In the Military

Heating, air conditioning, and refrigeration mechanics and installers perform work familiar to some military personnel.

Jobs in this career are similar to the following job classifications:

  • 2A612 Aerospace Ground Equipment Helper (Enlisted)
  • 2A632 Aerospace Ground Equipment Apprentice (Enlisted)
  • 2A652 Aerospace Ground Equipment Journeyman (Enlisted)
  • 2A672 Aerospace Ground Equipment Craftsman (Enlisted)
  • 2A692 Aerospace Ground Equipment Superintendent (Enlisted)
  • 2A6X2 Aerospace Ground Equipment (Enlisted)
  • 2M013 Missile And Space Facilities Helper (Enlisted)
  • 2M033 Missile And Space Facilities Apprentice (Enlisted)
  • 2M053 Missile And Space Facilities Journeyman (Enlisted)
  • 2M073 Missile And Space Facilities Craftsman (Enlisted)
  • 2M0X3 Missile And Space Facilities (Enlisted)
  • 3E111 Heating, Ventilation, Air Conditioning, and Refrigeration Helper (Enlisted)
  • 3E131 Heating, Ventilation, Air Conditioning, and Refrigeration Apprentice (Enlisted)
  • 3E151 Heating, Ventilation, Air Conditioning, and Refrigeration Journeyman (Enlisted)
  • 3E171 Heating, Ventilation, Air Conditioning, and Refrigeration Craftsman (Enlisted)
  • 3E1X1 Heating, Ventilation, Air Conditioning, and Refrigeration (Enlisted)
  • 3E490 Infrastructure Systems Superintendent (Enlisted)
  • 120A Construction Engineering Technician (Warrant Officer only)
  • 12B Combat Engineer (Enlisted)
  • 12K Plumber (Enlisted)
  • 13B Cannon Crewmember (Enlisted)
  • 19D Cavalry Scout (Enlisted)
  • 19K M1 Armor Crewman (Enlisted)
  • 68W Combat Medic Specialist (Enlisted)
  • 881A Marine Engineering Officer (Warrant Officer only)
  • 915A Automotive Maintenance Warrant Officer (Warrant Officer only)
  • 919A Engineer Equipment Maintenance Warrant Officer (Warrant Officer only)
  • 91B Wheeled Vehicle Mechanic (Enlisted)
  • 91C Utilities Equipment Repairer (Enlisted)
  • 91J Quartermaster and Chemical Equipment Repairer (Enlisted)

The following military occupations are no longer in active use:

  • 51L Heating and Cooling Specialist (Enlisted)
  • 52C Utilities Equipment Repairer (Enlisted)
  • DC Damage Controlman (Enlisted)
  • ENG Naval Engineering Specialty (Warrant Officer only)
  • MAT Material Maintenance Specialty (Warrant Officer only)
  • MK Machinery Technician (Enlisted)
  • MSSE Marine Safety Specialist Engineer (Warrant Officer only)

The following military occupations are no longer in active use:

  • 702 Utilitiesman - Air Conditioning (Enlisted)
  • 1120 Utilities Officer (Warrant Officer only)
  • 1161 Refrigeration and Air Conditioning Technician (Enlisted)
  • 1169 Utilities Chief (Enlisted)
  • 6073 Support Equipment Electrician/Refrigeration and Engine/Gas Turbine Technician (Enlisted)
  • 6074 Cryogenics Equipment Operator (Enlisted)
  • 6499 Mobile Facility Technician (Enlisted)
  • 001797 Utilitiesman (Enlisted)
  • 003005 Steam Plant Auxiliary Systems Maintainer (Enlisted)
  • 003177 Steam Plant Auxiliary Systems Technician (Enlisted)
  • 003179 Diesel Engine Systems Technician (Enlisted)
  • 003651 Steam Plant Auxiliary Systems Manager (Enlisted)
  • 003653 Diesel Engine Systems Maintainer (Enlisted)
  • 4250 Public Works Officer (Commissioned or Warrant Officer)
  • 4260 Assistant Public Works Officer (Commissioned or Warrant Officer)
  • 6199 Conversion NEC UT Utilitiesman Basic (Enlisted)
  • 741B High and Low Pressure Cryogenic Technician (Enlisted)
  • 742B Refrigeration and Air Conditioning Systems Technician (Enlisted)
  • AS Aviation Support Equipment Technician (Enlisted)
  • B23A Shore-Based Refrigeration and Air Conditioning Technician (Enlisted)
  • B24A Advanced Utilitiesman (Enlisted)
  • EN Engineman (Enlisted)
  • F17A Support Equipment Cryogenic Mechanic (Enlisted)
  • F18A Support Equipment Air Conditioning and Mobile Maintenance Facility (MMF) Technician (Enlisted)
  • MMA Machinists Mate, Non-Nuclear, Submarine Auxiliary (Enlisted)
  • MM Machinist's Mate (Enlisted)
  • Q53A Low Pressure Electrolyzer (LPE) Operator (Enlisted)
  • U10A CG Smart Ship Engineering Control System Equipment (ECSE) Mechanical Operator and Maintenance Technician (Enlisted)
  • U14A Cryogenics Technician, Overseas Shore Based Equipment Operator/Maintainer (Enlisted)
  • U17A NAMTS Air Conditioning and Refrigeration Technician (Enlisted)
  • UT Utilitiesman (Enlisted)

The following military occupations are no longer in active use:

  • 4223 NAMTS Air Conditioning and Refrigeration (Enlisted)
  • 4228 NAMTS Air Conditioning and Refrigeration Technician (Enlisted)
  • 4245 SSN/SSBN Basic Auxiliary Equipment Technician (Enlisted)
  • 6104 Shore-Based Refrigeration and Air Conditioning Technician (Enlisted)
  • 3E111 Heating, Ventilation, Air Conditioning, and Refrigeration Helper (Enlisted)
  • 3E131 Heating, Ventilation, Air Conditioning, and Refrigeration Apprentice (Enlisted)
  • 3E151 Heating, Ventilation, Air Conditioning, and Refrigeration Journeyman (Enlisted)
  • 3E171 Heating, Ventilation, Air Conditioning, and Refrigeration Craftsman (Enlisted)
  • 3E1X1 Heating, Ventilation, Air Conditioning, and Refrigeration (Enlisted)