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Didar Ali Didar is technical advisor for monitoring, evaluation, research, and learning (MERL) in Abt’s International Technical Practice (ITP). He has more than 10 years of experience in MERL, project design, and management in the areas of agriculture, food security, economic inclusion, civil society, governance, health, and education. He also has experience in women’s rights advocacy, including designing and implementing advocacy plans and organizing national and international events.

Matthew Trombley has a Ph.D. in economics with concentrations in health and applied econometric methods. He has extensive experience designing and conducting evaluations for the Center for Medicare & Medicaid Innovation (CMMI), including analyses of historically underserved populations.

Tamara Daley has 20 years of behavioral health, disability, and social-policy project leadership and evaluation experience. She brings expertise from work with a variety of federal agencies, including Substance Abuse and Mental Health Services Administration (SAMHSA), National Institute of Mental Health, Department of Education, the Department of Health and Human Services’ Assistant Secretary for Planning and Evaluation, Social Security Administration, and Department of state. She also has worked with foundations, city governments, and universities. Daley designs and conducts research in behavioral health, from qualitative and mixed-methods studies and survey design to evaluability assessments.

Dr. Kerry Hofer has almost 20 years of experience conducting rigorous research in early childhood settings. Dr. Hofer has in-depth knowledge of large-scale childcare programs, including public state-run prekindergarten programs and Head Start/Early Head Start, as well as more informal care settings.  She has worked with early educational programs and staff across the country.  Dr. Hofer has been a key member on several large-scale projects funded by organizations such as the U.S. Department of Education and the National Institutes of Health, primarily focusing on analytic techniques with quantitative data. The majority of her research involves rigorous quantitative evaluations of early educational programs and practices targeted at children from impoverished families, focusing on program impact and model delivery.

Caroline G. Staub, Ph.D., is an analytical and strategic international development professional with 10-plus years leading programs in climate change adaptation and resilience, environmental science, natural resources management, sustainable agriculture, and food security. Her work tends to address finite, fragile, and/or remote geographical settings. She has extensive experience leading cross-functional, multi-cultural teams, trainees, and public/private partnerships in support of projects that incorporate critical thinking and capacity building to inform course corrections and ensure accountability and sustainability.

Alexandra Nastase is the Chief Technical Director, based in London. She has more than 15 years of experience in design, implementation, and evaluation of large reform and technical assistance programs to improve public sector performance and strengthen civil society.Nastase has held leadership and senior advisory roles for multi-million technical assistance programs funded by World Bank, European Commission, World Food Programme, Bill and Melinda Gates Foundation, Australian Department for Foreign Affairs and Trade, United Nations Development Program, and the UK’s Foreign, Commonwealth, and Development Office (FCDO).

Hannah Betesh has over a decade of experience designing, managing, and conducting rigorous implementation and impact studies of interventions for low-income workers and families, including programs that address substance use disorder. Betesh’s methodological expertise is in measuring and documenting program implementation to support adoption of evidence-based practices. Her federal clients have included the Administration for Children and Families (ACF), the Department of Labor (DOL), and the Department of Justice (DOJ).

Nduka Iwuchukwu is a Medical Doctor with more than 30 years of experience in clinical care, public health, safety, environment, and innovation management. He has provided technical assistance on vector control interventions to National Malaria  Programs in Nigeria, Malawi, Tanzania, Zambia, and Guatemala. He has developed several innovations in malaria vector control including indoor residual spraying (IRS) supervision and monitoring tools, field operational protocols, and novel designs for implementing community-based IRS operations.

Rosa Amboage is an environmental economist with 10 years of experience expanding markets for nature-based solutions (NbS) to achieve climate, economic and social progress. Working across academic, private, and public sectors, her expertise includes land use policy, NbS, environmental markets, green finance, and natural resource management.Amboage contributed to the UK’s post-Brexit agri-environmental policies and designed its first national scheme promoting a natural capital approach to economic and climate goals. Before Abt, she was the lead economist of the £640M GBP ($740M USD) Nature for Climate Fund, a national program to help industries and communities realize net-zero ambitions.

David Kaz, a principal associate in Abt’s Social and Economic Policy Division, has nearly 20 years of experience providing technical assistance, training, research, and policy analysis. He has worked on a wide range of programs and policies that affect low-income populations. He has directed, designed, and conducted both large- and small-scale, multi-faceted technical assistance projects for federal and state agencies and other clients and stakeholders. Clients have included the U.S. Department of Agriculture (USDA) Food and Nutrition Service, Washington State’s Department of Social and Health Services, King County, and the City of Seattle. He has worked on workforce legislation with members of Congress.