Resident department family medicine University Washington, Seattle, 1979-1982. Clinical director Alaska Native Hospital, Kotzebue, 1982-1985. Pew Health Policy fellow Institute for Health Policy Studies, University California School Medicine, San Francisco, 1985-1987.
Epidemic Intelligence Service officer National Center for Prevention Services, Centers for Disease Control, Atlanta, 1987-1989. Legislation assistant on health issues to Senator John Chafee, United States Senate, Washington, 1991. Assistant to director for external relations, 1989-1990.
State epidemiologist, director epidemiology and prevention branch Division of Public Health, Georgia Department of Human Resources, 1993-1997, director Atlanta, 1997—2005. Director coordinating center health promotion Center for Disease Control and Prevention, since 2005. Adjunct associate professor in epidemiology Rollins School of Public Health, Emory University.
Clinical associate professor Morehouse University School Medicine, Emory University. Member Statewide Child Fatality Review Panel, 1998. Member Board Health Promotion and Disease Prevention, Institute of Medicine, since 1998.
Member Technology Advisory Group on Devolution and Federalism, National Health Policy Forum, George Washington University, since 1998.
Member task force The National Campaign to Prevent Teen Pregnancy, 1996-1999. Member American Academy Family Physicians, American Public Health Association (governing council Georgia state chapter representative 1997-1999), American Sexually Transmitted Diseases Association, Association State and Territorial Health Officials (executive committee since 1998), Georgia Academy Family Physicians, Georgia Public Health Association, Medical Association Atlanta, Medical Association Georgia (public health and preventative health care committee since 1997).