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Natalie Matthews has over 15 years of experience in the field of homelessness, with a focus on direct service, system planning, database administration, and technical assistance and implementation (TA). Since joining Abt in 2009, Matthews has served in a variety of roles on its U.S. Department of Housing and Urban Development (HUD) Community Compass TA cooperative agreements. She’s also worked on several locally and U.S. Department of Veterans Affairs (VA)-funded TA projects, as well as research, monitoring and evaluation projects.  She served as the project director for the VA’s Supportive Services for Veteran Families (SSVF) monitoring project, served on the evaluation team for HUD’s first evaluation of rapid re-housing programs for families (2012), and led the evaluation of Hartford Connecticut’s homelessness prevention and rapid re-housing program (2014).

Etienne Fondjo is a medical entomologist specializing in malaria with 20 years of experience in project management and malaria control funded by the public sector and its partners. He has served as the national malaria coordinator and as the deputy national malaria coordinator in Cameroon’s National Malaria Control Program (NMCP). He has also consulted for the World Health Organization (WHO) in five countries, served as principal investigator for 11 projects in Cameroon, and was the Central Africa coordinator for the Mapping Malaria Risk in Africa (MARA) project in nine countries.

Robin Koralek is a seasoned evaluator and project director with over 30 years of experience in evaluating federal and state social welfare programs. Her expertise spans areas such as food assistance, employment and training cash assistance, and barriers to employment, including for those recovering from substance use disorders. She has worked with various governmental and non-profit organizations, focusing on program design, implementation, and outcomes.

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.

Bradford Lucas is an expert in international health and social marketing with more than 20 years of experience leading complex global health projects and managing large teams. His program experience includes malaria and child health, reproductive health, and HIV/AIDS, and he has worked in numerous countries in Africa, Asia, and Latin America. Throughout his career, Lucas has been recognized for his thought leadership and initiative in piloting, scaling up, and replicating new products, services, and approaches; improving processes; and disseminating best practices.

Sanjoti Parekh has 20 years of experience serving in leadership, management, and advisory roles in the Australian healthcare industry. Prior to that she worked as a clinician for five years. With expertise in public health, epidemiology, and primary care, she leads policy and program reviews, rapid and systematic literature reviews, health services planning, and development of population health strategies. In addition, Sanjoti oversees outcome and impact evaluations, post-implementation reviews, and quality-improvement, governance, and research programs.

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.

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.

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.