The CBRN specialistconduct CBRN reconnaissance and surveillance; perform decontamination operations; conduct obscuration operations; conduct CBRN sensitive site exploitation; and operate and perform operator maintenance on assigned CBRN defense and individual CBRN protective equipment. Additionally, in non-chemical units, the CBRN NCO plan, conduct and evaluate individual and collective CBRN training, and provide technical advice on all CBRN operations and hazards for company and higher-level organizations.

Boatswain's Mates (BM) train, direct, and supervise personnel in ship's maintenance duties in all activities relating to marlinespikes, decks, boat seamanship, painting, upkeep of ship's external structure, rigging, deck equipment, and life boats; take charge of working parties; perform seamanship tasks; act as petty officer-in-charge of picket boats, self-propelled barges, tugs, and other yard and district crafts; and operate and maintain equipment used in loading and unloading cargo, ammunition, fuel, and general stores.

Perform duties as assistants in the prevention and treatment of disease and injury; including first aid and preventive medicine procedures; assist with physical examinations; provide patient care and the administration of medicinals and parenteral solutions; perform general laboratory, pharmacy and other patient support services; assist in the administrative supply and accounting procedures within medical departments ashore, afloat and with the Marine Corps; instruct medical and non-medical personnel in first aid, self aid, personal hygiene and medical records maintenance and assist in the transportation of the sick and injured; assist in the maintenance of environmental health standards; be prepared to assist in the prevention and treatment of chemical, biological and radiological (CBR) casualties and other contingencies; senior hospital corpsmen perform supervisory, technical, planning and management functions in support of medical readiness and quality health care delivery; In addition to their general assignments, hospital corpsmen trained as technicians perform specialized functions within the operational forces, clinical specialities, administrative departments and may be assigned independent of a medical officer.