Montrose Environmental Group, Inc. is pleased to announce it has acquired Professional Environmental Services, Inc. Terms of the transaction were not disclosed.
Formed in 2002, Professional Environmental Services, Inc. is an environmental engineering and consulting firm specializing in air quality services. Professional Environmental Services, Inc. is based in Irwindale, CA.

Jose Revuelta, Vice President, Corporate Development of the Montrose Environmental Group, added, “We are extremely pleased to have Professional Environmental Services, Inc. join the Montrose Group. This is consistent with our strategy, and this acquisition increases our presence in the Southwestern United States.”

About Professional Environmental Services, Inc.

Professional Environmental Services, Inc. is dedicated to providing clients with high quality cost-effective air pollution engineering, emissions testing and consulting services to comply with environmental rules and regulations. Services routinely offered by PES, Inc. include emissions inventories, preparation of applications for air quality permits, compliance audits, expert testimony, source testing, ambient monitoring and air quality special studies. For more information, visit

About Montrose Environmental Group, Inc.

Montrose Environmental Group, Inc. is a national, high-growth environmental company offering Air Quality and Environmental Laboratory services to a diverse range of clients in industry and government. Headquartered in Orange County, California, Montrose Environmental Group, Inc. has 23 offices and approximately 375 employees nationwide. For more information, visit