Stantec, a sustainable design and engineering company, agreed to acquire Environmental Systems Design, an engineering firm. Financial terms were not disclosed. “Merging talent with ESD positions Stantec as one of the top integrated design firms in the US market. Our expanded services in data center, smart building design, and high-performance buildings will offer our clients the flexible and stable facilities that meet their operational needs into the future,” Leonard Castro, Stantec Executive Vice President.