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.

In 2021, DMG was acquired by EMCOR Group, Inc. (NYSE: EME), a Fortune 500® leader in mechanical and electrical construction, industrial and energy infrastructure, and building services for a diverse range of businesses. DMG has a promising future ahead, with a talented staff of over 150 people, and the vast technical resources of this best-in-class organization. Learn more about EMCOR Group here.