Member and Officer in Scientific Societies
American Physical Society 1946-1970
Sigma XI  1948- 66 and 1987-92
New York Academy of Science 1956-60
American Association for the Advancement of Science 1993-
Member Magnetism Commission of Union of Pure an Applied Physics  1973-4
President of the Physical Society of Israel (twice)
Colloque Ampere 1960- Officer 1984-85
Chairman of Institute of Science and Halacha 1965-69
European Physical Society 1960- 1982
Fellow of the American Association for the Advancement of Science 1997