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Our Team

Real People, Real Solutions


Josh Greenberg Chief Executive Officer

Josh founded PHP with Eddie Zhang in November 2007. He is currently in his first year of the dual M.D. and Ph.D. program at the University of Michigan, pursuing his Ph.D. in Economics. His guiding objective is to combine medicine and the social sciences to promote human rights and to develop and implement sounder models for effective and responsible humanitarian assistance. Building on his experience in bioethics, which gained him speaking appearances across the country, Josh became increasingly dedicated to fighting for global health equity after he entered college at Duke University. There, he undertook an interdisciplinary course of study in global health, focusing on development economics, and ultimately being awarded magna cum laude, graduation with distinction, and Phi Beta Kappa. Within PHP, Josh’s role is to integrate all of the moving parts of the organization, continually develop the organization’s vision, and spearhead new initiatives. In 2011, Josh received a Fulbright Scholarship to further support his work in Uganda. Despite the great challenges of working in global health, Josh always looks forward to collaborating with the resourceful community members PHP serves.

Eddie Zhang Chief Operating Officer

Eddie is currently a third-year medical student at the Icahn School of Medicine at Mount Sinai, where he is part of the selective Humanities and Medicine Program. He graduated magna cum laude from Duke University with a Bachelor of Arts in English. In the summer after his freshman year, he worked for the Institute for Financial Management and Research/Centre for Micro Finance in Odisha, India, researching the effects of rapid diagnostic testing on treatment-seeking behaviors for malaria. Upon returning to Duke, he began to develop the details of PHP’s operations. At Duke, he also participated in the prestigious Service Opportunities for Leadership program and was a Johnson Distinguished Undergraduate Research Assistant in the Department of Economics. Eddie is highly interested in the design and implementation of low-cost technologies for the developing world. His degree in literature gives him an especially humanistic perspective in his medical pursuits. As Chief Operating Officer, Eddie is responsible for managing the day-to-day activities of PHP, overseeing project objectives, and designing the technical framework for the organization.

Helen Zhang Chief Financial Officer

Helen is currently a second-year medical student at Duke University, where she also graduated summa cum laude and Phi Beta Kappa with a bachelor’s of science degree in Biology in 2011. During her undergraduate studies, Helen became particularly interested in the intersection between ill health and poverty, alongside community-based approaches to healthcare delivery. She spent time in 2011 assessing the community structures in place to manage the rainwater harvesting tanks constructed by PHP in Kashongi and Kitura. As a developing physician, she hopes to integrate her interest in addressing disease at both the individual and community levels. As CFO, Helen oversees budgeting and record-keeping for PHP’s activities.

Alex Sun Chief Service Officer

Currently a first-year medical student at the Yale School of Medicine, Alex first became interested in global health during his undergraduate years at Duke.  He helped launch PHP’s programs in Uganda in 2009 and returned there in 2011.  Alex graduated from Duke University with a degree in Biomedical Engineering.  In 2012, he was honored with a fellowship award from the Whitaker International Program to conduct biomedical engineering research at the Eindhoven University of Technology in the Netherlands.  Alex is interested in the contributions that innovative biomedical engineering technologies can make in global health in low-resource countries, and is currently also pursuing a Certificate in Global Medicine at Yale.  As Chief Service Officer, Alex is in charge of managing and designing our service delivery activities in our partner communities in Uganda.

Katherine Donato Chief Research Officer

As a Ph.D. student in health policy and economics at Harvard University, Katherine has extensively studied health and development economics with a focus on health systems in low-income settings.  She has a keen interest in how such healthcare systems cater to maternal and child health.  Before coming to Harvard in 2012, Katherine worked for the Duke Global Health Institute and Sanford School of Public Policy, studying a pay-for-performance program in rural India focused on maternal and child health.  As Chief Research Officer, Katherine is responsible for leading PHP’s rigorous evaluations of past and current projects that will help focus the future initiatives of the organization.  She also focuses on designing new programs that are well-grounded in scientific evidence.  Katherine graduated from Duke University with a master’s degree in Economics and from Georgetown University magna cum laude with a bachelor’s degree in International Economics.


Jordan Bateisibwa Director of Programs

Jordan Bateisibwa is a co-founder of PHP Uganda. He started working with PHP in a summer of 2009 and helped coordinate the team’s activities. Jordan graduated from Uganda Christian University – Mukono, and specializes in community development. From his own background growing up in rural Uganda, he is passionate about helping others who are suffering from poverty and disease, and strives to improve the livelihoods of poor communities. After graduation, he completed a post-graduate diploma in project planning and management from the Uganda Management Institute to gain more exposure to planning and management. Currently, he is undertaking a Masters program in Development Studies at Bishop Stuart University. A happier and better community is his dream.

Sanjana Marpadga Director of Social Media

Sanjana graduated from Duke University in 2013 with a B.S. in Biology. She is currently working for the Hart Leadership Program (HLP) at Duke University’s Sanford School of Public Policy. During her undergraduate studies, Sanjana had the opportunity to conduct a summer community-based research project on diabetes knowledge in Tanzania through HLP’s Service Opportunities in Leadership program. The experience sparked her interest in health care justice and diabetes awareness on Duke’s campus. She returned in the fall determined to organize the university’s first recognition of World Diabetes Day. Sanjana continued to integrate global health into her academic pathway and extracurricular activities, leading the university’s Global Health Week and serving as the Global Health Graduation Speaker her senior year. Moving forward, she hopes to pursue her interests in community-based research. As Social Media Director, Sanjana maintains PHP’s social media presence.