Alliance Acquires O’Brien & Gere / Ramboll’s Air Testing and Monitoring Division

Align Capital Partners’ (“ACP”) environmental testing and compliance platform Alliance Technical Group, LLC (“Alliance” or the “Company”) has acquired the air testing and monitoring assets of O’Brien & Gere, a division of Ramboll (“Ramboll Air Testing and Monitoring”).  Ramboll Air Testing and Monitoring provides source emission (or stack) testing and ambient air monitoring services to customers throughout the Northeastern and Midwestern United States.

Located in New York, Ramboll Air Testing and Monitoring strengthens Alliance’s presence in the Northeast, and builds upon the success of the Pennsylvania-based Blue Mountain acquisition in November 2020.

“The Ramboll Air Testing and Monitoring team brings additional talent and expertise to our complex source testing and ambient air monitoring teams,” said Alliance CRO Scott Williams.  “The opportunity to leverage Ramboll’s experienced field technicians with our existing customer base will expand our resource pool and increase our footprint in a key geography.”

With a national footprint and more than 700 employees, Alliance has the geographic reach and technical expertise to serve a diverse range of end markets.  This acquisition represents the Company’s 10th since 2015 and third of 2021.  Alliance will continue to evaluate additional acquisition targets for its growing platform.

“Ramboll Air Testing and Monitoring is an exciting growth opportunity for Alliance as it deepens the Company’s ambient air monitoring services,” said ACP Managing Partner Rob Langley.  “CEO Chris LeMay, Scott, and the Company’s talented employees continuously work hard to solidify Alliance as the United States’ leading, full-service provider of environmental compliance services primarily focused on air emissions testing.”

Operating Partner Dave Perotti, Principal Jack Parks, and Associate Chris Collins worked alongside Mr. Langley on the transaction.

About Alliance Technical Group
Headquartered in Decatur, AL, Alliance is the leading provider of air emissions testing and monitoring solutions to customers throughout the United States.  With expertise in a variety of end markets, Alliance is focused on people, process, and technology to provide unparalleled response and service to assist customers with meeting their air compliance and risk reduction goals.  For more information, please visit or