Repairs, maintains, troubleshoots and performs preventative maintenance and repairs of equipment such as; walk-in freezer/refrigerator, reach-in freezer/refrigerator, air handler system (exhaust ventilation, return air systems), direct expansion package system, split systems, water treatment of open and closed loop systems, cooling towers, circulating pumps. NON-CERTIFIED ENGINEER: In a safe and efficient manner, determines the sequence required to install, maintain, adjust, modify and perform major overhaul and repair of air conditioning, refrigeration, heating and ventilating systems, such as; absorption heater/chiller, centrifugal chiller, ice makers, walk-in freezer/refrigerator, carbon monoxide monitoring system.