1906: Teacher at the religious society Beis Hamidrasj in Amsterdam.
1912: Assistant Rabbi of the Dutch Israelite Main Synagogue of Amsterdam
(under Rabbi A.S. Onderwijzer)
1928: Vice-chairman of the SA Rudelsheim Foundation in Hilversum for mentally handicapped Jewish children
1934-1940: Opperrabbijn Amsterdam (1934-1935, along with Rabbis Ph. Coppenhagen and G. de Lange)
