Master of Arts, Princeton University, 1962; Doctor of Philosophy, Princeton University, 1964.
Postdoctoral fellow University Florida, Gainesville, 1964-1966. Assistant professor Georgia Institute of Technology, Atlanta, 1966-1969. Associate professor University South Florida, Tampa, 1969-1973.
Professor biology University Heidelberg, Germany, 1973-1984, University Amsterdam, The Netherlands, 1984-1996. Head department Institute Plant Genetics and Crop Plant Research IPK Gatersleben, Germany, since 1996.
Married Hanna Wieneke, August l, 1975. Children (by previous marriage) Christophe, George.