystems Automation Officer FA

Officer
*53A Information Systems Management
*53X Designated Systems Automation

Chaplain Branch (CH)

Officer
*56A Command and Unit Chaplain
*56D Clinical Pastoral Educator

Enlisted
*56M Chaplain Assistant

imulations Operations FA

Officer
*57A Simulations Operations Officer

trategic Plans and Policy FA

Officer
*59A Strategic Plans and Policy

Medical Department Branches

=Medical Corps Branch (MC)=

Officer

*60A Operational Medicine
*60B Nuclear Medicine Officer
*60C Preventive Medicine Officer
*60D Occupational Medicine Officer
*60F Pulmonary Disease/Critical Care Officer
*60G Gastroenterologist
*60H Cardiologist
*60J Obstetrician and Gynecologist
*60K Urologist
*60L Dermatologist
*60M Allergist, Clinical Immunologist
*60N Anesthesiologist
*60P Pediatrician
*60Q Pediatric Sub-Specialist
*60R Child Neurologist
*60S Ophthalmologist
*60T Otolaryngologist
*60U Child Psychiatrist
*60V Neurologist
*60W Psychiatrist
*61A Nephrologist

*61B Medical Oncologist/Hematologist
*61C Endocrinologist
*61D Rheumatologist
*61E Clinical Pharmacologist
*61F Internist
*61G Infectious Disease Officer
*61H Family Medicine
*61J General Surgeon
*61K Thoracic Surgeon
*61L Plastic Surgeon
*61M Orthopedic Surgeon
*61N Flight Surgeon
*61P Physiatrist
*61Q Radiation Oncologist
*61R Diagnostic Radiologist
*61U Pathologist
*61W Peripheral Vascular Surgeon
*61Z Neurosurgeon
*62A Emergency Physician
*62B Field Surgeon

Dental Corps Branch (DE)

Officer

*63A General Dentist
*63B Comprehensive Dentist
*63D Periodontist
*63E Endodontist
*63F Prosthodontist
*63H Public Health Dentist

*63K Pediatric Dentist
*63M Orthodontist
*63N Oral and Maxillofacial Surgeon
*63P Oral Pathologist
*63R Executive Dentist

Veterinary Corps Branch (VE)

Officer
*64A Veterinary Corps OfficerWarrant
*640A Veterinary Services Food Safety Technician

Medical Specialist Corps Branch (SP)

Officer
*65A Occupational Therapy
*65B Physical Therapy
*65C Dietitian
*65D Physician Assistant
*65X Specialist Allied Operations

Nurse Corps Branch (AN)

Officer
*66B Community Health Nurse
*66C Psychiatric/Mental Health Nurse
*66E Perioperative Nurse
*66F Nurse Anesthetist
*66G Obstetrics and Gyneco
*66H Medical-Surgical Nurse
*66N Generalist Nurse
*66P Family Nurse Practitioner

Medical Service Corps Branch (MS)

Officer
*67A Health Services
*67B Laboratory Sciences
*67C Preventive Medicine Sciences
*67D Behavioral Sciences
*67E Pharmacy
*67F Optometry
*67G Podiatry
*67J Aeromedical Evacuation

Warrant
*670A Health Services Maintenance Technician

Medical CMF

Enlisted
*68A Medical Equipment Repairer
*68D Operating Room Specialist
*68E Dental Specialist
*68G Patient Administration Specialist
*68H Optical Laboratory Specialist
*68J Medical Logistic Specialist
*68K Medical Laboratory Specialist
*68M Hospital Food Specialist
*68P Radiology Specialist
*68Q Pharmacy Specialist
*68R Veterinary Food Inspection Specialist
*68S Preventive Medicine Specialist
*68T Animal Care Specialist
*68V Respiratory Specialist
*68W Combat Medic
*68X Mental Health Specialist
*68Z Chief Medical NCO

Health Services FA

Officer
*70A Healthcare Administrator
*70B Health Services Officer
*70C Comptroller
*70D Information Systems Manager
*70E Patient Administrator
*70F Human Resources Manager
*70H Plans, Operations, Intelligence Training, and Security
*70K Medical Logistics

Laboratory Sciences FA

Officer
*71A Microbiology
*71B Biochemistry
*71E Clinical Laboratory
*71F Research Psychology

Preventive Medicine Sciences FA

Officer
*72A Nuclear Medical Science
*72B Entomology
*72C Audiology
*72D Environmental Science and Engineering

Behavioral Sciences FA

Officer
*73A Social Work
*73B Clinical Psychology

Chemical Branch (CM)

Officer
*74A Chemical, General
*74B Chemical Operations and Training "(to be del Oct 2010)"
*74C Chemical Munitions and Materiel Management "(to be del Oct 2010)"

Enlisted
*74D Chemical Biological Radiological and Nuclear Operations Specialist "(formerly 54B)"

Additional skill identifiers

*L3 Technical Escorting.
*LI Master Fox Scout (SL 3 and 4 only).
*L4 Biological Integrated Detection System (BIDS) (SL I thru SL 4).
*L5 NBC Reconnaissance.
*P5 Master Fitness Trainer.
*2S Battle Staff Operations (skill level 3 and above).
*4A Reclassification Training.

Speciall skill identifiers
*E Military Mountaineer
*G Ranger
*8 Instructor
*L Linguist
*M First Sergeant
*P Parachutist
*Q Equal Opportunity Advisor (EOA)
*R Chemical, Biological, Radiological and Nuclear (CBRN) Responder
*S Special Operations Support Personnel
*X Drill Sergeant

Recruiting and Retention CMF

Enlisted
*79R Recruiter Noncommissioned Officer
*79S Career Counselor
*79T Recruiting and Retention NCO (ANG)
*79V Retention and Transition NCO (USAR)

Logistics FA

As of 1 Jan 2008, all officers from Quartermaster, Transportation and Ordnance branches who have attended the Captain's Career Course, with the exception of EOD officers (89E), will be transitioned to the new Logistics branch.

Officer
*90A Multifunctional Logistician

Transportation Branch (TC)

Officer
*88A Transportation, General
*88B Traffic Management
*88C Marine and Terminal Operations
*88D Motor/Rail Transportation

Warrant
*880A Marine Deck Officer
*881A Marine Engineering Officer
*882A Mobility Officer

Enlisted
*88H Cargo Specialist
*88K Watercraft Operator
*88L Watercraft Engineer
*88M Motor Transport Operator
*88N Traffic Management Coordinator
*88P Railway Equipment Repairer
*88T Railway Section Repairer
*88U Railway Operations Crew Member
*88Z Transportation Senior Sergeant

Ammunition CMF, Mechanical Maintenance CMF & Ordnance Branch (OD)

Officer
*89E Explosive Ordnance Disposal
*91A Ordnance Officer

Warrant
*890A Ammunition Technician
*913A Armament Systems Maintenance Technician
*914A Allied Trades Technician
*915A Automotive Maintenance Technician
*915E Senior Automotive Maintenance/Senior Ordnance Logistics Officer
*919A Engineer Equipment Maintenance Technician

Enlisted
*89A Ammunition Stock Control and Accounting Specialist
*89B Ammunition Specialist
*89D Explosive Ordnance Disposal Specialist
*91A M1 Abrams Tank System Maintainer "(formerly 63A)"
*91B Wheeled Vehicle Mechanic "(formerly 63B)"
*91C Utilities Equipment Repairer "(formerly 52C)"
*91D Power-Generation Equipment Repairer "(formerly 52D)"
*91E Allied Trades Specialist "(formerly 44E)"
*91F Small Arms/Artillery Repairer "(formerly 45B)"
*91G Fire Control Repairer "(formerly 45G)"
*91H Track Vehicle Repairer "(formerly 63H)"
*91J Quartermaster and Chemical Equipment Repairer "(formerly 63J)"
*91K Armament Repairer "(formerly 45K)"
*91L Construction Equipment Repairer "(formerly 62B)"
*91M Bradley Fighting Vehicle System Maintainer "(formerly 63M)"
*91P Artillery Mechanic "(formerly 63D)"
*91W Metal Worker "(formerly 44B)"
*91X Maintenance Supervisor "(formerly 63X)"
*91Z Mechanical Maintenance Supervisor "(formerly 63Z)"

Quartermaster Corps Branch (QM)

Officer
*92A Quartermaster Officer

Warrant
*920A Property Accounting Technician
*920B Supply Systems Technician
*921A Airdrop Systems Technician
*922A Food Service Technician
*923A Petroleum Systems Technician

Enlisted
*92A Automated Logistical Specialist
*92F Petroleum Supply Specialist
*92G Food Service Specialist
*92L Petroleum Laboratory Specialist
*92M Mortuary Affairs Specialist
*92R Parachute Rigger
*92S Shower/Laundry and Clothing Repair Specialist
*92W Water Treatment Specialist
*92Y Unit Supply Specialist
*92Z Senior Noncommissioned Logistician

Electronic Maintenance & Calibrations CMF

Warrant
*948B Electronic Systems Maintenance Technician
*948D Electronic Missile Systems Maintenance Technician
*948E Senior Electronics Maintenance Technician

Enlisted
*94A Land Combat Electronic Missile System Repairer
*94D Air Traffic Control Equipment Repairer
*94E Radio and Communications Security Repairer
*94F Computer Detection Systems Repairer
*94H Test, Measurement & Diagnostic Equipment Support Specialist
*94K Apache Attack Helicopter Systems Repairer
*94L Avionics Communications Equipment Repairer
*94M Radar Repairer
*94P Multiple Launch Rocket System Repairer
*94R Avionic and Survivability Equipment Repairer
*94S Patriot System Repairer
*94T Avenger System Repairer
*94W Electronic Maintenance Chief
*94X Senior Missile Systems Maintainer
*94Y Integrated Family of Test Equipment (IFTE) Operator and Maintainer
*94Z Senior Electronic Maintenance Chief

References

* [http://www.globalsecurity.org/military/library/policy/army/fm/7-21-13/appf.htm Field Manual 7-21.13, Appendix F: Arms and Services of the Army]
* [https://www.armyg1.army.mil/pamxxi/secured/mosstructure/mos-charts.asp MOS charts United States Army PAMXXI Personnel Authorizations Module]

External links

* [http://www.koreanwar-educator.org/topics/p_mos.htm#ArmyMOSTitles "Korean War Educator, Topics - Military Occupational Specialty (MOS)"] , Korean War Educator Foundation. Provides list of MOSs during the Korean War era.
* [http://www.tomahawks.us/what_was_my_mos.htm “What Was my MOS? Vietnam-era MOS Codes”] , 4th Battalion (Mechanized)/23rd Infantry Regiment "Tomahawks" Association Website. Provides list of MOSs during the Vietnam War era.