The Marine Corps separates its jobs, or Military Occupational Specialties (MOS), into career fields. The USMC 61 Field is a group of military jobs related to helicopter maintenance and mechanics. The jobs in this field include:
Repairing and maintaining systems and components associated with helicopter blades, motors, hydraulics, and landing
Helicopter/tiltrotor mechanics
Marines start as basic aircraft maintenance crew and then progress through hard skill MOSs. Other jobs in the aircraft maintenance field include:
Helicopter power plants mechanic
Airframe mechanic
Fixed-wing aircraft mechanic
Unmanned aerial vehicle mechanic