Repairs, overhauls, and rebuilds a variety of heavy mobile equipment/vehicles such as bulldozers, road graders, power shovels, mobile cranes, heavy combat equipment, and missile transporters, 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. Knowledge of technical practices in order to repair/overhaul major systems (i.e., diesel, multi-fuel, and gasoline engines, automatic and manual transmissions, multi-gear assemblies, and a variety of positioning systems) and to remove, replace, clean, and install a variety of parts, components, and accessories (i.e., wheel cylinders, universal joints, springs, shock absorbers, catalytic converters, clutch assemblies, mufflers, etc.).