Acting Director (he/him)
Jason John joined Sierra Club California in 2023 as the chapter's Associate Director to lead state-level campaigns and initiatives related to renewable energy, transportation, and industrial decarbonization. He also manages the strategy for the organization's California 30x30 campaign and forestry work. Previously, he was the Science and Policy Lead for the Biodiversity and Habitat team at the California Natural Resources Agency, where he worked on 30x30 California and other habitat restoration initiatives. Jason received his Ph.D. in Physiological Ecology from the University of California Santa Cruz, working in a broad range of habitats from California to Antarctica. In his spare time, Jason enjoys cooking, hiking, and traveling with his wife Tamara.