The Marine Corps 1371 MOS is a Combat Engineer. Combat Engineers are responsible for building, repairing, and maintaining buildings, roads, and power supplies. They also use heavy machinery to clear minefields.
Combat Engineers have a primary military occupational specialty (PMOS). They are open to Marines between the ranks of private and master gunnery.
Combat Engineers have a variety of responsibilities, including:
Conducting engineer reconnaissance
Emplacement of obstacle systems
Conducting breaching operations
Using demolitions in construction projects
Using rigging devices and equipment to lift and move heavy objects and equipment
Combat Engineers are often under fire while they make repairs.