Dirk Lohan has decided to close his architectural office and take a leadership role with design-builder Wight and Co., with offices in Chicago and west suburban Darien, the Chicago Tribune has reported.
Lohan, 77, designed the McDonald’s Corp. headquarters in Oak Brook and developed master plans for the Soldier Field renovation, and the Illinois Institute of Technology.

He and partner Floyd Anderson, with 10 people, will join Wight & Co. to lead the “Lohan Studio” section of the firm and will be principals at the larger practice, with about 175 employees providing architecture, engineering and construction services.
The change will create “a greatly expanded portfolio … and an international reach that we haven’t had before,” said Mark Wight, Wight & Co.’s CEO. “I see opportunities and possibilities that I’ve never had,” The Tribune quoted Lohan as saying.