At the direction of supervisor, maintaining, monitoring, and performing preventive maintenance and continuous operation of all building systems including: fire/life safety, mechanical (HVAC, plumbing, controls) electrical (lighting, UPS, PDU, generators, primary switch gear, battery systems), 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 ensure proper operation of equipment. install and rebuild pumps and motors; install and rebuild air compressors; heat exchangers; replace bearings in all types of motors; replace seals on pumps; install and repair piping, valves, filters, hot water systems and associated controls; assist other mechanics and operators with major repairs and maintenance of building and equipment.