Instructor art history U. Buffalo, 1946-1948, assistant professor, 1948-1949. Critic in residence Princeton, 1952-1953, assistant professor, bi-centennial preceptor, 1956-1960. Associate curator painting and sculpture exhbns.
Museum Modern Art, New York City, 1960-1965, curator, 1965. Professor fine arts, director Rose Art. Museum Brandeis U., 1965-1970.
Visiting professor of history art Harvard, 1969-1970. William R. Kenan, Junior professor of history art University of Virginia, Charlottesville, 1970-1974. Kress professor National Gallery Art, Washington, 1971-1972.
Exhibited one man shows Arista Gallery, New York City, 1938, Willard Gallery, New York City, 1949, 51, 53, Princeton Museum, 1949, 51, Memorial Exhibition, Bayly Museum, University of Virginia, 1975. Exhibited group shows Brooklyn Museum Whitney Museum American Art, Albright Art Gallery, Allen Memorial Art Museum, Oberlin College, Cleveland Museum, Milwaukee The Art Institute of Chicago, Columbus (O.) Gallery Fine Arts, University of Illinois Museum Modern Art. National Council Learned Socs. fellow, 1952-1953.
Fulbright fellow, 1957-1958.
Author: Claude Monet, 1960. Monet, Seasons and Moment, 1960. The Art of Assemblage, 1961.
Mark Tobey, 1962
Art Israel, 1964. The Responsive Eye, 1965.
Henri de Toulouse-Lautrec: At the Circus, 1965. San Paulo 9: Edward Hopper and Environment United States of America, 1967. Seventh Biennial Canadian Painting, 1968.
Kinetic Art, 1969