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James Gilling, regional vice president, East Asia and Pacific, has 35 years of experience in social and economic development in low- and middle-income countries. He has overseen Australian aid programs worth hundreds of millions of dollars and managed large teams of Australian and overseas staff, including as head of the Australian aid program in Indonesia. James has worked for United Kingdom (UK) and Papua New Guinea governments as an agricultural economist. He has also worked as a consultant economist with Oxford Policy Management in the UK and was an economic analyst with the Office of National Assessments in Australia.

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). 

Jessen Carroll is a human resources (HR) professional with more than 20 years of experience overseeing all aspects of HR, organizational communications, governance, and administration functions. She has experience leading organizational integrations and change management efforts. She also has operations management, business analysis, business process improvement, and project management experience. She can balance tactical day-to-day operational needs with a strategic grasp of long-term business objectives. 

Diane Paulsell is an applied social scientist with more than 20 years of experience designing, conducting, and overseeing mixed-methods policy-focused research, including national multi-site studies. She has also led rapid cycle learning and program improvement efforts with a variety of human services programs and a foundation-funded research program on family supportive services. Her areas of expertise range from early care and education to parenting, family engagement, youth development and family supportive policies and programs, including nutrition.

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.

Eric Reading leads major initiatives at the enterprise level for Abt Global, particularly in areas of strategic priority including digital transformation. He previously led Abt Global’s International Development Division, the largest division of the firm.

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.

Lauren Pittenger comes to Abt with more than 20 years of experience working in or as a consultant to federal government agencies. She has strong grounding in research and research-based consulting to government clients. She also has extensive experience leading and growing business, managing technical and scientific projects, and coaching and supporting account teams. She has served as a director at Guidehouse, scientific program manager at Booz Allen Hamilton, and lab manager at the U.S. Department of Agriculture. She has worked with the Centers for Disease Control and Prevention (CDC), Food and Drug Administration (FDA), the Canadian Public Health Laboratory Network, the Gates Foundation and the Association of Public Health Laboratories.

Eduardo Castellon has two decades of experience helping public sector clients—from the U.S. Agency for International Development (USAID) and the U.S. Postal Service (USPS) to the Department of Housing and Urban Development—grow and refine their operations and impact. He has extensive experience delivering consulting expertise focused on artificial intelligence (AI), supply chain, procurement, financial management, and advanced analytics. His technological, consultative, and entrepreneurial skills help clients find new ways to address challenges ranging from affordable housing to homelessness to guaranteed income. He also has extensive expertise in technical assistance and implementation (TA&I) approaches. And his management experience includes developing high-performing teams through skills and career development and succession planning.

Kevin O’Reilly is Abt’s principal accounting officer and a member of both the Pension and 401(k) Advisory Committees. He oversees financial reporting, global tax compliance, government accounting compliance, retirement services, billing, general accounting, payroll and accounts payable. O’Reilly joined Abt Global from Ropes & Gray, LLP, an $800-million law firm, where he was director of finance. Earlier in his career, O’Reilly spent more than 12 years in progressively more responsible roles at Private Healthcare Systems, Inc. He began as manager of accounting and was vice president and controller before the company was sold. O’Reilly also serves as the chairman of the advisory board at St. Francis Xavier School.