Our Leadership Team

Executive Leadership

Margaret Crotty, President & CEO

Margaret Crotty, JSI president & CEO



    Margaret Crotty joined JSI and World Education as president and CEO on January 1, 2022. Most recently, she was CEO of the Partnership with Children, a New York City-based provider of community health services and school-based mental health programs. Previously, Margaret led Save the Children’s flagship initiative to reduce global child and maternal mortality. In the private sector, Margaret spent seven years in executive roles at the global corporation EF Education, living in Shanghai, Hong Kong, and Paris. She has also worked for McKinsey & Co. in Jakarta, Indonesia. Margaret graduated from Princeton University with a BA in history and African-American studies, and earned an MBA from Harvard Business School and an MPH from Columbia University.

    Margaret Crotty, JSI president

    Muka Chikuba-McLeod - Executive Vice President, International Division




      Muka Chikuba-McLeod brings over 30 years of experience in medicine, epidemiology, international health, and development. During her 22-year tenure at JSI, Muka has managed several of the organization’s largest multi-country and bilateral projects. She currently serves as Executive Vice President for the International Division. Muka holds an MD from the University of Zambia, an MPH in International Health from Boston University, and an MSc in Epidemiology from Harvard University.

      Janice Clark, MBA - Chief Finance and Operations Officer

      Janice Clark



        Janice Clark has more than 20 years of financial management experience in a global environment for both for-profit and nonprofit organizations. Before becoming the chief financial officer for JSI and World Education, Inc, Janice was the controller for World Education, Inc. and prior to that, the contracts and grants manager at JSI. Janice has a BA in philosophy and English from Boston College; an MA in philosophy from Boston College; and an MBA from the University of Massachusetts, Amherst.

        Mark Kowalski - Director, International Programs

        Mark Kowalski, Director, International Division, Boston



          Mark Kowalski has more than 25 years of experience managing public health and education programs in Africa and Asia. As director of the Boston International Group, he oversees JSI’s portfolio of bilateral health programs in more than 15 countries and the U.S.-based staff who support them. Mark started his career with JSI in 1999 and has served in senior leadership positions in the U.S., Zambia, and Uganda. Mark’s areas of expertise include capacity strengthening and HIV prevention and treatment and building partnerships with national governments, NGOs, and funders. Previously, Mark was country director for World Education, Inc. in Cambodia and a Peace Corps volunteer in Nepal. Mark has MAs of arts and public policy from the University of Michigan.

          Mira Levinson - Interim Co-Executive Director, U.S. Health Services Division




            Mira Levinson is the interim co-executive director of JSI’s U.S. Health Services Division and the director of JSI’s Health Services Boston office. Mira applies a system-wide and equity lens to her project work and her management and staff development roles. Mira’s focus areas include health care policy implementation, capacity building assistance, and quality improvement. During her 30 years in public health, she has led multi-year monitoring, evaluation, and data reporting activities for federal, state, city, and community-based programs. Mira has a national reputation in HIV and infectious diseases and has led many of our key projects in this area, most notably for the HRSA HIV/AIDS Bureau and the Massachusetts Department of Public Health. She holds a Bachelor of Arts from Hampshire College and a Master’s in Public Health from Columbia University.

            Mira Levinson

            Kate Onyejekwe - Chief Partnerships Officer

            Kate Onyejekwe, Director, International Division, Washington



              Kate Onyejekwe has worked in public health for more than 25 years. She has technical expertise in family planning and reproductive health, maternal and child health, immunization, HIV, gender and youth programming, community health, capacity building, and pharmaceutical management. Kate oversees the division’s portfolio of global programs, core competency centers, and corporate services teams. She also supports JSI’s new business development. When she joined JSI in 2015, Kate was the Maternal and Child Survival Program’s country support manager, interfacing with USAID bureaus and missions, ministries of health, international agencies, and other partners, and helping secure JSI’s technical footprint in 14 countries. Before JSI, Kate had a variety of roles at Management Sciences for Health and Pathfinder International.

              Antonia Powell, Executive Director, World Education




                As the executive director for World Education, a division of JSI, Antonia Powell is responsible for organizational development and strategy, staff management, visibility and sector engagement, financial management, fundraising and donor relations, and organizational management. Antonia joined JSI in 2019 as the co-director of the JSI/World Education Center for HIV and Infectious Diseases, where she provided technical leadership across JSI’s international programs and supported knowledge management and collaboration across the organization. Prior to joining JSI, she spent 17 years implementing large-scale public health and development programs in Asia, Africa, and Latin America. She has an MSc in Population and International Health from the Harvard School of Public Health.

                Jonathan Rucks, Chief of Staff

                Jonathan Rucks, Chief of Staff



                  Jonathan Rucks is a seasoned leader with two decades of experience in team leadership, policy and advocacy expertise, and technical support, all dedicated to enhancing global development and health policy and programming. Before joining JSI, he was Chief of Staff at FP2030, an initiative of the United Nations Foundation, where he acted as an administrative leader and strategic advisor to ensure that every action was aligned with the organization’s mission. Jonathan has also held several senior-level roles at the Eleanor Crook Foundation, PAI, and Pathfinder International. He has a BA in political science and english from St. John’s University and an MA in strategic security studies from the National Defense University.

                  Jonathan Rucks, Chief of Staff at JSI

                  Rachel Tobey - Interim Co-Executive Director, U.S. Health Services Division

                  Rachel Tobey



                    Rachel Tobey is the interim co-executive director of JSI’s U.S. Health Services Division and the director of JSI California’s office. Her expertise includes health policy research, development, and implementation, with a focus on how payment and financing can shape and support care in systems serving Medicaid populations. Rachel has 25 years of experience in health care and policy and more than 10 years’ experience working with community health centers to meet patient needs and improve health equity. Since 2017, she has been co-director of The Delta Center for a Thriving Safety Net, a national initiative that convenes state primary care and behavioral health associations to advance policy and practice change. Rachel has also served as a leader of the Delta Center California initiative and as a subject matter expert on California’s development of an alternative payment model for community health centers. She holds a Bachelor of Arts from Stanford University and a Master’s in Public and International Affairs from Princeton.

                    Rachel Tobey

                    U.S. Leadership

                    Alexia Eslan, Director, Colorado Office

                    Rene Esler, Director, Georgia Office

                    Mira Levinson, Director, Boston Office

                    Katie Robert, Director, New Hampshire Office

                    Katie Saul, Associate Director, Massachusetts/Rhode Island Office

                    Shannon Spurlock, Associate Director, Rhode Island Office

                    Rekha Sreedhara, Associate Director, New Hampshire Office

                    Rachel Tobey, Director, California Office

                    International Leadership

                    Nabeela Ali, Pakistan Country Representative

                    Wuleta Betemariam, Director, Center for Healthy Women, Children and Communities

                    Yasmin Chandani, InSupply CEO

                    Binyam Desta, Ethiopia Country Representative

                    Sanjay Kapur, India Managing Director

                    Derek Kunaka, South Africa Country Representative

                    Anne LaFond, Center for Health Information, Monitoring and Evaluation Director

                    Melinda McKay, Behavior Initiative Director

                    Jonathan Metzger, Center for Digital Health Director

                    Sandee Minovi, Deputy Director, Center for Healthy Women, Children and Communities

                    Lora Shimp, Immunization Center Director

                    Edward Wilson, Center for Health Logistics Director

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