The acquisition will strengthen NTG’s environmental and regulatory services, enabling access to improved oilfield support and comprehensive solutions to its 400 operators across the world.

NTG president Larry Cress said resources from both the companies will enable NTG to strategically expand its expertise and offerings to best serve its clients.

"The newly combined management team has the vision and the know how to build on the success of the two companies and further uphold NTG as the preeminent people company in the oil and gas community," Cress added.

CEG president Deborah Carr said, "Combining capabilities allows our company to provide a full spectrum of solutions to include air quality, environmental permitting and planning, environmental site assessments, remediation and site closure and engineering and regulatory compliance."

NTG said its engineering staff and independent consultants provide support, knowledge and resources to onshore, offshore and deepwater operations.

CEG has been providing comprehensive and integrated environmental solutions to help clients meet regulatory requirements, manage liabilities, and minimize costs over the lifecycle of a project.