In 2008, PMK Group (PMK), a recognized leader in the public and private sector providing energy, environmental engineering and consulting services since 1986, was acquired and became BSG’s fifth specialty engineering firm. PMK provided environmental engineering and remediation services for landfills and Brownfield sites throughout New Jersey, in addition to providing geotechnical engineering and waste management services. PMK was also a leader in providing energy and sustainable consulting services, which help their clients manage rising energy costs while also identifying energy alternatives.
For decades PMK was a trusted advisor, serving clients throughout the Northeast Corridor with high quality design and engineering excellence.
PMK was continually ranked as a leading firm in such publications as ENR (Engineering News Record), Zweig White, New York Construction News, and NJ Biz (Business News New Jersey). In addition, they also received numerous awards for excellence in structural, civil, environmental, and MEP engineering.
On June 21st, 2013, Partner Engineering and Science, Inc. (Partner) finalized the acquisition of most of the assets of Birdsall Services Group (BSG) as part of its planned growth and expansion in the tri-state area. The purchase includes BSG’s accounts receivable, physical assets, select contracts, existing project files, select intellectual property, and license agreements.
In order to most effectively answer your questions and provide information, please contact us at 732-945-4077 or [email protected].

July 02, 2026
Adrienne Perez, an Environmental Due Diligence Consultant, joins as Technical Director for Agency Services in Partner Engineering and Science's environmental service line.

June 23, 2026
For commercial real estate owners, developers, and investors, the program offers a more flexible and efficient path to address contamination, particularly at lower-priority sites enrolled in voluntary cleanup.

June 24, 2026
Amid evolving and often uncertain federal regulations, state environmental agencies have increasingly taken the lead in developing policies to address PFAS.




