Monitor the operation and make adjustments on refrigeration, heat exchanger, HVAC, Centrifugal Chillers, Cooling tower, VAV systems, electrical, emergency backup systems and hot water systems; monitors operation, adjusts, and maintains refrigeration, chilled water, and air conditioning equipment; boilers, and ventilating and hot water heaters; pumps, valves, piping and filters; other mechanical and electrical equipment; record readings and make adjustments where necessary to assure proper operation of equipment. Perform preventive maintenance on all base building and critical system equipment which includes but not limited to: assemble all tools, supplies and instruments necessary to complete the job, performing work with a minimum amount disruption, conducting immediate clean-up of work area, completing the work order task sheet, returning tools to workshop, and unused supplies to store room, reporting any equipment problems, impending supply or material shortages to the Chief Engineer.