Personnel Development Office


Ordnance MOS Descriptions


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89A-Ammunition Stock Control and Accounting Specialist

The ammunition stock control and accounting specialist operates the Standard Ammunition and Accounting System (SAAS) computer hardware and software/utilities manual records to perform stock control and accounting procedures.

 

89B-Ammunition Specialist

The ammunition specialist receives, stores and issues conventional ammunition, guided missiles, large rockets and other ammunition related items; performs maintenance (unit, direct support and general support) modification, destruction and demilitarization on ammunition and explosive components.

 

89D-Explosive Ordnance Disposal (EOD) Specialist

Locates, identifies, renders safe and disposes of foreign and domestic conventional, biological, chemical, or nuclear ordnance and improved explosive devices (IED); weapons of mass destruction and large vehicle bombs; conducts intelligence gathering operations of first seen foreign ordnance; supports VIP missions for the U.S. Secret Service, State Department and other Federal agencies.

 

91A-M1 Abrams Tank System Maintainer

The M1 Abrams tank system maintainer supervises and performs field maintenance, diagnoses and troubleshoots malfunctions, performs organizational maintenance and on-board direct support tasks on the suspension systems, steering systems, hydraulic systems, auxiliary power units, fire extinguisher/suppression systems, gas particulate systems, vehicular mounted armament, gun turret drive system and the fire control system on the M1 tank.

 

91B-Wheeled Vehicle Repairer

The wheeled vehicle mechanic maintains wheeled vehicles, their associated trailers and MHE systems to include: use of applicable references, inspecting, servicing, maintaining, repairing, replacement, adjusting and testing of wheeled vehicles and MHE systems, subsystems and components such as: power plant/packs, compression ignition engines and engine fuel systems, air induction and exhaust systems and cooling systems. Vehicle chassis and power-train components including, frame cross members, clutches assemblies, transmissions, transfers, final drives, propeller shaft assemblies, brake systems, steering systems, suspensions systems, fifth wheel assemblies, wheeled vehicle crane, hoist and winch assemblies, and hydraulic systems. Automotive electrical systems including wiring harness, starting and charging systems.

 

91C-Utilities Equipment Repairer

The utilities equipment repairer maintains (inspects, repairs, tests and adjusts) gasoline engine systems, bottle cleaning/charging stations, air conditioner electrical systems, air conditioner vapor systems, refrigeration unit electrical systems, portable heater fuel/electrical systems, fire extinguisher recharger and fire extinguishers/valves.

 

91D-Tactical Power Generation Specialist

The power generation equipment repairer supervises and performs field and sustainment level maintenance functions, including overhaul, but not rebuild of power generation equipment, internal combustion engines and associated equipment up through 200KW (except for turbine engine driven generators).

 

91E-Allied Trades Specialist

The machinist supervises and performs the fabrication, repair and modify metallic and nonmetallic parts, utilizing such machines as engine lathes, utility grinders, power cutoff saws, armature under cutters, arbor and hydraulic presses, drill presses and their associated attachments, accessories and tools.

 

91F-Small Arms/Towed Artillery Repairer

The small arms/artillery repairer performs field and sustainment level maintenance and repairs on small arms and other infantry weapons, and towed artillery.

 

91H-Tracked Vehicle Repairer

The tracked vehicle repairer supervises and performs field or sustainment level maintenance on tracked vehicles (other than the M1, M2, and M109 family of vehicles). Performs repair of diesel power plants/packs, compression ignition engine fuel systems, compression ignition air induction systems, vehicle air cooling systems, vehicle liquid cooling systems, tracked hull electrical systems, automatic transmission assemblies, tracked vehicle cross drive transmission assemblies, transfer assemblies, hydraulic brake systems, mechanical/hydraulic steering systems, tracked vehicle hydraulic assemblies, fire extinguisher/suppression systems.

 

91J-Quartermaster and Chemical Equipment Repairer

The quartermaster and chemical equipment repairer supervises or performs maintenance on chemical equipment, quartermaster machinery, forced air heaters, and special purpose equipment. Maintains and repairs electrical/fuel heater systems, pumps, reverse osmosis water purification systems, decontamination systems, protective filter systems, smoke generator systems, laundry washer/extractor systems and dryer/tumbler systems. Maintain internal combustion engine ignition/fuel/cooling/electrical systems.

 

91L-Construction Equipment Repairer

The construction equipment repairer supervises and performs maintenance on construction equipment which includes that used for earthmoving, grading, and compaction; lifting and loading; quarrying and rock crushing; asphalt and concrete mixing, and surfacing; water pumping; air compression and pneumatic tools; and powered bridging equipment.

 

91M-Bradley Fighting Vehicle System Maintainer

The Bradley fighting vehicle system maintainer supervises and performs unit maintenance and select on-board direct support task i.e., major assembly and LRU replacement on the Bradley fighting vehicle (BFV), M6 Linebacker, and M7 Bradley Fighting Infantry Support Team (BFIST) (hull and turret). Diagnoses and troubleshoots malfunctions and performs organizational maintenance and on-board direct support tasks on the Bradley Fighting Vehicle suspension systems, steering systems, fire extinguisher/suppression systems, gas particulate systems, vehicular mounted armament, and associated fire control systems.

 

91P-Self-Propelled Artillery System Maintainer

The artillery mechanic supervises and performs unit maintenance and recovery of all self-propelled field artillery cannon weapon systems, including automotive, turret, carriage-mounted armament, associated fire control systems, and chemical protection subsystems thereof. Duties for MOS 91P at each skill level performs unit maintenance on automotive, turret, carriage-mounted armament and associated fire control and related systems and components on the M109-series self-propelled Howitzers, M992 Field Artillery Ammunition Carrier (FAAC) and M88A1 Medium Track Recovery Vehicle. Maintains diesel power plants/packs, compression ignition engines and engine fuel systems, air induction systems, exhaust systems, cooling systems, engine starting and charging systems, track hull electrical and hydraulic systems, automatic cross drive transmission assemblies, auxiliary drive assemblies, track vehicle suspension and suspension lock out systems, mechanical/hydraulic steering and braking systems, fire extinguisher/suppression systems and gas particulate filter systems. Diagnoses malfunctions, troubleshoots and performs other unit maintenance on carriage-mounted armament, associated fire control and related systems and components on all self-propelled field artillery weapon systems.

 

91S-Stryker Systems Maintainer

The Stryker systems maintainer works as part of a team to maintain the Stryker family of vehicles and keep the vehicles and the operating systems running smoothly. Some of those vehicles include the M1128 Mobile gun system, the M1132 Engineer support vehicle, the M1133 Medical evacuation vehicle and the M1135 NBC recon vehicle. Job Duties are as listed: performs field and sustainment level maintenance on various vehicle systems to include the suspension systems, steering systems, hydraulic systems, fire extinguisher/suppression systems and vehicular mounted armament, supervises compliance with shop safety program and use, and maintenance and security of power tools, diagnoses and troubleshoots malfunctions, supervises and provides technical guidance to junior grade Soldiers and performs battlefield damage and assessment and repair.

 

91X-Maintenance Supervisor

The maintenance supervisor supervise and perform field and sustainment maintenance on tracked and wheeled vehicles, construction equipment, (which includes that used for earthmoving, grading and compaction; lifting and loading; quarrying and rock crushing; asphalt and concrete mixing and surfacing; water pumping; air compression and pneumatic tools; powered bridging and their associated trailers and material handling equipment (MHE)) and special purpose equipment maintenance activities to include: (1) Power Generation Equipment; (2) Air Conditioning/Refrigeration Systems; and (3) Quartermaster and Chemical Equipment. Perform as support maintenance machine ship supervisor or metalworking supervisor. Supervise recovery operations on track vehicles, wheel vehicles and related activities including electrical wiring harness system repair/maintenance.

 

91Z-Senior Maintenance Supervisor

The senior maintenance supervisor supervises, plans, coordinates, and directs the field and sustainment maintenance of all wheeled, tracked, armament, power generation, and utility equipment.

 

94A-Land Combat Electronic Missile System Repairer

The land combat electronic missile system repairer supervises or performs field and sustainment level maintenance on the TOW and Dragon missile systems, the Bradley Fighting Vehicle System (BFVS) and Javelin system. Perform quality control measures. Inspects, tests, adjusts components to specific tolerances. Determines shortcomings and malfunctions in electronic, electrical, mechanical, pneumatic, optical, and electromechanical assemblies, sub assemblies, modules and circuit elements, with common and system special design test equipment. Repair unserviceable items by removing and replacing defective components and parts. Repair unserviceable optical and infrared components by aligning, adjusting, removing and replacing defective modules and assemblies. Determine serviceability and disposition of defective assemblies, subassemblies, and parts. Performs maintenance adjustments and repairs on job related tools and equipment. Prepare maintenance and supply forms and reports. Serve on inspection and maintenance teams.

 

94D-Air Traffic Control Equipment Repairer

The ATC equipment repairer performs or supervises field and sustainment level maintenance and installation of ATC communication systems, navigational aid systems (NAVAIDS), and landing systems. Determine the cause and location of malfunctions, extent of faults, and category of maintenance required. Inspect equipment for faults and completeness. Repair equipment by adjusting, aligning, repairing, or replacing defective components. Tests repaired equipment to ensure compliance with technical specifications. Prepares appropriate maintenance forms and records. Prepare ATC equipment for Federal Aviation Administration (FAA) flight inspections. Maintain authorized spare parts, supply stock, tool lists, technical manuals, and instructional material.

 

94E-Radio Equipment Repairer

The Radio Equipment Repairer performs or supervises field level maintenance on radio receivers, transmitters, and associated equipment. Determine the cause and location of malfunctions, extent of faults, and category of maintenance required. Test equipment to determine operational condition. Troubleshoot to determine location, and extent of equipment faults. Repair equipment by adjusting, aligning, repairing, or replacing defective components. Tests repaired equipment to ensure compliance with technical specifications. Evacuates equipment and components to higher level repair activities based on the Maintenance Allocation Chart (MAC). Prepares appropriate maintenance forms and records. Maintain authorized spare parts, supply stock, tool lists, technical manuals, and instructional material.

 

94F-Computer/Detection Systems Repairer

The computer/detection systems repairer performs or supervises field and sustainment level maintenance and repair on microcomputers and electromechanical telecommunications equipment, Field Artillery (FA) digital devices, Global Positioning System (GPS) receivers, switchboards, telephones, associated wire instruments/equipment, night vision devices/equipment, laser and fiber optic systems, mine detection and dispensing systems, battlefield illumination devices, electronic azimuth determining devices, and nuclear, biological, and chemical (NBC) warning and measuring devices. Determine the cause and location of malfunctions, extent of faults, and category of maintenance required. Inspect equipment for faults and completeness. Test equipment to determine operational condition. Troubleshoot to determine location and extent of equipment faults. Repair equipment by adjusting, aligning, repairing, or replacing defective components. Tests repaired items to ensure compliance with technical specifications. Evacuates equipment and components to higher level repair activities based on the Maintenance Allocation Chart (MAC). Prepares appropriate maintenance forms and records.

 

94H-Test, Measurement, and Diagnostic Equipment (TMDE) Maintenance Support Specialist

Perform calibration and repair of general purpose TMDE, selected special purpose TMDE, Radiation Detecting, Indicating, and Computing (RADIAC) equipment, calibration standards and accessories. Operates and performs calibration by alignment and adjustment of electronic and mechanical components by comparing measurements of the unit under test to a known standard traceable to the National Institute of Standards and Technology (NIST). Repairs general purpose and selected special purpose TMDE to component level by removing and replacing defective components. Perform field and sustainment level maintenance on calibration standards and calibration accessories. Performs special regulatory requirements associated with the calibration, maintenance and repair of RADIAC equipment.

 

94M-Radar Repairer

The avionic communications equipment repairer performs or supervises field and sustainment level maintenance on aircraft communications equipment. Tests repaired equipment to ensure compliance with technical specifications. Evacuates equipment and components to higher level repair activities based on the Maintenance Allocation Chart (MAC). Prepares appropriate maintenance forms and records.

 

94P-Multiple Launch Rocket System (MLRS) Repairer

The MLRS repairer supervises or performs field and sustainment level maintenance on multiple launch rocket system (MLRS) M270, M270A1, and High Mobility Artillery Rocket System (HIMARS), self propelled launcher loader (SPLL) (less carrier), launcher pod/container (LP/C) trainer, and test support group. Troubleshoot SPLL and the launcher loader module (LLM) electrical, electronic, mechanical assemblies, modules and interconnecting cables to isolate malfunctions. Replaces or repairs electrical, hydraulic and mechanical assemblies, modules, and cables determined to be faulty. Uses breakout boxes and built in test equipment (BITE) for fault isolation and verification or adjustment of electrical assemblies and modules of LLM. Repairs, replaces chassis mounted components on units under test. Perform unit maintenance on system peculiar test, training, and ancillary equipment. Assist automatic test equipment (ATE) operator in fault isolating LLM electronic modules and assemblies to component level at organizational level.

 

94S-Patriot System Repairer

The Patriot system repairer performs or supervises direct and general support (DS/GS) level maintenance on the Patriot missile system, associated equipment and trainers. Performs tests and adjusts components to specific tolerances and determines shortcomings and malfunctions in electronic assemblies, subassemblies, modules and circuit elements with common and system peculiar test equipment. Isolates malfunctions using automatic and semi automatic program maintenance diagnostic software, unit self test and built in test equipment (BITE). Operates and performs unit level maintenance on standard and system peculiar test equipment.

 

 

94T-Avenger System Repairer

The Avenger system repairer supervises, performs and inspects unit level, direct support and general support maintenance on Avenger system and associated components (less carrier and communications). Perform quality control measures. Perform maintenance adjustments on test equipment. Inspects, tests, and adjusts components to specific tolerances. Determines shortcomings and malfunctions in electronic, electrical and cryogenic assemblies, modules and circuit elements using system associated equipment. Removes and replaces defective line replaceable units (LRU), including interconnecting cables. Determine serviceability, disposition of assemblies, subassemblies, and parts. Removes and installs servomotor/Azimuth Gear Assembly.

 

94W-Electronic Maintenance Supervisor

The electronic maintenance chief supervises, monitors, and directs the electronic maintenance mission of the US Army. The electronic maintenance chief performs or supervises field and sustainment level maintenance on all Army standard electronic equipment, systems, and associated devices, to include communications security (COMSEC) equipment and controlled cryptographic items (CCI).

 

94X-Senior Missile Systems Maintainer

Supervises and coordinates support maintenance on Tubular-Launched, Optically Tracked, Wire Guided Missile (TOW), Dragon, Improved Target Acquisition System (ITAS), Bradley Fighting Vehicle System (BFVS), TOW Field test Set (TFTS), Javelin, Multiple Launch Rocket System (MLRS), High Mobility Artillery Rocket System (HIMARS), Avenger, Surface-Launched Advanced Medium Range Air-to-Air Missile (SLAMRAAM), and Slew-to-Cue (STC) missile systems. Supervises and coordinates calibration and maintenance of associated missile systems test measurement diagnostic equipment (TMDE).

 

94Y-Integrated Family of Test Equipment (IFTE) Operator and Maintainer

The integrated family of test equipment (IFTE) operator and maintainer operates, performs, and supervises unit, direct support and general support (DS/GS) level maintenance on the Base Shop Test Facility (BSTF), AN/TSM 191. Performs DS/GS level electronic maintenance, adjustments, tests, fault isolation, and repairs of supported system line replaceable units (LRU), shop replaceable units (SRU), and test program sets (TPS). installs supported weapon system test program sets, initiates unit under test (UUT) procedures, isolates UUT/BSTF printed circuit board or component malfunctions, replaces defective parts/components and performs UUT/BSTF alignments and adjustments. Performs BSTF preventive maintenance checks and services (PMCS) and operational checks.

 

94Z-Senior Electronic Maintenance Supervisor

The senior electronic maintenance chief plans and directs electronic maintenance operations at all levels of command and echelons of the Army. Provides technical advice to commanders and staff concerning Army electronic maintenance and electronic logistic support matters. Write directives, policies and procedures which establish Army electronic maintenance requirements. Serve as senior staff noncommissioned officer (NCO) in electronic maintenance school.

 

 

 

This page last updated: February 22, 2019