He was president of the London Mathematical Society from 1922 to 1924, having been awarded the Society's De Morgan Medal in 1917, and president of the International Mathematical Union from 1929 to 1936.
Siya ay presidente ng London matematiko Society 1922-1924, pagkakaroon na iginawad ang Kapisanan ng Mula Morgan medalya sa 1917, at president ng International matematiko Union 1929-1936.