Lead and perform all maintenance, service and overhauls activities on air cooled chillers; valves, bearings, gear assembly, fans, pumps, motors, air compressors, pneumatic systems, refrigerant purge units; refrigerant condensers and various types of compressors; variable frequency drives, differential pressure switches, programmable controllers; starters, control panels; and all equipment related to chilled water and HVAC. HVAC mechanical equipment includes, but not limited to, low and high-pressured water-cooled centrifugal chillers; air cooled chillers featuring reciprocating, scroll and screw compressors; purge units, cooling towers, pumps, gear assemblies, fans, filtration systems, valves, air compressors, air cooled condensers and roof top units.