Instructor fine arts New York University, 1934-1939. From assistant professor art to professor Queens College, 1939-1957. Professor fine arts New York University Graduate School, 1957-1974.
Director Museum Primitive Art, New York City, 1957-1963, chairman administrative committee, 1963-1973. Editor Magazine of Art, 1947-1953, Carnegie fellow, 1930-1931. Guggenheim fellow, 1944-1945.
Fulbright scholar, 1950-1951.