1. Senior Research Scientist.
2. Postdoctoral Fellow, Department of Anesthesiology.
3. Assistant Professor, Department of Anesthesiology and Department of Pharmacology and Toxicology.
4. Professor of Pharmacology and Toxicology, Department of Pharmacology and Toxicology.
5. Professor of Pharmacology and Toxicology, Department of Pharmacology and Toxicology, Professor and Vice Chair of Anesthesiology, Department of Anesthesiology.
6. Professor of Pharmacology and Toxicology, Department of Pharmacology and Toxicology, Professor and Chairman of Anesthesiology, Department of Anesthesiology, Medical College of Wisconsin.