Staff fellow United States Public Health Service-National Institutes of Health, Bethesda, Maryland, 1968-1970. Postdoctoral fellow Weizmann Institute of Science, Rehovot, Israel, 1970-1972. Member staff Carnegie Institute Washington, Baltimore, 1972-1994.
Professor biochemistry and molecular biology Mayo Clinic and Foundation, Rochester, Minnesota, since 1994. Part-time professor biology Johns Hopkins University, Baltimore, 1982-1994, biophysics department, 1984-1994. Member editorial board Journal Lipid Research, 1983-1985, Journal Liposome Research, 1986-1992, Trends in Cell Biology, since 1991, Traffic, since 1999.
Member cell biology study group section National Science Foundation, 1977-1979. Visiting scientist University Sheffield, United Kingdom, 1972. Joseph Meyerhoff visiting professor Weizmann Institute of Science, 1983.
Lecturer in field.
1968 - 1970
1970 - 1972
1972 - 1994