R&D Consulting in Baton Rouge, a 30-person engineering consulting firm serving the Gulf Coast, has been acquired by Ruston-based global professional services firm HGA.

Terms of the deal were not disclosed.

R&D Consulting was founded in 1976 as D.J. Farrow and Associates. It was purchased in 1996 by Robert Hollinger and David Eccles, who changed the name to R&D Consulting.

The company serves the petrochemical and fertilizer industries with engineering services that include structural, process, civil and electrical engineering, as well as mechanical and piping design, instrumentation services, process automation and control services.

HGA, founded in 1997 by Trott Hunt and Jay Guillot, has more than 360 employees in 12 offices throughout the U.S. and in the Middle East. Most of HGA’s revenue is also derived from engineering services provided to industrial clients. Most of the company’s work has been in the energy and chemicals sectors.

HGA has two additional business units: staffing and pipeline services.

“We are very excited about joining the HGA family,” Hollinger, R&D’s former president said. “We were pleased to see that the companies share the same values and approach to the consulting business.”

“HGA is very optimistic about the outlook in south Louisiana and south Texas,” HGA President Trott Hunt said. “We believe the large supply and low cost of natural gas is going to continue to drive a lot of activity in the chemical and manufacturing industries in the region for the next 10-plus years. This acquisition will help solidify HGA’s presence in this region.”