NIH Advisory Committee to the Director, Recombinant DNA Research

NRC-NAS Commission on Human Resources

UCI Committee on Undergraduate Scholarships, Honors and Financial Awards UCI Academic Senate

NCAR Scientific Programs Evaluation Committee, Panel Review of Atmospheric Chemistry Division, Boulder, CO

UCR Ad Hoc Committee for Review of the Statewide Air Pollution Research Center, Riverside, CA

NASA Advisory Committee to Oversee the Scientific Assessment of Atmospheric Effects Associated with Stratospheric Emissions from High Speed Civil Transports

Editorial Advisory Board of the International Journal of Chemical Kinetics

DOE Review Panel for the Molecular Science Research Center at the Pacific Northwest Laboratories, Batelle, Richland, WA

NOAA Review Panel for the Aeronomy Laboratory (Chair)

NSF Advisory Committee for Atmospheric Sciences

NRC-NAS Steering Committee on Aeronautical Technologies

NRC-NAS Committee on Atmospheric Chemistry

NSF Advisory Committee for Geosciences

President's Committee of Advisors on Science and Technology (PCAST)

Advisory Panel of Atmospheric Chemistry Division, National Center for Atmospheric Research

Miembro, MIT International Council

Miembro, MIT Council on the Environment

Miembro, MIT Task Force on Student Life and Learning

Miembro, Editorial Advisory Board of Accounts of Chemical Research

Miembro, Board of Directors, Northeast State Clean Air Foundation

Advisor to the Camille and Henry Dreyfus Foundation (Environ. Program)

Chair, Advisory Board, United Nations Environment Programme Regional Office for North America (UNEP/RONA)

Miembro, Board of Governors, US-Mexico Foundation for Science

Miembro, Board of Directors, Union of Concerned Scientists

Miembro, Steering Committee, MIT Consortium on Global Environmental Challenges

Miembro, The President's Committee on the National Medal of Science

Miembro, National Research Council Board on Environmental Studies and Toxicology

Miembro, Secretary of Energy Advisory Board

Miembro, Advisory Editorial Board, Chemical Physics Letters

Miembro, Board of Trustees, Science Service

Miembro, Visiting Committee, Max Planck Institute for Chemistry

Miembro, National Research Council Board on Atmospheric Sciences and Climate

Miembro, College of Chemistry Advisory Board, University of California, Berkeley

Miembro, Advisory Board, Journal of Physical Chemistry 2002

Miembro, National Commission on Energy Policy

Chair, Scientific Advisory Council, Comisión Federal para la Protección contra Riesgos Sanitarios, Mexico

Miembro, Board of Directors, The John D. and Catherine T. MacArthur Foundation