- Chair, Department of Energy Basic Energy Sciences Workshop on Solar Energy Utilization, April 2006
- Helios Steering Committee; Helios Advisory Committee, Berkeley, CA, January 2006
- Consultant, Q Network, Renewable Energy, January 11, 2006
- Member, Annex-20 Expert Group on Solar Fuels, Advisor to G-8 Countries on Renewable Energy Research, January 15, 2006
- Leader, JASON Study, Reducing DoD Fossil Fuel Dependence, briefed to Undersecretary of Defense and Defense Science Board, January 20, 2006
- Leadership Council, CALEAP (Prop 87) Clean Alternative Energy Act, CA, January 2006
- ACS CCPA Policy Statement on Energy, March 23, 2006
- BP Technology Advisory Council; brief Lord John Browne and Directors of BP on Renewable Energy and Energy Biosciences, April 1, 2006
- Selection Committee, Link Energy Foundation Graduate Energy Fellowship April 11, 2006
- Member, U.S. National Research Council Panel on Benchmarking the Research Competitiveness of the U.S., April 18, 2006
- Member, IEA Hydrogen Implementing Agreement, April 19, 2007
- Juror, Heinz Foundation Awards, Pittsburgh, PA May 10, 2006
- Selection Committee, Fresenius Award, May 11, 2006
- Member, Sante Fe Institute-NREL Working Group on Sustainable Energy, June 29, 2006
- Consultant, Automotive X-Prize,July 28, 2006
- Organizing Committee, SPIE Conf on Solar Hydrogen and Nanotechnology II, Sept. 20, 2006
- Advisory Board, International Symposium on the Hydrogen Economy, September 20, 2006
- Member, Advisory Board for the WilderHill New Energy Global Innovation Index (NEX) November 13, 2006
- Advisor, The NOW Plan for Energy and Climate Change, Marshall Herskovitz, Santa Monica, CA November 15, 2006
- External Advisory Board, F. Seitz Materials Research Laboratory at University of Illinois, Urbana, IL December 1, 2006
- Selection Committee, Environment Now Award for Top Achievements of the Environmental Community in Southern California for 2006 February 8, 2007
- Member, Selection committee, Gerischer Award
- Member, Editorial Board of Chemical Reviews
- Member, WASC Study Committee on Undergraduate Education
- Chair, Science Advisory Board, Stion Solar Corp., Sept 2007
- Chairman, scientific advisory board, Stion Solar Co, Menlo Park, CA, November 7, 2007
- Member, Editorial Advisory Board of the journal ChemSusChem
- Member, WilderHill New Energy Global Innovation Index Advisory Board
- Member, Advisory board of Wilder Transport Index LLC
- Member, California's Energy Future
- Member, HAUL Index advisory board
- Member, ChemSusChem editorial board
- Member, Science Advisory Board of the Museum of Science and Industry, Energy Exhibit
- Member, American Physical Society Panel on Public Affairs (study: Capture of CO2 Directly from the Atmosphere and from Flue Gas)
- Chair, Gordon Conference on Renewable Energy: Solar Fuels, Ventura, CA, February 2-5, 2009.
- Co-chair, 21st Century Nanoscience Committee on Energy.
- Member, MOSI Advisory Board for Informal Science Education Energy grant.
- Member, International Advisory Board of CIMTEC 2010.
- Member, Selection committee for the 2009 World Technology Awards
- Member, Search committee for new directory of the ACS Petroleum Research Fund
- Member, Caltech Core Curriculum Committee Steering Committee
- Member, ARPA-E Blue Ribbon Review Panel
