Diana Harper

Diana is the Senior Evaluation and Learning Specialist for the Vaccine Program at Nexleaf. She leads project research and evaluations and works with key partners to translate learning into action. She brings more than 15 years of experience using data to drive social change and specializes in methods that prioritize local leadership and reflect the complexity of the real world.

Prior to joining Nexleaf, she led evaluations for a diverse set of international clients and programs. Her research has helped her partners to achieve better and more inclusive results in areas such as children’s mental health, youth leadership, and local governance systems. As an in-house evaluation expert at the U.S. Agency for International Development, she supported evaluations and studies across a $6B global health portfolio in more than 50 countries worldwide. Her work experience also includes partnering with local organizations to reduce youth violence in Mexico, designing leadership training courses for healthcare workers at more than 1,000 hospitals in the U.S., and advocating for improved access to childhood vaccines in Africa and Asia.

Diana holds a Master of Public Health from Johns Hopkins University and a B.A. in Political Economy from Georgetown University. She speaks Spanish and has lived and worked in 12 countries worldwide, with a focus on Latin America and East Africa.