A Bangor-area engineering and environmental services firm has expanded into southern Maine with the acquisition of a Saco competitor.

CES Inc. of Brewer announced the acquisition of Mohlin & Co. on Monday.

Mohlin & Co. is a consulting engineering firm that specializes in structural engineering, according to a news release from CES announcing the sale. Robert “Bob” Mohlin, owner and president of Mohlin & Co., founded the firm in 1982 to offer design services to the power, industrial and commercial industries.

“We are very pleased to welcome Bob and his staff to the CES team. We believe that both clients of Mohlin and CES will benefit from this acquisition,” said CES President and CEO Denis St. Peter. “By supplementing our structural engineering services with very experienced structural engineers and junior engineers and drafters at Mohlin, we are adding additional depth to the services we provide.”

The acquisition gives CES its first southern Maine location, augmenting the company’s five other branches in Lewiston, Machias, Presque Isle, Waterville and Bar Harbor.

Counting the seven Mohlin & Co. staff members, CES now employs about 70 people, many of them engineers, environmental scientists and land surveyors.

Mohlin will continue to serve clients from its Saco location as Mohlin & Co., a division of CES Inc.