Independently respond to service requests requiring diagnosis and repair of various building infrastructure, such as air handling units, fan coil units, roof top equipment, heat pumps, cooling towers, chillers, terminal boxes, refrigeration systems, air compressors, pumps and other HVAC equipment using specialized knowledge of HVAC theory and practice. Independently perform and complete regularly scheduled preventive maintenance to various mechanical building infrastructure, such as pumps, air handling units, roof top units, heat exchangers, vacuum systems, motors, fans, cooling towers, chillers, electronic and pneumatic controls, radiators and other HVAC equipment.