1. Associate Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
2. Assistant Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
3. Clinical Research Coordinator, Department of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
4. Instructor in Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
5. Senior Chemist, Chemical Development Laboratories, Wellcome Research Laboratories, Burroughs Wellcome Co.
6. Head, Anesthesia/Analgesia Section, Department of Clinical Neurosciences, Division of Clinical Research, Wellcome Research Laboratories, Burroughs Wellcome Co.
7. Associate Director of Cardiovascular, Autonomic and Biochemical Pharmacology, Wellcome Research Laboratories, Burroughs Wellcome Co.