Performs preventative 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 of disruption, conducting immediate clean-up of work area, completing the preventative task sheet, returning tools to workshop and unused supplies to store room and advising the Maintenance Manager of any equipment problems. Monitors operation, adjusts and maintains refrigerant, heat exchangers, HVAC equipment and systems, chilled water, and air conditioning equipment; boilers, pumps, valves, piping and filters; other mechanical and electrical equipment; records readings as necessary to ensure proper operation of equipment and makes adjustments where necessary to assure proper operation of equipment and notifies appropriate parties of any problems or malfunctions.