Company History

Founded in 1982 in Sioux Falls, South Dakota, as an independent testing laboratory, ATC Group Services LLC has since greatly expanded our offerings and reach, growing alongside our clients and acquiring companies that complement our mission. After our first round of acquisitions in 1991, we moved our headquarters to Woburn, Massachusetts. We have been headquartered in Lafayette, Louisiana, since 2009.

In 2012, ATC merged with the global company Cardno, but only briefly. Just three years later we broke from Cardno and were acquired by a group led by Bernhard Capital Partners Management LP to serve as the core of its environmental services portfolio.

In 2016, we acquired Sage Environmental (now Sage ATC) and Dexter Field Services (now Dexter ATC Field Services), expanding our multidisciplinary offerings to include air quality consulting. We also completed the acquisition of multi-regional Environmental Compliance Services (ECS) that same year, growing our company to more than 1,900 employees and 115 office locations.

Celebrating 35 Years Badge
“Celebrating 35 Years” – View the ATC History Video