He has served as Project
Manager in the European Community AERONOX program, as a member of the U.S. National Academy of Sciences / National Research Council Panel on Atmospheric Effects of Stratospheric Aircraft, as Chairman of ICAO / CAEP / WG3 (emissions) Technology and Certification
Subgroup, and as lead author in the World Meteorological Organization's Scientific Assessment of Ozone Depletion (1994)-RRB- David J. Griggs (Head of the IPCC Working Group I Technical Support Unit at the Hadley Centre, UK Meteorological Office), David J. Dokken (Project Administrator of the IPCC Working Group II Technical Support Unit, Washington, DC, USA) and Mack McFarland (Principal Scientist in
Environmental Programs at DuPont Fluoroproducts, Wilmington, DE, USA).