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Chris has more than 20 years' experience with leading international law firms and major corporates across Asia Pacific, the United Kingdom and the United States.

Alan White is a nationally renowned health economist, highly respected for his rapid response to clients’ complex information and research needs with data-driven, creative solutions. As the senior health economist for the Health Policy Practice, he leads high-profile projects and guides the practice’s health economists.

Katharine Witgert is a health policy researcher with 20 years of public health and health care policy experience. Witgert manages research and analysis of health system innovations, conducting program evaluations for federal clients, including design, implementation, and reporting of findings. She provides technical assistance to state officials, primarily in the areas of Medicaid reforms and building Medicaid agency partnerships with public health, behavioral health, and social services programs.

Jennifer S. Riggs, Ph.D., brings her extensive research, policy, and nursing experience to improve care for patients, especially older adults. Her clinical area of expertise is Medicare-certified home health and home and community-based care for adults and older adults with multiple co-occurring chronic conditions and complex care coordination needs.

William Tuleu leads strategic growth initiatives across the company's U.S. foreign assistance and domestic portfolios.

Sean McClellan, Ph.D. is a mixed-methods researcher with over a decade of experience in full cycle health services research. He has experience managing research projects, developing analytic designs, cleaning and analyzing administrative data, fielding rigorous surveys, conducting qualitative interviews, and communicating findings in plain language.

Daniel Gubits conducts research in the areas of housing, homelessness, economic self-sufficiency and disability policy. Gubits’ expertise is in econometric modeling, data analysis, and random assignment program evaluation.Gubits serves as the director of analysis for the Family Options Study, conducted for the U.S. Department of Housing and Urban Development (HUD). He is also leading the impact analysis work for the Social Security Administration’s Benefit Offset National Demonstration (BOND) project. Both of these are random assignment impact evaluations.

Eric Reading leads major initiatives at the enterprise level for Abt Global, particularly in areas of strategic priority including digital transformation. He previously led Abt Global’s International Development Division, the largest division of the firm.