The incumbent, at a minimum, must be able to diagnose, maintain, repair, and modify the following systems: Transmission and drive trains, suspension, engine and emission systems, including fuel injection systems, hydraulic systems, brakes including air, electrical for light and heavy-duty equipment. Incumbents are required to make repairs to gasoline and diesel engines, identify all parts and materials needed for jobs, identify and order from parts manuals through the local parts depot, and document their time and materials on workorders.