Jonathan Wittenberg serves as Co-President and CEO of the Guttmacher Institute. Mr. Wittenberg has more than 20 years of experience working in the field of sexual and reproductive health and rights (SRHR). Together with Co-President and CEO Destiny Lopez, he is responsible for the vision and strategy of the organization, mobilizing resources to support Guttmacher’s programs, and serving as a champion for the Institute in external forums. In 2022, he helped guide the Institute’s strategic response to the Supreme Court’s Dobbs decision, and he has since coauthored op-eds about the role of philanthropy in responding to the crisis brought on by that ruling. 

Previously, Mr. Wittenberg served in a wide range of roles at the Guttmacher Institute. From 2007 to 2019, he led the Institute’s fundraising efforts—first as Director of Development (2007–2013) and then as Vice President for Development (2013–2019). In these roles, he oversaw a period of major growth in the organization’s funding from private foundations, government agencies and individual donors. From 2018 to 2019, he served as interim CEO, and from 2019 to 2023 as Executive Vice President. 

Prior to joining Guttmacher, Mr. Wittenberg was the Program Associate for International Health Policy at the Commonwealth Fund, where he conducted policy analysis and managed relationships with Fund grantees. His experience in the field of SRHR dates back to 2003, when he worked as a public policy intern for Physicians for Reproductive Health (then known as Physicians for Reproductive Choice and Health). Mr. Wittenberg received a BS in health sciences from James Madison University and an MPH from the Yale School of Public Health. His volunteer experience includes a six-year term on the board of directors of the Abortion Liberation Fund of Pennsylvania. He resides in Philadelphia with his family.