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Matthew Trombley has a Ph.D. in economics with concentrations in health and applied econometric methods. He has extensive experience designing and conducting evaluations for the Center for Medicare & Medicaid Innovation (CMMI), including analyses of historically underserved populations.

Marianne El-Khoury is a seasoned health professional with a proven track record of leading and managing large-scale health programs. At Abt, she has held senior management and technical roles on USG-funded projects in health systems strengthening, infectious diseases, and private sector health. She has also led research and evaluation studies in family planning and reproductive health, maternal and child health, and health financing.

Catherine Hersey, a senior associate, is a seasoned health services researcher and project manager with over 15 years of experience in both Medicare and Medicaid. Her research areas include the implementation and evaluation of accountable care organizations and other alternative payment models, maternal health, substance use disorder, meaningful use of electronic health records, and hospital-acquired infections. Hersey also has experience in quality measurement and improvement. In addition, she has experience in both quantitative and qualitative analyses and managing large and complex projects.

Dr. Sandra Jo Wilson is a social science researcher with more than 25 years of experience designing and conducting rigorous research, systematic reviews, and meta-analyses across education, workforce development, and human services. 

Jane Pepperall is a senior health professional with over 30 years of experience in global health policy development and in supporting national health sector development in the Pacific, Asia, and Africa. She has focused on strategy and investments to strengthen health systems and health financing. Jane worked for the United Kingdom Department for International Development (DFID) (now the Foreign, Commonwealth and Development Office) for 20 years, including health adviser postings in Uganda, Kenya, Zimbabwe, Lesotho, Pakistan, and the Pacific. More recently she has been providing health strategy, policy, and technical advice to the Australian Department of Foreign Affairs and Trade (DFAT).

Jessica is a qualified international and community development practitioner with over 25 years of experience working in development in Southeast Asia, the Pacific and Australia. She holds a Bachelor of Asian Studies, Master of International and Community Development and a Graduate Certificate in Gender Policy and Mainstreaming. Jessica’s experience includes working with government, donors, multilaterals, the private sector, managing contractors and NGOs. 

Meaghan E. Glenn is a social science research associate with more than 10 years of experience designing and conducting public health and nutrition research and evaluation studies.

Brooke Abrams is a trained political scientist and researcher. With over 11 years of experience, she specializes in applied housing and health, bringing expertise in managing and contributing to place-based, mixed-method, and community-centered solutions. Her work spans research, evaluation, and technical assistance (TA) projects across diverse policy domains, delivering innovative and tailored strategies to drive impactful change.As a Client Solutions Architect at Abt, Abrams plays a pivotal role in designing client-focused frameworks and solutions that emphasize rigorous, data-informed, multi-disciplinary, and population-tailored design. She specializes in community-specific, monitoring, evaluation, and technical assistance approaches to engage and work alongside persons with lived expertise.

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.