Our Team

Daniel C. Esty is the Hillhouse Professor of Environmental Law and Policy.  As a professor at Yale since 1994, he holds faculty appointments in both Yale’s Environment and Law Schools and directs the Yale Center for Environmental Law and Policy and serves on the Board of the Center for Business & Environment at Yale, which he founded in 2006. He has an BA from Harvard College, an MA from Balliol College at Oxford University where he was a Rhodes Scholar, and a JD from Yale Law School.

More information coming soon. 

Lillie Steinhauser (they/she) is a graduate of UT Austin and the Administrative Director at YCELP.

Dr. Etienne Berthet is a Postdoctoral Associate at the MIT Center for Sustainability Science and Strategy (CS3), where his research focuses on integrated modeling frameworks that link global economic systems with environmental, agricultural, and water dynamics to support resilient policy. He also provides scientific guidance on the development of the Global Commons Stewardship Index in collaboration with the Yale Center for Environmental Law and Policy. 

Dr. Zachary A. Wendling is the Research Director for the 2026 Environmental Performance Index at the Yale Center for Environmental Law & Policy, where he did his post-doctoral training. Before returning to Yale, he was a Senior Research Associate at the Center on Global Energy Policy at Columbia University and the project manager for the Global Commons Stewardship Index at the Sustainable Development Solutions Network. 

Katie works to support the center’s research projects and Director Dan Esty’s work.