Dr. Mary Mahy has over 22 years of experience using data to transform the HIV response. Mary brings her technical expertise and passion to use evidence to close the inequalities that allow the HIV pandemic to persist. As the UNAIDS Director for the Data for Impact Practice, she leads the collection and analysis of the world’s most comprehensive collection of data on HIV. Through the DFI Practice, including 80 staff around the globe, she promotes the goal of ensuring that countries use data to improve their HIV response and ultimately end AIDS as a public health by 2030. Mary is a demographer by training and received her doctorate in population dynamics from the Johns Hopkins School of Hygiene and Public Health.