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Don Gillis
HVAC Journeyman and Trainer,
Gillis Coach
Don Gillis is a licensed HVACR Journeyman under the International Mechanical Code and a trainer with Gillis Coach. With more than three decades in the HVACR industry, Don brings real field experience, a national training background, and a practical teaching style focused on helping technicians, contractors, and industry professionals build confidence and reduce mistakes.