Bell Labs, Murray Hill, New Jersey
Member, Technical Staff

Summer 1962

Institute for Advanced Study, Princeton, New Jersey
Member, School of Mathematics

1962-1963

University of Pennsylvania, Philadelphia, Pennsylvania
Assistant Professor of Physics

1963-1966

Hebrew University of Jerusalem, Israel
Guggenheim Fellow, on leave from University of Pennsylvania

1966-1967

Bar-Ilan University, Ramat-Gan, Israel
Associate Professor of Physics, 1967-74
Professor or Physics, 1974-81

1967-1981

Weizmann Institute of Science, Rehovot, Israel
Part-time consultant, Department of Electronics

1972-1981

Washington University, St. Louis, Missouri
Sabbatical leave from Bar-Ilan University

1981-1982

Iowa State University, Ames, Iowa
Professor of Physics
Senior Scientist, Ames Laboratory (USDOE)

1982-present