Must possess extensive knowledge for the maintenance of Heating, Ventilating, Air Conditioning and Refrigeration Systems (HVACR) not limited to but including chilled and hot water systems, direct expansion systems, low temperature coolers and freezers, pumps, automatic control valves, and direct digital control systems. Develops and tracks preventative maintenance schedules for HVAC equipment (chillers, boilers, air handling units, exhaust fans, kitchen hoods, pump strainers, valves, etc.) and plumbing system components (grease traps, lift stations, roof drains, sanitary water lines and storm collection basins).