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Natalie Matthews has over 15 years of experience in the field of homelessness, with a focus on direct service, system planning, database administration, and technical assistance and implementation (TA). Since joining Abt in 2009, Matthews has served in a variety of roles on its U.S. Department of Housing and Urban Development (HUD) Community Compass TA cooperative agreements. She’s also worked on several locally and U.S. Department of Veterans Affairs (VA)-funded TA projects, as well as research, monitoring and evaluation projects.  She served as the project director for the VA’s Supportive Services for Veteran Families (SSVF) monitoring project, served on the evaluation team for HUD’s first evaluation of rapid re-housing programs for families (2012), and led the evaluation of Hartford Connecticut’s homelessness prevention and rapid re-housing program (2014).

Mariandrea Chamorro has 20 years of experience managing international development programs. She has provided oversight for the high-quality and compliant execution of large flagship USAID programs while contributing to business development. Chamorro’s areas of expertise include prevention of vector-borne diseases, infectious diseases, maternal and child health, and health systems strengthening. Her clients have included the U.S. Agency for International Development (USAID), the Australian Department of Foreign Affairs and Trade (DFAT), and the UK’s Foreign Commonwealth & Development Office (FCDO). 

Andrew Alderdice is an experienced health and human services leader with more than 35 years’ experience across Australia, New Zealand and the Pacific. He is currently Abt Global’s Country Manager for Papua New Guinea (PNG).

Leonard M. Hicks, whose 20+ years of experience in business operations and financial management includes leading large-scale growth and transformation for Lockheed Martin and the Mission Essential Group, is Abt Global’s chief financial officer and a member of the executive management team. He is a proven entrepreneur who brings best-in-class leadership and collaborative approaches to problem solving.

Baris Yener has more than 25 years of experience in executive leadership, growth strategy development, and organizational transformation. His business-development and project work has involved a wide range of clients, including the World Bank, Department of Defense, Department of Homeland Security, Centers for Disease Control and Prevention, and other private sector and federal agencies.As Chief Client Officer at Abt, Yener leads client strategy and growth to ensure the voice of the customer drives investment decisions, capability development, and market execution. 

Francesca Lawe-Davies is a senior development specialist with more than 18 years of experience in government, non-government, private sector, and multilateral development organisations. She has broad experience leading teams in complex development programs across Southeast Asia and the Pacific. Francesca has worked with government and civil society leaders at all levels, providing strategic and technical advice and guiding programmatic support on education policy and delivery, decentralisation, village governance, peacebuilding, and gender-based violence prevention and response services.

Bradford Lucas is an expert in international health and social marketing with more than 20 years of experience leading complex global health projects and managing large teams. His program experience includes malaria and child health, reproductive health, and HIV/AIDS, and he has worked in numerous countries in Africa, Asia, and Latin America. Throughout his career, Lucas has been recognized for his thought leadership and initiative in piloting, scaling up, and replicating new products, services, and approaches; improving processes; and disseminating best practices.

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. 

Leslie Vasquez is a health policy and value-based payment expert with 20 years of experience working across federal, state, and commercial health care markets.