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Kate Stillman is a technical leader with more than 25 years of experience in program design, systems thinking, evidence generation and use, monitoring, evaluation and learning, and project management. She has deep experience in global development with specialties in health systems strengthening, infectious and vector-borne diseases, maternal and child health, and sustainability. She drives Abt’s efforts to strengthen the generation, management, and use of high-quality data to inform decisions and improve program quality.

Jill Khadduri came to Abt Global in 2000 from the U.S. Department of Housing and Urban Development, where she was a career senior executive deeply involved in housing research and policies.She conducts research on homelessness and homeless-assistance programs and on housing programs and strategies, among them the Low Income Housing Tax Credit, Housing Choice Vouchers and public housing. She serves as a senior advisor to major research projects conducted by Abt’s housing practice, including studies that use experimental designs to measure the impacts of homebuyer counseling and of giving homeless families priority access to different types of housing and shelter programs. One of Abt’s senior fellows, she completed a history of HUD from its founding in 1965 through its 50th anniversary in 2015. She co-authored the book, In the Midst of Plenty: Homelessness and What To Do About It, with Marybeth Shinn.

Ellen Bobronnikov has extensive research and evaluation experience in educational and social policy in both domestic and international contexts. Her focus includes project management, evaluations of federal and local programs, and the provision of technical assistance. She has experience conducting impact, implementation, and process studies.

Elizabeth Giardino’s evaluation and technical assistance work on housing, community development, asset building, and government innovation policies and programs promotes more equitable access to opportunity and healthy outcomes for people across the U.S. Giardino specializes in leading teams, strategic planning, and relationship building, and has proven expertise in community-based participatory research and incorporating equitable approaches into technical assistance engagements.

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Susan Longley has 20 years of experience leading large-scale policy implementation and change management efforts for numerous federal clients such as the Centers for Medicare & Medicaid Services (CMS). Named a top healthcare exec to watch in 2023, she has collaborated with key stakeholders to maintain mission-critical initiatives in areas such as health care quality, public reporting, performance measurement, and domestic preparedness. She has implemented growth and diversification strategies across multiple sectors, including health and homeland security.