Requirements. HVAC / Refrigeration - 7 to 10 years recent commercial experience in the field working. Service Technician - 7 to 10 years in the field (not managing buildings) recent commercial experience. Ability to service, repair, diagnose, troubleshoot, and test commercial HVAC / Refrigeration equipment. Skilled at servicing and maintaining DX units. Set up and install package units / split systems. RTU and AHU experience. Looking for someone ...