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Dr. Lianne Fisman is an experienced researcher and a recognized expert in qualitative and mixed method research design, and analysis. She specializes in evaluating and strengthening programs that support economically disadvantaged individuals and communities. Dr. Fisman currently leads Abt’s Qualitative and Mixed Methods sub-capability. During her tenure at Abt, Dr. Fisman has served as project director and task leader on projects related to a variety of policy areas, including housing, youth and community development, education, and financial wellness.

Marianne El-Khoury is a seasoned health professional with a proven track record of leading and managing large-scale health programs. At Abt, she has held senior management and technical roles on USG-funded projects in health systems strengthening, infectious diseases, and private sector health. She has also led research and evaluation studies in family planning and reproductive health, maternal and child health, and health financing.

David Cooley is an environmental scientist with more than 15 years of experience working in climate change and environmental management. His work has focused on the interactions between climate change mitigation, air pollution reductions, and improvements in public health. He has managed multiple projects for the U.S. Environmental Protection Agency (EPA), U.S. Agency for International Development, and the New York State Energy Research and Development Authority (NYSERDA) to evaluate opportunities to reduce greenhouse gas (GHG) and air pollutant emissions.

Matthew Eby has over 20 years of leadership experience in supporting life science research and consulting for military, federal public health, and international agencies. His diverse career spans basic and applied research on environmental bioremediation, designing nanomaterials to combat antimicrobial resistance, and protecting our nation against bioterrorism. He also led federal and international agencies in modernizing public health systems and pandemic response efforts. Clients have included the Air Force, Navy, Army, Defense Advanced Research Projects Agency, Centers for Disease Control and Prevention (CDC), Food and Drug Administration, National Institutes of Health, and United Arab Emirates. He  has authored more than 20 peer-reviewed publications with 1000+ citations. He also is an active supporter of local community initiatives that tackle affordable housing, food insecurity, and systemic poverty.

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.

Dr. Fiona Mactaggart is a multi-disciplinary technical advisor with more than 10 years of experience in monitoring, evaluation, research, and learning (MERL); infectious disease control; and public health. As a co-lead of Abt's MERL portfolio, she draws on complexity theory and scientific methods to help clients test what works, discover why it works, and provide timely evidence-based recommendations to inform important decisions about policy and practice. Mactaggart contributes to business development, programme delivery, and thought leadership. She works in five key areas: monitoring (e.g., design of digital tools and visualisation platforms) research (e.g., cross-sectional survey design), evaluation methodologies (e.g., contribution analysis), learning (e.g., portfolio level evidence-informed strategic decision making), and cross-cutting MERL capabilities (e.g., adaptive management and GEDSI). Mactaggart has worked extensively in the Pacific and Southeast Asia.

Brian Chirwa is an agricultural and environmental scientist with over three decades worth of experience working on projects funded by the World Bank, the U.S. President’s Malaria Initiative (PMI), the Environmental Council of Zambia, and the Southern African Development Community (SADC). He brings 18 years’ experience on PMI-funded projects focused on indoor residual spraying (IRS) and insecticide-treated nets (ITNs) and has provided technical leadership, assistance, and high-level management for country-wide Zambian IRS and ITN campaigns. Brian also has three decades' worth of experience designing environmental information systems (EIS) for public organizations.

In his career as a senior finance and operations executive, Rehberger most recently served as the Senior Vice President, Chief Financial Officer of Engility, a Virginia-based government contractor.  He held similar positions with TASC from 2010 until its merger with Engility in 2015.  Rehberger helped guide both companies as the government industry cycled through a severe downturn and recovery, counseling the Board of Directors regarding strategy, enterprise risk management, cyber security, and compensation.  He previously held executive positions with telecommunications firms XO Communications and MCI. In 2017, Virginia Business awarded Rehberger the Virginia CFO of the Year award for his outstanding commitment to financial stewardship and dedication to the success of Engility.

Lakshmi Shyam-Sunder is the former Vice President and World Bank Group Chief Risk Officer (2014-2024). Lakshmi was previously Chief Financial Officer at the Multilateral Investment Guarantee Agency (MIGA), and Director of Risk and Financial Policy at the International Finance Corporation both also part of the World Bank Group.