Wissenschaftliche assistant Biozentrum der Universitat Basel, Switzerland, 1975-1977. Postdoctoral research associate department of anatomy Duke University Medical Center, Durham, North Carolina, 1977-1978. Research assistant professor department biochemistry and biophysics University Pennsylvania, Philadelphia, 1978-1984, research associate professor department biochemistry and biophysics, 1984-1986.
Associate professor department biology San Diego State University, 1986-1988, professor department biology, since 1988. Member BBCB study section National Institutes of Health, Bethesda, since 1988.
1975 - 1977
1977 - 1978
1978 - 1984