The utilities OccFld includes Marines who install, operate, and maintain water supply, plumbing, heating, sewage, mobile electrical power generating sources, electrical distribution systems, air conditioning, refrigeration, hygiene utilities systems, and perform fabric repair.

US Marines entering the utilities field are assigned MOS 1100, Basic Utilities Marine, and are provided formal schooling to qualify for one of the designated MOSs within the OccFld.

Later in the Marine’s career, advanced formal schooling may be provided leading to assignment as a utilities chief. The opportunity to participate in a formal apprenticeship program leading to receipt of a Department of Labor Certificate of Apprenticeship Completion may be available in some MOSs within OccFld 1100; refer to MCO 1550.22 for specific information concerning this program.

There are a wide variety of challenging and interesting billets available to US Marines in OccFld 11, ranging from duty in engineer battalions and staff levels of the division, air wing, and force service support groups, to duty in one of the various category “B” billets (MOSs 8000-9599).

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