Diagnose, service, and maintain HVAC equipment including small and large split systems, small and large packaged units, large air handling units, mini-split systems, Variable Air Volume (VAV) systems and fan-powered boxes, Exhaust fans and ventilation systems, Self-Contained units and CRAC units, Water-source heat pumps, VRF/VRV systems, Boilers, cooling towers, and pumps. Perform major mechanical repairs including replacement of large motors and compressors, bearing replacement in motors, air handlers, and cooling towers, laser alignment of pumps and rotating equipment.