Student, University London Extension, 1934-1935.
Freelance documentary photographer and filmmaker, London, 1935-1938; film cameraman, Bhavnani Prodns., Bombay, India, 1938-1939; free lance photographer and filmmaker, Bombay, 1940-1944; documentary film director, staff captain, British Directorate of Kinematography, Bombay, 1944-1947; instructor film and photography, Institute Design, Chicago, 1947-1948; photographer and filmmaker, Container Corporation American, Chicago, 1949-1951; photographer, Berko Photography, Aspen, Colorado, since 1951; associate photographer, Aspen Institute Humanistic Studies, since 1949; photographer, Aspen Skiing Corporation, 1949-1985; photographer, Museum Association Aspen, 1949-1982; selected portrait photographer cabinet ministers' photographs, Carter Administration, 1980. Invited guest photography symposium National Museum Photography, Film and television, Bradford, England, photographs of Guadeloupe, Martinique, Switzerland, Federal Republic Germany, other countries.
Member Doctor Albert Schweitzer Foundation (honorary committee member).
Married Mirte Hahn-Beretta, November 5, 1937. Children: Nora, Gina.