DMG came into existence after the seller of an established Dallas-based mechanical contracting firm backed out at the last minute. Undeterred, John & Joe Smith launched DMG as a start-up with a handful of employees, a few trucks and a small office.

Since then, DMG has grown into one of the largest, most respected HVAC names in Texas, with vast experience serving a multitude of industries. Our reputation for the honest and ethical way we treat our customers has attracted outstanding senior-level people from competing companies.

Today, DMG is 100% debt-free and privately held. With a staff of more than 150 people, and with a promising future ahead, our story has just begun.