DR, William Wells is a Senior TB Technical Advisor at USAID, where he provides technical guidance globally and to individual countries on TB implementation, with a special focus on Public-Private Mix (PPM) and operations research. He regularly provides programmatic and work-planning guidance across all TB topics to USAID missions and projects in Bangladesh, Ethiopia, India, Indonesia, and Myanmar. He has contributed to international guidance on the End TB strategy, social protection, measurement of catastrophic costs for patients, and integration of TB activities into national health insurance. He is the past co-chair and current vice-chair of the Stop TB Partnership's working group on PPM, and has been a topic and/or team leader on national TB program reviews in Bangladesh, Indonesia, Kenya, Myanmar, Nigeria, Philippines, and South Africa.

He was formerly the Director, Market Access, at the Global Alliance for TB Drug Development (TB Alliance), where he had responsibility for planning and oversight of the organization's market readiness approach. The resulting research, intelligence, analysis, and stakeholder engagement had an end goal of ensuring successful adoption, availability, and affordability of improved TB regimens. Over several years, he has also provided technical assistance for WHO WPRO and its country offices in Cambodia, Fiji, Lao PDR, Papua New Guinea and the Philippines on HIV programming, Global Fund strategies, and cross-programmatic linkages.

William received his Ph.D. in cell biology from the University of California, San Francisco, and a Master of International Affairs, with a focus on economic and political development and public health, from Columbia University in New York.