Oversees and monitors the operation and makes adjustment of refrigeration, heat exchanger, HVAC, 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. Performs preventive maintenance on all base building and critical system equipment which includes but not limited to: assembling all tools, supplies and instruments necessary to complete the job, performing work with a minimum amount disruption, conducting immediate cleanup of work area, completing the preventive maintenance tasks, returning tools to workshop, and unused supplies to store room, reporting any impending supply or material shortages for ordering and advising the Property Manager of any equipment problems.