Career
He became a scientific assistant for zoology at the Natural History Museum of Geneva in 1942 and was the director of that museum from 1953 to 1969. He wrote several articles about the Swiss freshwater fish species from the genus Coregonus. He has worked for the International Union for Conservation of Nature, for the Swiss nature conservation organisation Pro Natura and at the Council of Europe.
He was the president of the International Commission for the Protection of the Alps (CIPRA) from 1960 to 1968.