Architect and son of Karl Moser. He studied architecture under his father in Zurich and Paul Bonatz in Stuttgart. After graduating in 1919, he worked with Marinus Jan Granpré Molière in Holland and Frank Lloyd Wright in the United States. With Rudolf Graber and Sigfried Giedion, he founded Wohnbedarf to promote modern furniture and design, including Breuer’s aluminum chairs. Moser was a founding member of CIAM (Congrès internationaux d'architecture moderne) and was involved with the Neubühl housing project, one of the first modernist housing estates in Switzerland. He was also an influential teacher, first at Harvard University and later at the Eidgenössiche Technische Hochschule in Zurich.