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Susan Tierney, a Senior Advisor at Analysis Group, is an expert on energy economics, regulation, and policy, particularly in the electric and gas industries. She consults to businesses, government agencies, foundations, tribes, environmental groups, and other organizations on energy markets, economic and environmental regulation and strategy, and climate-related energy policies. She has participated as an expert in civil litigation cases, regulatory proceedings before state and federal agencies, and business consulting engagements. Previously, she served as the Assistant Secretary for Policy at the U.S. Department of Energy, and was the Secretary for Environmental Affairs in Massachusetts, Commissioner at the Massachusetts Department of Public Utilities, and Executive Director of the Massachusetts Energy Facilities Siting Council. She co-authored the energy chapter of the National Climate Assessment, and serves on the boards of ClimateWorks Foundation, Barr Foundation, Energy Foundation, Resources for the Future, and World Resources Institute. She taught at the Department of Urban Studies and Planning at MIT and at the University of California at Irvine, and has lectured at Harvard University, University of Chicago, Yale University, New York University, Tufts University, Northwestern University, and University of Michigan. She earned her Ph.D. and master’s in regional planning at Cornell University and her B.A. at Scripps College.​