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T.J. Pepping is an environmental scientist with 13 years of experience working in the intersection of data analysis and communication, helping clients interpret environmental data and share important information with the public. 

Kelly Wagner has over 25 years of experience designing and delivering technical assistance, training, and capacity building. A skilled public health professional trained in epidemiology, she has developed and led more than 10 national TA programs for federal awardees from various agencies including the Substance Abuse and Mental Health Services Administration (SAMHSA), the Health Resources and Services Administration (HRSA), and offices within the Department of Health and Human Services Office of the Assistant Secretary for Health (OASH). Wagner has worked with community-based organizations, health centers, academic institutions, and state/local health agencies, reaching target audiences with unique and diverse public health needs across the lifespan. 

Dr. Ndombour Gning Cisse is a biologist and scientist with 16 years of experience in public health and environmental health management, particularly in malaria vector control in Africa. She has experience in all aspects of insecticide spraying operations, including planning, training, supervision, human resources talent management, leadership development, strategic planning, project implementation, and capacity development assignments in four countries.

Adam Schaefer has over 16 years’ experience developing and managing environmental epidemiology research and evaluation projects. He is an expert in the health impacts of environmental exposures and has worked on both national and international projects, focusing on infectious disease, toxicology, health surveillance, and One Health. Before coming to Abt, Schaefer was a researcher at Florida Atlantic University. He has published numerous epidemiological studies in peer-reviewed journals.

Dr. Caroline Logan is a senior associate and health services researcher with over 15 years of experience in policy-focused mixed methods evaluation design, rigorous data collection and analysis, and development of integrated mixed methods reports and deliverables. Her expertise in federal and state health policy includes Medicare and Medicaid financing and delivery systems, care transformation and system integration, maternal health, the health and well-being of children, and the intersection of health and housing.

Alan White is a nationally renowned health economist, highly respected for his rapid response to clients’ complex information and research needs with data-driven, creative solutions. As the senior health economist for the Health Policy Practice, he leads high-profile projects and guides the practice’s health economists.

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.

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.