He was Secretary to the International Mathematical Union from 1956 to 1961, President of the Swiss Mathematical Society in 1961-62, and a member of the research Council of the Swiss National Science Foundation from 1964 to 1984.
Siya ay Kalihim sa International matematiko Union 1956-1961, Pangulo ng Swiss matematiko Kapisanan sa 1961-62, at isang kasapi ng pananaliksik Konseho ng Swiss National Science Foundation 1964-1984.