Utilities In the Utilities career field, you'll maintain large heating and cooling systems, install and repair refrigeration equipment, or provide enough water and electricity for a small city.Without you, the Marine Corps could not keep things running smoothly. Areas of study include water purification, principles of refrigeration, air conditioning/heat transfer theory and application, or electrical theory and application. Once your training is complete, you will become a Hygiene Equipment Operator, Plumbing and Water Supply Specialist, Refrigeration Mechanic, or an Electrician. (OF 11) |