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Dr. Reerink has more than 25 years of experience in promoting gender equality and social inclusion in international development, with a strong focus on the Asia-Pacific region.

Dr. Jonathan Dorn has more than 20 years of experience in the environment and energy space. He specializesin air pollutant emissions inventory development, air quality, data visualization, regulatory program support, energy systems, and air pollutant mitigation strategies.

William Tuleu leads strategic growth initiatives across the company's U.S. foreign assistance and domestic portfolios.

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.

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.

Nichole Fiore is a Principal Associate with over 15 years of experience evaluating housing and homelessness programs across the country, developing deep expertise on homeless service systems, organizational capacity, political and community will, unsheltered homelessness, and permanent supportive housing. Recognizing the critical link between stable, safe housing and overall well-being, Fiore is proven leader bringing together stakeholders who work across many jurisdictions and sectors to address the needs and improve the lives of people experiencing homelessness. She is a regular source for media outlets, often on the topic of homelessness in California.

Kate Stillman is a technical leader with more than 25 years of experience in program design, systems thinking, evidence generation and use, monitoring, evaluation and learning, and project management. She has deep experience in global development with specialties in health systems strengthening, infectious and vector-borne diseases, maternal and child health, and sustainability. She drives Abt’s efforts to strengthen the generation, management, and use of high-quality data to inform decisions and improve program quality.

Gary L. Perlin, the retired chief financial officer of Capital One Financial Corporation, is the non-executive chairman of Abt Global’s Board of Directors.Perlin has more than three decades of experience in senior finance roles in for-profit and not-for-profit organizations. As CFO of Capital One – one of the largest financial services companies in the nation – Perlin was responsible for the company’s overall financial management. He was named “Best Finance Company CFO” for four years by Institutional Investor magazine between 2007 and 2011.

Ernest Fletcher is an international development professional with 15 years’ experience in the planning, implementation, and management of education and public health programs. He has a special interest in program design, implementation, and monitoring and evaluation and capacity building. He has worked in Ghana and Mozambique and provided remote vector control program implementation support to countries including Senegal, Madagascar, Burkina Faso, and Sierra Leone. He has worked closely with Ministry of Education (Ghana) and Ministry of Health staff in several countries.