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Joan Chahenza is a renewable energy finance and policy expert with more than a decade of private and public sector experience in on-grid and off-grid renewable energy. Her main areas of expertise are financial modeling and structuring of power generation projects, government and regulatory stakeholder management, technical advisory services for renewable energy enterprises, and contract negotiation for power purchase agreements and geothermal drilling contracts.

Leulseged Ageze is an economist with nearly 20 years of experience directing health sector reform and health care financing technical assistance activities in Ethiopia. His technical expertise includes health insurance, fiscal decentralization, strategic planning, and policy development.Leulseged has provided technical assistance and leadership for four USAID health financing and health systems strengthening projects. One of his most significant contributions has been supporting the introduction and expansion of community-based health insurance and other health care financing reforms in Ethiopia. These reforms have mobilized resources to the health sector, strengthened health facility governance, and improved the quality, accessibility, and utilization of health services.

Dr. Emmanuel Malangalila is a public health specialist with over 40 years as a leader and manager of large-scale multi-sector development projects in Tanzania. He has served as Chief of Party for three USAID projects, working with senior U.S. and Tanzanian government officials in ministries of health, education, finance, and local government; technical specialists; and stakeholders. In his 20 years at the World Bank, Dr. Malangalila provided technical expertise in health policy, private sector engagement, government institutional structure, and multisector regulatory frameworks.

Since 2011, Dr. Anna Jefferson has spent her career in policy research creatively and rigorously applying ethnographic, participatory, and community-based methods to make policy research more person-centered. She is a subject matter expert in guaranteed income, inequality, consumer finance, and U.S. housing policy, and a fluent Spanish speaker. She co-leads Abt’s portfolio of guaranteed income evaluations and has worked extensively with the Consumer Financial Protection Bureau, Department of Housing and Urban Development, New York City Mayor’s Office of Economic Opportunity, and a range of philanthropic clients. Dr. Jefferson is an experienced principal investigator, project director and task leader, and co-leads Abt's qualitative and mixed methods affinity group. 

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.

An Abt-led report reviews five programs that combine SUD treatment and recovery services with employment services and makes recommendations for practitioners.

Parental intent to vaccinate children younger than five has declined over time as parents were less likely to think the vaccine was effective and safe.

Abt combines expertise in global health and climate change to devise strategies that will improve the resilience of systems and people worldwide.