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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.

Brian Chirwa is an agricultural and environmental scientist with over three decades worth of experience working on projects funded by the World Bank, the U.S. President’s Malaria Initiative (PMI), the Environmental Council of Zambia, and the Southern African Development Community (SADC). He brings 18 years’ experience on PMI-funded projects focused on indoor residual spraying (IRS) and insecticide-treated nets (ITNs) and has provided technical leadership, assistance, and high-level management for country-wide Zambian IRS and ITN campaigns. Brian also has three decades' worth of experience designing environmental information systems (EIS) for public organizations.

Jules Nahimana is a health program manager with almost two decades of experience working in the public health sector. He has worked extensively on malaria vector control programs, especially those implementing indoor residual spraying (IRS), in countries including Burkina Faso, Malawi, Mozambique, and Rwanda. In these roles, he has worked with many high-level organizations including the Ministries of Health (MOH) and the U.S. President’s Malaria Initiative (PMI).

Shriya Kalavapudi brings 11 years of experience in dissemination and communication planning and strategy. She has experience with social media management, web and social media analytics, and content development. She also has expertise in communications products and creative materials development, including newsletters, reports, briefs, journal articles, blogs, videos, and infographics. In addition, she has experience with outreach and dissemination, primarily in the federal healthcare space. Kalavapudi translates complex information (health information, data, and research) for audiences of various technical knowledge, including policymakers and practitioners.

Dr. Rebecca McGill-Wilkinson is an education researcher with two decades of experience designing and implementing evaluation and research projects. She has extensive expertise in a broad range of impact and implementation evaluation approaches, including quasi-experimental designs, randomized control trials, survey design and analysis methods, systematic evidence reviews, and measure development. Her work includes evaluations of federal education policies, including the Every Student Succeeds Act (ESSA) and the Bipartisan Safer Communities Act (BSCA). With a background in developmental psychology, she has contributed to systematic evidence reviews for both the Administration of Children and Families and the U.S. Department of Education. McGill-Wilkinson is the author of numerous peer-reviewed articles and book chapters on a range of topics and has delivered over 40 conference presentations and invited talks in academic and practice settings and is a prolific blog author.

Benny Kil is a certified Project Management Professional (PMP) and a certified scrum master (CSM) with over 15 years of project and product management experience—working in business analysis and project delivery in the federal, state, and commercial areas with a focus on technology and digital processes. He has experience in leading multidisciplinary teams to deliver client requirements using agile methodologies (scrum and kanban). 

Jessen Carroll is a human resources (HR) professional with more than 20 years of experience overseeing all aspects of HR, organizational communications, governance, and administration functions. She has experience leading organizational integrations and change management efforts. She also has operations management, business analysis, business process improvement, and project management experience. She can balance tactical day-to-day operational needs with a strategic grasp of long-term business objectives. 

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.

In his career as a senior finance and operations executive, Rehberger most recently served as the Senior Vice President, Chief Financial Officer of Engility, a Virginia-based government contractor.  He held similar positions with TASC from 2010 until its merger with Engility in 2015.  Rehberger helped guide both companies as the government industry cycled through a severe downturn and recovery, counseling the Board of Directors regarding strategy, enterprise risk management, cyber security, and compensation.  He previously held executive positions with telecommunications firms XO Communications and MCI. In 2017, Virginia Business awarded Rehberger the Virginia CFO of the Year award for his outstanding commitment to financial stewardship and dedication to the success of Engility.