System One, a Pittsburgh-based IT and engineering staffing provider, acquired RPG Resources, a diverse environmental services company also based in Pittsburgh.

RPG Resources provides inspection engineering and environmental solutions which align with and complement System One’s outsourced services to the oil and gas, renewable energy, telecom, transmission and distribution, and utility services sectors.

The transaction closed on Jan. 23; terms were not announced. There will be no changes to RPG Resource’s leadership team. RPG Resources will maintain its brand and work in collaboration with System One with the intent to integrate the businesses over time.

“RPG’s environmental services are highly complementary to so many System One capabilities and relationships,” said Phil Kurello, managing partner at RPG Resources. “We are extremely excited about the many opportunities for continued growth and success this partnership will deliver to our valuable employees and customers.”

System One is the second-largest engineering staffing firm in the US, according to SIA research. It provides specialized, highly technical outsourced services and workforce solutions to critical infrastructure, technology, life sciences and government sectors. It operates in more than 50 locations in the US, Canada and the UK.