Stephenne leads National Geographic Society’s work to inspire policymakers to adopt ambitious, science-based targets to protect 30% of the planet by 2030 at the Convention on Biological Diversity COP in China in 2020. Previously, Stephenne served as a Senior Policy Advisor for U.S. Senator Tom Udall, where she led the charge to defend the Antiquities Act, protect Chaco Canyon, reauthorize international debt for nature swaps, and reform the 1872 mining law. Before that, she was an Associate Director at the White House Council on Environmental Quality, Deputy Director at the Department of the Interior, and a Policy Adviser to Senator Jon Tester (D-MT). She holds a Master’s in Public Administration from the Maxwell School at Syracuse University and an undergraduate degree from Willamette University.