1. Department of Family and Community Medicine, University of Arizona College of Medicine, Phoenix, AZ
2. STD Field Services, Maricopa County Department of Public Health, Phoenix, AZ
3. Maricopa County Department of Public Health, Phoenix, AZ (1997–2004)
4. Bio-Defense Preparedness and Response, Maricopa County Department of Public Health, Phoenix, AZ (2003–2005)