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 your supervisor.