Minimum Qualifications: Graduation from an accredited high school or equivalent, plus five (5) years of experience in repair and maintenance of commercial/industrial heating, ventilation, air conditioning, or refrigeration systems with chillers, including two (2) years of experience which were in the Aviation, Military, Industrial, Commercial Construction, or other large-scale commercial or utility infrastructure environments. Job Description: Purpose: Under minimal supervision, this position performs complex work including installation, maintenance, and repair of industrial and commercial heating, ventilation, air conditioning, and refrigeration systems in Department of Aviation (DOA)-owned and Austin-Bergstrom International Airport (AUS) facilities.