Terrence O’Brien was Chairperson of the Sierra Nevada Conservancy from 2018 to 2024. He was a Senior Environmental Consultant at Environmental Resources Management from 2012 to 2014. O’Brien was Senior Advisor for Forests to Governor Brown in 2018. O’Brien was Environmental and Compliance Advisor to the U.S. Bureau of Land Management on Renewable Energy Development in the Western U.S. from 2012 to 2013. He was Deputy Director of the Environmental Protection and Siting Division at the California Energy Commission from 2002 to 2011. O’Brien was Chief Advisor to the Chairman of the California Energy Commission from 2000 to 2002. He earned a Bachelor of Arts degree in Geography from the University of California, Berkeley and a Master of Arts degree in Geography from the University of California, Davis.