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Douglas W. Elmendorf, Ph.D., is Lucius N. Littauer Professor of Public Policy at Harvard University’s John F. Kennedy School of Government. He served as Dean of the Kennedy School from 2016 to 2024 and was previously Director of the Congressional Budget Office from 2009 to 2015.Elmendorf has held senior economic positions with the Federal Reserve Board, the President’s Council of Economic Advisers, and the Treasury Department, where he was Deputy Assistant Secretary for Economic Policy. He is a widely respected economist who has deep knowledge of many of Abt’s core research areas, including health care policy and approaches to increasing economic security.Elmendorf is the author of more than 30 publications and has testified before Congress on economic issues 50 times since 2005. 

Olga Zues, a health-system and financing specialist, has 20 years of experience in international development. She focuses on the design and implementation of comprehensive reform strategies to strengthen health systems and public finance management. Her expertise includes benefits design to move towards universal health coverage, arrangements to support efficiency gains and service delivery improvements, innovative payment mechanisms, sustainability strategies, and institutional development. She has worked with the World Health Organisation (WHO), the World Bank, the Global Fund to Fight AIDS, Tuberculosis and Malaria, the U.S. Agency for International Development, the UK Department for International Development – now the Foreign, Commonwealth and Development Office – and numerous ministries of health, finance, justice, and education.

Sarah J. Shoemaker-Hunt has more than 15 years of experience as a health services researcher and implementation scientist. As an experienced pharmacist, she brings a practice-informed lens to her role conducting mixed-methods studies and evaluations and delivering technical assistance and quality improvement projects for federal health agencies. They include the Agency for Healthcare Research and Quality (AHRQ), Centers for Disease Control and Prevention (CDC). Clients also include non-governmental organizations. Sarah is the Abt client account lead for AHRQ.

Meghan Henry is a social science researcher with over 15 years of experience in public policy and program evaluation, specifically in the fields of housing and homelessness and the intersection of homelessness and education. Henry has extensive experience leading evaluations, including large data collection efforts, conducting qualitative data collection, data analysis, and outcome evaluations. As project director of the U.S. Department of Housing and Urban Development’s (HUD) Annual Homeless Assessment Report (AHAR) to Congress, she has considerable experience synthesizing large amounts of information to make the data accessible and actionable for federal, state, local, and philanthropic clients.

Colleen Grogan Moore has over 30 years of experience implementing community development and housing-based programs in collaboration with state and local governments and nonprofit organizations. She has expertise in providing technical assistance (TA) and training, including to recipients of Department of Housing and Urban Development (HUD) community development, housing, and homeless program funding. She has experience building strong relationships with state and local program grantees and managers and supporting communities in effectively using resources.

Lisa Simeon is Abt Global’s Chief Operations Officer.  In this role, Simeon is establishing a global operations function to cover all aspects of project management. It will include continuous improvement and scalability of Abt’s standards, processes, and digital platforms for project start-up and closeout, workforce planning, risk management, and quality review to achieve strong financial performance and ensure client satisfaction across the company. She will continue to oversee Human Resources and will add responsibility for global security operations and emergency response to her portfolio.

Dr. Karen Gray-Adams is an educational psychologist with nearly 25 years of experience in research and technical assistance. She provides capacity building and technical assistance on K-16 education and other policy issues, strategic planning, and mixed-methods research. She is a team leader and researcher who engages partners and helps build capacity to create solutions at the local, regional, state, and national levels. She also works directly with community-based organizations, providing one-on-one coaching in holistic and participatory evaluation methods.

Eduardo Castellon has two decades of experience helping public sector clients—from the U.S. Agency for International Development (USAID) and the U.S. Postal Service (USPS) to the Department of Housing and Urban Development—grow and refine their operations and impact. He has extensive experience delivering consulting expertise focused on artificial intelligence (AI), supply chain, procurement, financial management, and advanced analytics. His technological, consultative, and entrepreneurial skills help clients find new ways to address challenges ranging from affordable housing to homelessness to guaranteed income. He also has extensive expertise in technical assistance and implementation (TA&I) approaches. And his management experience includes developing high-performing teams through skills and career development and succession planning.

Dr. Satyendra Prasad is the Principal Technical Lead for Abt’s climate initiatives in the Asia-Pacific region. Dr. Prasad is a diplomat and governance expert with over two decades of governance experience across international organizations, including the United Nations (UN), World Bank, and the UK’s Department for International Development (DFID) – now known as the Foreign, Commonwealth & Development Office.

Leah Dyson brings over two decades of experience within human services and the pursuit of health and well-being as a strategic planner, organizational and business developer, partnership builder, and facilitator. She has expertise in behavioral health and direct community programming. Dyson has worked on technical assistance, implementation, capacity-building, organizational transformation, and qualitative evaluation efforts with a number federal agencies and partners, including the Substance Abuse and Mental Health Services Administration (SAMHSA), Health Resources and Services Administration (HRSA), and Veterans Health Administration (VHA). She also has worked within academic, nonprofit, and local government spaces, implementing informed and practical responses to organizational and community needs and bridging stakeholder perspectives.