Hannah graduated magna cum laude from Yale College in 2003 and received her J.D. from Yale Law School in 2007, after which she served as a clerk for Judge John T. Noonan, Jr. of the U.S. Court of Appeals for the Ninth Circuit. Before joining Earthjustice, she was an associate in the environment and general litigation groups of Arnold & Porter and served as Fellow and Deputy Director of Columbia Law School’s Center for Climate Change Law.