From 1910 he was a part-time employee of the Strasbourg central office of the International Seismological Association (ISA), today's International Association of Seismology and Physics of the Earth's Interior .
Ab 1910 war er nebenamtlicher Mitarbeiter des Straßburger Zentralbüros der International Seismological Association (ISA), der heutigen International Association of Seismology and Physics of the Earth’s Interior.