The Marine Corps Military Occupational Specialty (MOS) system categorizes career fields. MOS 62 is the occupational field for fixed-wing aircraft maintenance and mechanics. Marines in this MOS are trained to repair, inspect, and maintain airframe components on specific fixed-wing aircraft.
Some examples of MOS 62 include:
MOS 6216, Fixed-Wing Aircraft Mechanic, KC-130
MOS 6257, Fixed-Wing Aircraft Airframe Mechanic, F/A-18
Marines start as basic aircraft maintenance crew and then progress through hard skill MOSs.