Trained as a physician and development economist, Dr. Neil Buddy Shah is an award-winning social entrepreneur, CEO, and global health funder who is passionate about making global health efforts as impactful as possible.

Dr. Shah was previously the Managing Director of GiveWell, a research and funding organization that directs hundreds of millions of dollars per year to programs in global health and development. GiveWell seeks to identify and fund the most cost-effective ways to save lives, and has recently emerged as one of the world’s largest private funders in global health.

Dr. Shah was previously co-founder, CEO, and now Board Chair of IDinsight, a global development data analytics and advisory firm with offices across Africa, Asia, and the US. At IDinsight, he helped pioneer the practical application of cutting-edge data and impact measurement tools such as randomized controlled trials, machine learning and results-based financing mechanisms to improve the impact of life-saving and antipoverty programs across Africa and Asia. Buddy worked previously at the World Bank and MIT’s Jameel Poverty Action Lab.

Buddy holds an AB in economics from Harvard, an MD with special distinction in global health policy from Einstein College of Medicine in New York, and an MPA in International Development from Harvard Kennedy School.

Dr. Shah is the Chair of Anthropic AI’s Long-Term Benefit Trust, and serves on the boards of Prevail Fund; the Institute to End Mass Incarceration at Harvard Law School; Educate Girls; Giving Green; and IDinsight. He was previously on the board at The Global Fund to Fight AIDS, Tuberculsosis, and Malaria. He is a term member of the Council on Foreign Relations, has served as guest faculty at Harvard Kennedy School and Stanford’s Graduate School of Business, and is a former Echoing Green Fellow and Forbes’ 30 under 30 Social Entrepreneur. He has lived and worked in India, Cambodia, Uganda, and the United States.

Rasha Hibri is the Chief Financial Officer (CFO) at the Clinton Health Access Initiative, Inc (CHAI). She joined CHAI in 2020 and oversees CHAI’s global finance strategy and global financial operations including Budgets and Reporting, Business System Applications, Contracts, the International Controller’s Office (including Accounting, Payroll, and Accounts Payable), Internal Audit and Risk Management, Treasury, and Office Administration.

Prior to joining CHAI, Ms. Hibri was the CFO for India, Middle East and Africa for Allergan. In 2019, she was assigned as Acting Country Manager for India. From 2015 to 2018, Ms. Hibri was the CFO for the Middle East and North Africa region at British Telecoms Global Services. She has also worked as CFO for Eli Lilly and Company in the region and as Finance Director for Merck Sharp and Dohme (MSD), where she led growth initiatives and assessed customer needs, in addition to optimizing resource efficiency and effectiveness.

Joshua Chu is the Chief Operating Officer at the Clinton Health Access Initiative (CHAI). In this role, he oversees global operations, including Program Performance, Talent Development, Information Technology, Safeguarding and Operational Risk Management. He also leads cross-cutting initiatives to enhance organizational effectiveness and efficiency.

Mr. Chu joined CHAI in 2009, starting as the Deputy Country Director in Nigeria. He later took on the role of Senior Regional Program Director for Southeast Asia, where he successfully facilitated the development of new programs across Cambodia, China, Indonesia, Laos, Myanmar, Papua New Guinea, and Vietnam. As Executive Vice President of Vaccines and Non-Communicable Diseases (NCDs), Mr. Chu spearheaded efforts to improve immunization coverage, playing a key role in negotiating vaccine price reductions that resulted in over $1 billion in procurement savings for governments and global partners. He also led the development of CHAI’s newest programs for the prevention, diagnosis, and treatment of non-communicable diseases and expanded the use of assistive technologies for individuals with disabilities.

Before joining CHAI, Joshua held various key roles, including managing Singapore Airlines’ multi-billion dollar investment and fuel hedging portfolio. His extensive professional experience spans work in China, Malaysia, Nigeria, Singapore, the United States, and Zambia.

Mr. Chu earned his BS in Economics and BA in Middle Eastern and Asian Studies (summa cum laude) from the Wharton School of the University of Pennsylvania. He later obtained an MPhil in Development Studies (with distinction) from St. John’s College, University of Cambridge, as a Maxis Scholar.

Samantha Diamond oversees CHAI’s work in health systems strengthening as well as non-communicable diseases. Ms. Diamond joined CHAI in 2011 to work with the Ministry of Health in Haiti on aid coordination and systems strengthening. She went on to play a key role in the expansion of CHAI’s work from HIV financing to sustainable health financing. She most recently served as Senior Director, Health Financing, working with CHAI offices, governments, and partners across Africa and Asia to address financial barriers to the availability and affordability of essential health services. Samantha holds an MPH and is an advanced DrPH candidate in health systems.

In her role as Vice President, Integration, Dr. Olufunke Fasawe plays a crucial role in the strategic alignment and coordination of various health programs and initiatives to ensure cohesive and efficient delivery of services in response to Governments’ priorities. In this role, she manages cross-functional teams, fosters partnerships to ensure that program objectives are met in line with CHAI’s mission and guiding principles to maximize impact.

Dr. Fasawe is committed to health equity and women’s and girls’ empowerment and is deeply passionate about improving healthcare services in Africa, particularly in Nigeria, where she led the CHAI’s SRMNH portfolio for almost a decade, also doubling as Director of Programs for the Nigeria office. Before joining CHAI in 2012, she worked as a health economics consultant at the Joint United Nations Programme on HIV/AIDS (UNAIDS) in Geneva.

Dr. Fasawe holds a Bachelor of Dental Surgery from the University of Lagos, Nigeria, a Master’s degree in International Health Management, Economics, and Policy from Bocconi University, Milan, Italy, and a Doctor of Public Health (DrPH) degree from the University of California, Berkeley. She also earned a professional certificate in Leadership, Engagement, Acceleration, and Disruption (LEAD) from Stanford University’s Graduate School of Business.

Dr. David Ripin leads efforts at CHAI to improve access to medicines and diagnostics for diseases like HIV, malaria, and tuberculosis, through sustainable market interventions. Under his leadership, CHAI has implemented agreements with pharmaceutical companies reducing prices of key drugs and diagnostics by up to 80 percent.

Joining CHAI in 2007, Dr. Ripin initially led the Pharmaceutical Sciences team, which was focused on reducing the cost of key drugs through recommending formulation, manufacturing process, and sourcing improvements, as well as conducting the transfer of these processes to manufacturing partners. Before joining CHAI, he worked at Pfizer, Inc., contributing to drug commercialization and manufacturing.

Dr. Ripin holds a Bachelor of Science in Chemistry and Asian Studies from Washington University in St. Louis and earned his Ph.D. in Chemistry from Harvard University.

Carolyn has been at CHAI for 13 years, and prior to her current role she also worked in global market intelligence and led the country support team, while based in South Africa. A major focus of Carolyn’s career at CHAI is accelerating access to and uptake of drug and diagnostic innovations for people living with or at risk of HIV in low- and middle-income countries around the world.

Rahel Belete is the Vice President and Country Director of the Clinton Health Access Initiative (CHAI) Ethiopia who is responsible to lead and manage the Ethiopia office, strategically aligning the country’s programs with the overall CHAI program strategy, programmatic and financial planning/reporting, fundraising, and monitoring and evaluation efforts for all work areas. She manages relationships across all stakeholders ranging from Government leadership, Ministry technical experts, in country partners, to global counterparts within CHAI and donors.

Rahel joined CHAI in 2012 and prior to assuming her current role, she served as Senior Deputy Country Director in Ethiopia. During her tenure she diversified the donor mix, expanded programs scope to include new thematic areas such as essential treatment for diarrhea, oxygen and breast cancer. She has developed systems, procedures, protocols, provided leadership and management to the organization and align the strategic direction along with the government strategic priorities.

Prior to joining CHAI, she worked for Marie Stopes International- Tanzania for five years as a Deputy Country Director and spent eight years with DKT Ethiopia, leading the marketing and communication innovations of the varied social marketing programs and products.

Rahel holds a PhD from Bulacan State University of the Philippines in Business Administration, Masters in Organizational Leadership from Azusa Pacific University, California, MBA and BA from Pune University in India.

Dr. Justin Cohen leads the malaria and neglected tropical disease program. Justin is an infectious disease epidemiologist who earned his doctorate in Epidemiological Science and MPH in International Health from the University of Michigan and studied Molecular, Cellular, and Developmental Biology at Yale University. He serves on the advisory board of the Malaria Atlas Project, was on the steering committee of the Gates Foundation’s Malaria Modeling Consortium, and co-authored WHO’s Framework for Malaria Elimination and Manual for Elimination Scenario Planning, amongst other guidance documents. He has published over 50 peer reviewed articles related to the theory and practice of malaria elimination and program optimization.

Harkesh Dabas is Managing Director, William J Clinton Foundation (Standing Invitee of CHAI India Affiliate). In this role, he provides leadership and strategic direction to CHAI operations and partnerships in India. Previously, Mr. Dabas led CHAI’s Access program efforts in new initiatives and organizational engagement with manufacturers of generic ARVs as well as other drug and vaccines.

Prior to joining CHAI, Mr. Dabas served in the Indian Navy for over two decades in various leadership positions, including Joint Director of Operations at the Ministry of Defence, where he was responsible for the development and execution of strategic plans and policies. He also commanded an anti-submarine warfare corvette and served as the Secretary to the Commanders’ Conference, the Navy’s highest strategic decision-making body, wherein he was involved in the development of strategy across a broad spectrum of issues.

Mr. Dabas holds post-graduate degrees in Nautical Science and Operations, a Masters in Defence and Strategic Studies, and a Masters in Business Administration from the Indian Institute of Management, Ahmedabad.

Caitlin Glover leads the Women’s and Newborn Health cluster, which strives to end preventable maternal and newborn mortality and increase access to contraception and high-quality reproductive health care. Caitlin is a public health leader with 15 years of experience developing and executing programs to improve the health of women and infants across more than 15 countries in Africa and Asia. Prior to joining CHAI, Caitlin spent extensive time in rural Kenya to help establish the Lwala Community Alliance, a community-led organization that aims to unlock the potential of communities to advance their own comprehensive well-being. Caitlin is a graduate of Dartmouth College and holds a master’s degree in public health from Columbia University. She is an active volunteer at Feeding Tampa Bay.

Zachary Katz is the Vice President of Child Health, leading CHAI’s efforts to prevent childhood mortality from preventable causes through its programming on diarrhea, pneumonia, vaccines, and nutrition. Zach also leads CHAI’s portfolio on access to oxygen. He joined CHAI in 2006, establishing its Papua New Guinea office and supporting the launch of the national pediatric HIV treatment program. Zach later managed CHAI’s programs in Cambodia and Southeast Asia, and later led the Laboratory Services team, expanding access to key HIV and tuberculosis diagnostics. From 2016 to 2020, he was the Chief Access Officer at the Foundation for Innovative New Diagnostics (FIND). Zach holds a BA in Geology from Carleton College and a Master’s in Public Administration from NYU. He is based in Geneva, Switzerland.

Neel Lakhani has over a decade of experience propelling strategic innovation across the global health organization. During his 13-year CHAI tenure, Neel has been a leader in the Global Markets Team, negotiating agreements to accelerate access to top pharmaceutical products and developing innovative pricing that dramatically reduced the costs of essential health commodities. He currently leads CHAI’s Maximum Impact Incubator, which aims to scale the most highly cost-effective evidence-based interventions in public health. Neel is a Cornell University alumnus, holding an MBA and Master’s in Industrial and Labor Relations.

Marie Chantale Lépine is a lawyer and former biopharmaceutical company executive. She joined CHAI’s Global Markets Team in 2015 as Special Advisor, spearheading various high impact market shaping initiatives. She now leads CHAI’s strategic market shaping undertakings across program areas, accelerating the development and market introduction of health products optimized for low- and middle-income country settings and creating sustainable marketplaces to increase equitable access to safe and efficacious health products in those settings.

Gerald Macharia joined CHAI in 2005 to establish the organization’s Kenya office and now leads operations across Kenya, Lesotho, Malawi, Mozambique, Rwanda, South Africa, Swaziland, Tanzania, Uganda, Zambia, and Zimbabwe. Previously, he served as CEO of Faulu Kenya, transforming the small NGO program into one of East Africa’s leading microfinance institutions. His innovative work with the Vodafone Group helped pioneer the award-winning M-Pesa money transfer system. Mr. Macharia has held key roles in various microfinance associations and currently serves on the board of Kenya’s Micro Enterprise Support Program Trust. He holds degrees from Kenyatta University, the Chartered Institute of Marketing (UK), Edinburgh Business School, Moi University School of Business & Economics, and has completed Stanford University’s Graduate School of Business Program of Strategy & Organization.

Dang Ngo is the Vice President for Asia Pacific, overseeing operations and strategic priorities in Cambodia, China, Laos, Indonesia, Myanmar, Papua New Guinea, and Vietnam, and covering initiatives including hypertension, diabetes, cancer, HIV, TB, malaria, hepatitis, vaccines, sexual and reproductive health, assistive technologies, laboratory system, primary health care, and health information systems. Mr. Ngo is also CHAI’s Country Director in Vietnam, leading a high-performing team to significant successes including scaling up of HIV treatment coverage for children from 9 percent in 2006 to 86 percent in 2015, screening over 1.2 million presumptive TB cases and referring thousands to treatment via the CHAI-developed ACIS mobile platform, adding hepatitis C treatment to the social health insurance, accelerating malaria elimination from 15,752 cases in 2014 to 448 cases in 2023, among others.

Mr. Ngo joined CHAI in 2008 as a Program Coordinator in Vietnam and assumed the Deputy Country Director and Country Director roles in 2010 and 2011, respectively. He is also a member of CHAI’s Leadership Council.

Prior to joining CHAI, Mr. Ngo developed a landmine risk prediction model using statistical tools that changed the UN Mine Action Centre’s approach to reducing landmine incidences in Afghanistan. Additionally, he led the development of market-leading enterprise-level educational tools and websites to link students to universities. He is also an award-winning photographer.

As Vice President of People at CHAI, Elizabeth Wallis leads the organization’s talent strategy and people initiatives. In this role, she works closely with CHAI’s leadership and teams to foster a culture of engagement, inclusion, and operational excellence, ensuring that people strategies align with the organization’s mission and impact goals.

Elizabeth brings 22 years of experience in organizational development, talent strategy, and diversity and inclusion. Before joining CHAI, she was the Global Head of People and Talent Accelerator at LeapFrog Investments, helping organizations scale sustainably while embedding impactful workforce practices. She previously held leadership roles at EY’s People Advisory Services and Investec Bank, where she led large-scale talent transformation, culture, and integration initiatives. Earlier in her career, she founded Brain Health (SA), a neuroscience-based assessment and research initiative focused on cognitive and psychological well-being.

Elizabeth holds a Master’s in Social Science (Psychology) and a Bachelor of Arts Honours in Psychology. She also completed an MBA at the University of the Witwatersrand Business School and a Management Advancement Program at the same institution. She is currently pursuing a PhD in Behavioral Neuroeconomics at the University of Cape Town’s Graduate School of Business. Passionate about creating sustainable, systemic change, she believes that when people grow, organizations thrive—and when organizations are built with purpose, they can transform lives.