Barbara de Zalduondo is an independent consultant specializing in the social determinants and dimensions of HIV and other complex biosocial challenges in global health. With 30 years of research, policy, and management experience in social sciences and public health in low- and middle-income countries. Dr. de Zalduondo has designed and led collaborative HIV programme planning and evaluation, policy analysis, capacity development and evidence based advocacy initiatives for combination HIV prevention at global and country levels. She has driven innovative, collaborative research on social protection and HIV, sex work and HIV, HIV-related stigma, measurement of HIV prevention outcomes, and on the interplay of culture, health and sexuality in HIV risk behaviour. Formerly a Division Chief, Associate Director, and Senior Advisor to the Deputy Executive Director of UNAIDS, Director of Global Strategies at Social & Scientific Systems, Inc., Senior Technical Advisor at USAID Division of HIV/AIDS, and on the faculty of Johns Hopkins Bloomberg School of Public Health, she holds a PhD in biological anthropology from Harvard University and a Master of Science in Behavioral Sciences from The Harvard School of Public Health.