BURLINGTON, Mass. — North American design firm Stantec will expand its Northeast presence with the planned acquisition of Fay, Spofford & Thorndike (FST), a 280-person Burlington, Mass.-based engineering, planning and environmental firm, according to a news release.

With nine offices in Massachusetts, New Hampshire, Maine, Connecticut and New York, FST complements Stantec’s fast growing team of 1,200 people across the Northeast.

FST brings a 100-year history of delivering vital transportation and water infrastructure, buildings design and environmental solutions for hundreds of communities and private businesses across the Northeast. The firm’s portfolio of projects includes airports, bridges, roadways, railways, marine/waterfront, water and wastewater treatment systems, trail design, and environmental services.

“FST’s recognized design excellence and commitment to local communities closely align with Stantec’s strengths,” said Bob Gomes, Stantec president and chief executive officer, announcing the acquisition letter of intent. “Together, we bring even greater resources to handle the challenges ahead, whether it’s aging infrastructure, population growth, or general community resilience.”

The acquisition is expected to close in October.

FST’s portfolio includes a span of services for major clients and local communities. Among their recent work: design of the I- 93/I-95 interchange in Canton for MassDOT; design for the $33 million Logan Express Garage and Terminal for Massport; the Plymco Mill brownfields restoration in Plymouth, Mass.; owner’s representative for runway safety improvements at Logan International Airport; design and construction administration for major facilities for the Massachusetts Water Resources Authority and the Boston Water & Sewer Commission; and design as part of a design/build team to replace the 90-year-old Turner Center Bridge between Turner and Greene, Maine.

Stantec’s current presence in New England includes 11 offices in Maine, Massachusetts, Vermont, New Hampshire and Connecticut. Stantec is one of the United States’ largest engineering and architecture firms, as ranked by national publications such as Engineering News Record and Building Design & Construction. Across the U.S., Stantec has more than 6,500 employees in 162 offices.