Some duties may require the use of protective equipment, which can include hard hats, safety glasses, and eye protection, air masks/respirators, ear protection, chemical suits, flame-resistant clothing (FRC), hot gloves, high-voltage protective gear, and fall protection. Hands-on knowledge of mechanical and electrical systems, including pumps, compressors, valves, bearings, seals, couplings, piping, switchgear, motors, motor control centers, transformers, variable frequency drives, and electrical distribution equipment.