 In 1927–1928, he was awarded a Rockefeller scholarship to study in France and the United States, where he was in a contact with Élie Cartan and Oswald Veblen In 1929, he returned to Romania, and was appointed professor at the University of Cernăuţi.In 1939, he moved to the University of Bucharest, where he was appointed Head of the Geometry and Topology department in 1948.He retired in 1970.