Repairs, overhauls, and rebuilds a variety of heavy mobile equipment/vehicles such as bulldozers, road graders, fuel dispensing trucks, mobile cranes, heavy snow removal and fire protection equipment, including their major systems, i.e., diesel, multi-fuel, and gasoline engines (including supercharged and turbocharged), automatic/manual transmissions, multi-gear assemblies, and a variety of positioning systems. The purpose of this position is to maintain, troubleshoot, overhaul, repair, and modify heavy-duty vehicles and mobile equipment which have utility systems or special hydraulic, pneumatic, mechanical, electrical., or electronic systems designed for such purposes as construction, combat, earth moving, firefighting, and comparable industrial or special applications.