A Lowell-based energy and environmental consulting firm will finance its acquisition of a Tulsa, Oklahoma-based firm with a $175 million credit facility from Citizens Bank.

TRC Cos., which provides engineering, environmental consulting and construction management services to the energy, environmental and infrastructure markets, will use the credit facility to complete its $130 million acquisition of the professional services business segment of Willbros Group.

Citizens Bank was the sole lead arranger on the deal.