Sr, senior, Service Tech, refridgeration, HVAC, refrigeration, HVAC-R, HVAC/R, diagnostic, commercial, service, install, mechanical, mechanic, apprentice, AC, field service, chiller, specialist, HVACR, supermarket, rack systems. Qualifications JOB REQUIREMENTS Education / Training AA degree from an accredited vocational technical or junior college EPA certification required Minimum 3-5 years' experience in construction HVAC, Refrigeration, or a related industry Must have ice machine and walk in experience.