Performs preventive maintenance duties on air handling units, motors, exhaust fans, fan coil units, DX (Direct Expanse) units, PTAC (Package Terminal Air Conditioner) units, window units, RTU (Roof Top Units), cooling towers, and generators, totaling over 500 units. This position provides skilled installation, maintenance and repair on heating, ventilation, air conditioning and refrigeration units in large office buildings, hospitals and multi-building complexes.