07/08/2022Become an HVAC Professional Interested in becoming an HVAC professional or currently employed by a licensed HVAC company? Train to become a licensed journeyperson through Harford's partnership with the Heating and Air Conditioning Contractors of Maryland. Interested in becoming an HVAC professional or currently employed by a licensed HVAC company? Train to become a licensed journeyperson through Harford's partnership with the Heating and Air Conditioning Contractors of Maryland. News