William joined Grimshaw in 1995 in London. He moved to the New York office in 2003 and became a Partner in 2010. Early Grimshaw project involvement included an inventive structural solution for the Ludwig Erhard Haus Berlin Stock Exchange; designs for the Manchester International Airport and the internationally-renowned Eden Project in Cornwall, UK, considered the most innovative and high profile of the Millennium Projects.

While working in London William was a key designer on the Donald Danforth Plant Science Center in St Louis, Missouri, Grimshaw’s first project in North America. Once in New York he joined the Experimental Media and Performing Arts Center team.