refrigeration mechanics install, inspect, test, maintain, and
repair aircraft support equipment (SE), electrical/instru-
ment and refrigeration and air conditioning equipment,
systems, and accessories.
See Electricians on p. 62
See HVAC Mechanics and Installers on p. 67
1120 Utilities Officer (III) (Marine Corps –
Warrant Officer)
The utilities occupation includes technical warrant officers
who plan, supervise, and coordinate activities of Marines
in various MOSs who install, operate, and maintain water
supply, heating, mobile electrical power generating
sources, electrical distribution systems, air conditioning,
refrigeration, and hygiene utility systems. There are a wide
variety of challenging and interesting billets available to
warrant officers in Occupational Field 11, ranging from
duty in battalions and squadrons of the division, air wing,
and force service support groups to instructor duty at the
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