The rebranding takes effect from Monday 4th April 2016.
Grontmij was acquired in October 2015 by Sweco, which has its headquarters in Stockholm, Sweden. Sweco now has 14,500 employees, including 800 in the UK, and annual sales of £1.3bn.
Sweco UK managing director Max Joy said: “Our rebrand represents the next step of our successful integration of Grontmij into Sweco. We are Europe’s leading engineering consultancy and are already providing our UK clients with the benefits that this combined knowledge and experience brings.”
Legacy consulting businesses within Sweco now include Carl Bro, Haste, KML and JA Kirkpatrick.