US Department of Defense - - Responsibilities: Troubleshoot, repair, modify and maintain a variety of construction, industrial, combat, tactical, and power generation equipment.; Repair and replace components of the cooling, braking, exhaust, power train, or hydraulic systems on combat and tactical, automotive, and powered support equipment.; Remove, adjust, or replace defective or worn parts and components.; Perform operational inspections and ensure vehicles are properly serviced and repaired.; Perform preventative maintenance checks and services.