Leadership Team

Scott Radloff, PhD - Director, Technical Unit

Dr. Scott Radloff provides overall strategic direction to PMA as well as overseeing technical aspects of the project, including survey operations, data management and analysis. He works closely with PMA staff, faculty, and students to support our network of implementing partners and coordinates with funders and external partners to ensure progress against project goals and objectives. Dr. Radloff received his doctorate in Sociology with a focus on demography from Brown University.  Prior to his work with PMA, Dr. Radloff worked with the United States Agency for International Development for 30 years. During this time, he served as the Director for the Office of Population and Reproductive Health for seven years. 

Elizabeth Gummerson, PhD, MPA - Deputy Director, Technical Unit

Dr. Elizabeth Gummerson provides technical and operational leadership for the PMA project. Prior to joining PMA, she worked on implementing household surveys in Africa for over a decade in partnership with US and African Universities. She received  her PhD in Demography and a Master’s in Public Affairs, both from Princeton University. Her research work focuses on economic inequality and the socioeconomic factors that determine access to healthcare.

Heather Harrison, MPH - Director, Project Management Unit

Ms. Heather Harrison provides strategic direction for the project management arm of PMA including cost analysis, capacity development and business development. Prior to her work with PMA, Ms. Harrison worked with Jhpiego, Bill & Melinda Gates Foundation and Catholic Relief Services and has lived and worked in Latin America and Africa. 

Blake Zachary, MHS - Associate Director, Survey Operations

Mr. Blake Zachary provides technical oversight and leadership for the PMA project. He leads the survey planning, standardizes operations, and provides technical support in all program countries. Mr. Zachary has a Master of Health Science from the Department of International Health at the Johns Hopkins Bloomberg School of Public Health. Before joining PMA, Mr. Zachary was a survey manager for the Demographic and Health Surveys (DHS) Program and worked in several countries including in India on the National Family Health Survey.

Linnea Zimmerman, PhD, MPH - Primary Investigator, PMA Ethiopia and Associate Director, Research 

Dr. Linnea Zimmerman provides direction for PMA Ethiopia, overseeing both the survey implementation and intensive technical capacity building efforts. She also co-leads the research agenda and facilitates research and PMA2020 data utilization. She is an Assistant Professor in the Department of Population, Family and Reproductive Health at the Johns Hopkins Bloomberg School of Public Health. Dr. Zimmerman's research interests include contraceptive dynamics, measurement of pregnancy intention, and the intersection of reproductive health and humanitarian emergencies.

Aisha Siewe, PhD, MS MPH – Data Team Lead

Dr. Aisha Siewe provides oversight to the array of data collection, management and analysis activities for PMA and related projects. She oversees PMA technical capacity building efforts and assists in the planning, execution, and refinement of surveys. She received her Ph.D. in Epidemiology from Paris XI University. Some areas of her research expertise include mother-child nutrition, health disparities, and data modeling. Prior to joining PMA, Dr. Siewe was Senior Biostatistician within the Department of Epidemiology of the Johns Hopkins Bloomberg School of Public Health, where she provided data analysis consulting on various research topics, was responsible for development and management of database applications, and lead nutrition and census data management and analysis.

Philip Anglewicz, PhD - Director, Program of Research

Dr. Philip Anglewicz leads the development and realization of the PMA Program of Research, which involves the generation and prioritization of research questions in close collaboration with in-country partners; offering guidance on the questionnaire and indicator development; and providing technical capacity development to partners in survey design, research, and analysis. Dr. Anglewicz is also an Associate Professor in the Department of Population, Family and Reproductive Health at Johns Hopkins Bloomberg School of Public Health; his research interests include family planning, migration, and survey methods in developing countries.