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Dr. Jessica Thornton Walker is an accomplished researcher and the leader of Abt’s quantitative methods team who brings 20 years of experience designing and implementing policy-relevant research. She is a recognized expert in large-scale, multi-site evaluations to assess the impacts of social policies and programs in housing and homelessness, child welfare, adolescent risk-taking behaviors, and substance use.In her role as the Quantitative Methods Lead, Dr. Walker is responsible for the management, staffing, budgeting, solutioning, and strategy that guides the work of 120 quantitative research staff and ensures Abt provides high-quality technical delivery and innovative solutions tailored to clients.

Hanna Kovalova is a program manager with 15 years of experience managing humanitarian aid and development programs in Ukraine, with a recent focus on the eastern part of the country ravaged by the war with Russia. She has worked with international organizations, including the Foreign, Commonwealth & Development Office (FCDO) and the United Nations, as well as social enterprises. Kovalova’s work with vulnerable populations has centered around gender equality, non-discrimination, conflict sensitivity, and social inclusion. She has extensive experience with monitoring, evaluation, research, and learning approaches; program management; and communication strategies in public health, mental health, and community stabilisation.

Abt’s Ashfaq Enayetullah explains how commercial engagement furthers sanitation goals of our Feed the Future activity in Bangladesh and improves nutrition.

Diane Paulsell is an applied social scientist with more than 20 years of experience designing, conducting, and overseeing mixed-methods policy-focused research, including national multi-site studies. She has also led rapid cycle learning and program improvement efforts with a variety of human services programs and a foundation-funded research program on family supportive services. Her areas of expertise range from early care and education to parenting, family engagement, youth development and family supportive policies and programs, including nutrition.

Sarah Gibson is a project-management specialist with 23 years of experience in public policy research. She has more than 20 years of experience managing complex projects, implementing random assignment studies and researching and analyzing policy for clients such as the Social Security Administration and the Department of Housing and Urban Development. She is proficient in project management, including resource management, budgeting and quality control.

Andrew Clarkwest has more than 18 years of experience in workforce policy and evaluation design. He has held lead management and technical roles in many quantitative and mixed-methods studies, including multi-site random assignment evaluations, quasi-experimental impact evaluations, and descriptive studies. He develops evidence to meet the practical needs of program and policy audiences and makes complex research accessible. He has translated research insights through systematic evidence reviews, technical assistance, and easy-to-consume dissemination products.

David Kaz, a principal associate in Abt’s Social and Economic Policy Division, has nearly 20 years of experience providing technical assistance, training, research, and policy analysis. He has worked on a wide range of programs and policies that affect low-income populations. He has directed, designed, and conducted both large- and small-scale, multi-faceted technical assistance projects for federal and state agencies and other clients and stakeholders. Clients have included the U.S. Department of Agriculture (USDA) Food and Nutrition Service, Washington State’s Department of Social and Health Services, King County, and the City of Seattle. He has worked on workforce legislation with members of Congress.

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.