Performs preventive maintenance on all base building and critical HVAC system equipment which includes but not limited to: assembling all tools, performing work with a minimum amount disruption, conducting immediate clean-up of work area, completing the preventive task sheet, returning tools to workshop, and unused supplies to store room, reporting any equipment problems, impending supply or material shortages to the Operations Manager. Monitor the operation and make adjustments on: refrigeration, heat exchanger, HVAC, hot water systems, floor radiant heating systems, chilled water, and air conditioning equipment, boilers, heating and ventilating equipment, domestic water heaters, pumps, valves, piping and filters, other mechanical equipment, record readings and make adjustments where necessary to assure proper operation of equipment.