The essential functions include, but are not limited to the following: Maintains, diagnoses, repairs, inspects, assembles, and rebuilds equipment across the following categories: Engines and powertrain systems: diesel and gasoline engines, including Cat, DDEC, MTU, Cummins, Perkins, and Mack; transmissions, including Allison 4700 OFS and 6000 series; gear boxes, PTOs, chassis, suspension, rims, tires, and wheels. Rig, pump, and pressure-control equipment: workover rigs, including late-model 300 hp to 600 hp rigs; high-pressure pumps rated 0–3,000 psi, 0–5,000 psi, and 0–10,000 psi; centrifugal pumps; mud pumps; fluid ends; power ends; drum brakes; draw works; swivels; laydown machines; wellhead and supporting equipment.