DCs perform organizational and intermediate level maintenance and repair of damage control equipment and systems. DCs also instruct and coordinate damage control parties and instruct personnel in the techniques of damage control and CBR defense. They additionally supervise and perform tasks in procurement and issuance of supplies and repair parts and prepare records and reports . HMs perform duties as assistants in the prevention and treatment of disease and injury, including first aid and preventive medicine procedures. They assist with physical examinations, provide patient care, and distribute medication.
HMs perform general laboratory, pharmacy, and other patient support services.
They assist in the administrative supply and accounting procedures with medical departments ashore, afloat, and with the Marine Corps. HMs are also prepared to assist in the prevention and treatment of CBR casualties and other contingencies. EMs operate and perform organizational and intermediate maintenance on power and lighting circuits, electrical fixtures, film projectors, motors, generators, voltage and frequency regulators, controllers, distribution switchboards, and other electrical equipment. EMs test for short circuits, grounds, and other casualties. They also rebuild electrical equipment, including solid state circuitry elements, in an electrical shop.