1982-1984 Assistant Clinical Professor, SUNY Upstate Medical Center 1982-1984 Attending, Crouse-Irving Memorial Hospital, SUNY Upstate Medical Center, Syracuse, New York 1982-1984 General Internist, Syracuse Community Health Center, Syracuse, NY 1982-1984 Surgeon, Commissioned Corps, United States Public Health Service 1987- Active Staff, The Johns Hopkins Hospital 1987-1988 Director, Clinical Track of the Preventive Medicine Residency, The Johns Hopkins University School of Hygiene and Public Health 1987-1988 Instructor, Medicine, Joint Appointment Epidemiology, and Health Policy and Management, The Johns Hopkins University School of Medicine 1988-1992 Assistant Professor, Medicine, Joint Appointment Epidemiology, and Health Policy and Management, The Johns Hopkins University School of Medicine 1988- Director, The Precursors Study (A prospective study of 1,337 Johns Hopkins University Medical Students started in 1946) 1992-1997 Associate Professor, Medicine, Joint Appointment Epidemiology, and Health Policy and Management, The Johns Hopkins University School of Medicine 1994-1996 Acting Director, Division of Internal Medicine, Department of Medicine, The Johns Hopkins University School of Medicine. 1996-2002 Director, Division of General Internal Medicine, Department of Medicine, The Johns Hopkins University School of Medicine. 1996-2001 Associate Director for General Medicine, Department of Medicine, The Johns Hopkins University School of Medicine 1996-1997 Interim Director, The Welch Center for Prevention, Epidemiology, and Clinical Research, The Johns Hopkins Medical Institutions 1998 Professor of Medicine, The Johns Hopkins University School of Medicine, Joint Appointment Epidemiology, and Health Policy and Management 2000-2001 Interim Director, Department of Medicine, The Johns Hopkins University School of Medicine 2000-2001 Interim Physician-in-Chief, The Johns Hopkins Hospital 2001-2005 Vice Dean for Clinical Investigation, The Johns Hopkins University School of Medicine 2005-present Dean, Johns Hopkins Bloomberg School of Public Health
