1. Research Fellow, Endocrine Research Unit, Mayo Clinic and Foundation.
2. Research Associate in Anesthesiology, Mayo Clinic and Mayo Foundation.
3. Associate Professor of Medicine, Mayo Medical School.
4. Professor of Medicine, Washington University School of Medicine.
5. Professor of Anesthesiology and Physiology, Mayo Medical School.
6. Professor of Pediatrics and Associate Professor of Medicine, Mayo Medical School.