1. Research Fellow in Anaesthesia, Harvard Medical School, and Clinical Fellow in Anesthesia, Massachusetts General Hospital.
2. Research Study Nurse, Department of Anesthesia, Massachusetts General Hospital.
3. Associate Professor of Anaesthesia, Harvard Medical School, and Associate Anesthetist at the Massachusetts General Hospital.
4. Associate Clinical Professor of Surgery, Harvard Medical School, and Surgeon and Chief, Vascular Surgery, Massachusetts General Hospital.