Refrigeration mechanics and installers perform work familiar to some military personnel.

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

915A
Automotive Maintenance Warrant Officer (Warrant Officer only)
919A
Engineer Equipment Maintenance Warrant Officer (Warrant Officer only)
91C
Utilities Equipment Repairer (Enlisted)

The following military occupations are no longer in active use:

51L
Heating and Cooling Specialist (Enlisted)
52C
Utilities Equipment Repairer (Enlisted)