| 2001-present | Professor, Department of Biology, Portland State University. |
| 1993-2001 | Professor, Department of Biochemistry and Molecular
Biology, OGI School of Science & Engineering, Oregon Health & Science University (Department Head, 1993-1996). |
| 1980-1981 | Visiting Professor, Laboratory of Physical Chemistry, The Norwegian Institute of Technology, Trondheim, Norway. |
| 1971-1993 | Associate Professor, then Professor, Department of Pharmacology, Medical College of Ohio. |
| 1965-1971 | Instructor, then Assistant Professor, Department of Gynecology and Obstetrics, The Johns Hopkins University School of Medicine. |
| 1961-1965 | NIH Postdoctoral Fellow, Department of Pharmacology
& Experimental Therapeutics (G.H. Mudge and I.M. Weiner) and Department of Biophysics (M. Larrabee), The Johns Hopkins University. |
| 1958-1961 | Predoctoral Fellow, Department of Pharmacology &
Experimental Therapeutics (G.H. Mudge and I.M. Weiner), The Johns Hopkins University. |
| Medical Pharmacology: | Anesthetics, Antidepressants, Antipsychotics |
| Graduate courses: | Bioenergetics, Membrane Transport, Thermodynamics in Biomedical Research |
| Fall 1998 | BMB 596 Molecular Biology/Biochemistry Student Seminar (with G. Woldegiorgis) |
| Spring 1999 | BMB 529 Biochemistry III: Metabolism and Bioenergetics (with G. Woldegiorgis and V. Renganathan) |
| Winter 2000 | BMB 596 Molecular Biology/Biochemistry Student Seminar (with G. Woldegiorgis) |
| Spring 2000 | BMB 529 Biochemistry III: Metabolism and Bioenergetics (with G. Woldegiorgis and M. Ralle) |
| Winter 2001 | BMB 532 Bioenergetics and Membrane Transport (with P. Paucek) |
| Spring 2001 | BMB 529 Biochemistry III: Metabolism and Bioenergetics (with G. Woldegiorgis and M. Ralle) |
| Winter 2002 | BMB 596 Molecular Biology/Biochemistry Student Seminar |
| Spring 2002 | BMB 529 Biochemistry III: Metabolism and Bioenergetics (with G. Woldegiorgis) |