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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.

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.

Mariandrea Chamorro has 20 years of experience managing international development programs. She has provided oversight for the high-quality and compliant execution of large flagship USAID programs while contributing to business development. Chamorro’s areas of expertise include prevention of vector-borne diseases, infectious diseases, maternal and child health, and health systems strengthening. Her clients have included the U.S. Agency for International Development (USAID), the Australian Department of Foreign Affairs and Trade (DFAT), and the UK’s Foreign Commonwealth & Development Office (FCDO). 

Chris Grier, Vice President, Legal and Risk, leads the legal, governance, privacy, insurance, contracts, innovative finance, risk, compliance, and audit functions supporting corporate and program operations of Abt Australia and Abt Britain across more than 30 countries. He is also the Company Secretary of Abt Australia and Abt Britain.

Andrew Alderdice has more than 35 years of experience working in the health and human services sectors in Australia, New Zealand and the Pacific and is currently leading Abt Global’s domestic programs and consultancy practice in Australia.Andrew has worked in a variety of roles, including as a consultant, executive manager and clinician. He has more than 25 years of experience in executive-level positions, including nearly nine years as director of a private management consulting business in Australia. He served as director of the Australian Government-funded health and HIV program in Papua New Guinea. Andrew has been the director of strategy for a regional health service, chief executive officer of a health and aged-care complex and director of a regional community health service.

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.

Lisanne F. Brown has more than 20 years of experience in public health evaluation and research and a background in epidemiologic and program evaluation methods. She has worked on numerous evaluation and applied research studies for local, state and federal agencies. Her areas of expertise include maternal and child health, health care access, integration of primary care and behavioral health, community-centered health homes, social determinants of health, mixed methods evaluation design and implementation, survey design, and evaluation capacity building.