Must demonstrate ability to efficiently operate all equipment in the facility which may include pumps, engines, centrifuge, generators, valves, gates, mixers, conveyors, blowers, dryers, chemical feed, odor control, disinfection equipment, sludge processing filters, belt presses and measuring/control devices, testing equipment, and material handling equipment. Tends automatic and semi-automatic machines and related equipment including pumps, engines, generators, valves, gates, mixers, conveyors, blowers, chemical feed and odor control and vacuum filters used to decontaminate wastewater by settling aeration and sludge digestion.