Practice:

• President, Quattro Clinical Research, LLC, Oakland, California, April 2004 - present.
• Clinical research consultant, Darien, Georgia, February 2004 - April 2004.
• Vice President, International Clinical Research, VaxGen, Inc., Brisbane, California, January 2000 - January 2004.
• Chief, HIV Vaccine Unit, Epidemiology Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention (NCHSTP), Centers for Disease Control and Prevention, Atlanta, Georgia, August 1998 - January 1, 2000.
• HIV Vaccine Coordinator, Office of the Director, Division of HIV/AIDS Prevention, NCHSTP, Centers for Disease Control and Prevention, Atlanta, Georgia, April 1997 - July 1998.
• Vaccine Coordinator, Joint Appointment with National Center for HIV, STD and TB Prevention and the National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, September 1996 - April 1997.
• Epidemiologist/Vaccine Specialist, Department of Policy, Strategy, and Research, Joint United Nations Programme on HIV/AIDS (UNAIDS), Geneva, Switzerland, January 1996 - August 1996 (on official secondment from CDC).
• Scientist, Vaccine Development Unit, Office of Research and Intervention Development, Global Programme on AIDS, World Health Organization, Geneva, Switzerland, April 1993 - December 1995 (on official secondment from CDC).
• Medical Epidemiologist, International Activity, Division of HIV/AIDS, Center for Infectious Diseases, Centers for Disease Control, May 1992 - April 1993.
• Director, Projet SIDA, Division of HIV/AIDS, Center for Infectious Diseases, Centers for Disease Control, Kinshasa, Zaire, August 1990 - April 1992
• Chief, International Activity, AIDS Program, Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia, June 1987 - July 1990.
• Centers for Disease Control Career Development Program, Johns Hopkins University School of Hygiene and Public Health, Baltimore, Maryland, June 1986 - May 1987.
• Affiliate Assistant Professor, University of Alaska, Anchorage, Alaska, January 1985 - May 1986.
• Director, Arctic Investigations Laboratory, Center for Infectious Diseases, Centers for Disease Control, Anchorage, Alaska, May 1984 - May 1987.
• Assistant Clinical Professor of Public Health, University of Hawaii School of Public Health, Honolulu, Hawaii, January 1983 - May 1986.
• Acting Director, Arctic Investigations Laboratory, Center for Infectious Diseases, Centers for Disease Control, Anchorage, Alaska, October 1981 - May 1984.
• Deputy Director, Arctic Investigations Laboratory, Center for Infectious Diseases, Centers for Disease Control, Anchorage, Alaska, July 1981 - May 1984.
• Adjunct Staff Physician, Medicine Department, Alaska Native Medical Center, Anchorage, Alaska, July 1979 May 1986.
• Epidemic Intelligence Service Officer, Alaska Investigations Division, Bureau of Epidemiology, Centers for Disease Control, Anchorage, Alaska, July 1979 - June 1981.