Essential Duties and Responsibilities Perform installation, inspection, troubleshooting, repair, and replacement of HVAC/R equipment, including air handlers, rooftop units, split systems, chillers, boilers, exhaust fans, unit heaters, and ventilation systems in MATA facilities. The HVAC Technician is responsible for installing, maintaining, and repairing heating, ventilation, air conditioning, and refrigeration (HVAC/R) systems that serve MATA’s facilities, including bus and trolley maintenance garages, transit centers, and administrative buildings.