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Melanie Metropolit is a public health strategist with more than 20 years of experience across federal health, research, and international development initiatives.

Baris Yener has more than 25 years of experience in executive leadership, growth strategy development, and organizational transformation. His business-development and project work has involved a wide range of clients, including the World Bank, Department of Defense, Department of Homeland Security, Centers for Disease Control and Prevention, and other private sector and federal agencies.As Chief Client Officer at Abt, Yener leads client strategy and growth to ensure the voice of the customer drives investment decisions, capability development, and market execution. 

Chris Long has over 35  years of management consulting and service delivery expertise in the public-sector market. At Abt, he is focused on shaping and driving delivery of strategy and transformation solutions to our clients. He provides executive oversight of operations, growth, delivery, and innovation, while fostering collaboration enterprise-wide.

ZeAmma Brathwaite has over 20 years of experience partnering with private organizations and federal agencies to improve access to care and health outcomes for individuals and communities. A certified project management professional, Brathwaite has extensive experience leading multidisciplinary teams in the design, implementation, and evaluation of complex, large-scale transformation efforts using improvement science methods and tools to accelerate change.

Lisa Simeon is Abt Global’s Chief Operations Officer.  In this role, Simeon is establishing a global operations function to cover all aspects of project management. It will include continuous improvement and scalability of Abt’s standards, processes, and digital platforms for project start-up and closeout, workforce planning, risk management, and quality review to achieve strong financial performance and ensure client satisfaction across the company. She will continue to oversee Human Resources and will add responsibility for global security operations and emergency response to her portfolio.

Catherine Hersey, a senior associate, is a seasoned health services researcher and project manager with over 15 years of experience in both Medicare and Medicaid. Her research areas include the implementation and evaluation of accountable care organizations and other alternative payment models, maternal health, substance use disorder, meaningful use of electronic health records, and hospital-acquired infections. Hersey also has experience in quality measurement and improvement. In addition, she has experience in both quantitative and qualitative analyses and managing large and complex projects.

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.

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.

Tenly Snow is a senior digital solutions specialist with 15 years of expertise in digital transformation, supply chain management, and strategic solutioning. Her extensive collaborations span governmental, private sector, and non-profit organizations across the Middle East, Asia, Africa, and Europe. Through her work with USAID, the Bill and Melinda Gates Foundation, and the World Bank, Snow has spearheaded innovations in software development and digital health, significantly enhancing health system resilience and pandemic preparedness on a global scale.