Equipment and System Types: Influent and effluent, tanks, pumps, sumps, piping, valves, filters, presses, blowers, compressors, dryers, condensate, cooling, oil, electrical, pressure relief, meters, dials, gauges, and safety devices. Overview: The Wasterwater Operator Mechanic is responsible for the (MRO) maintenance, repair, operation, and inspection of assigned facility processes, structures, compressor stations and plant utility areas such as water, air, and nitrogen.