NASA Johnson Space Center, Houston,TX
Researcher, Space Shuttle Environmental Effects Project Office
NASA Goddard Space Flight Center, Greenbelt, MD
Atmospheric Physicist, National Research Council, Resident Research Associate, Laboratory for Planetary Atmospheres
Technical Staff, Advance Missions & Interdisciplinary Science
NASA Headquarters, Washington D.C. Program Manager, Stratospheric Theory and Data Analysis, Earth Science and Applications Division
Program Manager, Solar-Terrestrial Theory and Advanced Planner, Earth Science and Applications Division
Division Director, Modeling, Data and Information Systems, Office of Mission to Planet Earth
Division Director, Operations, Data and Information Systems, Office of Mission to Planet Earth
Program Scientist, Mission to Planet Earth
Chief Scientist, The GLOBE Program
Deputy Director, The GLOBE Program
Director and NASA Program Manager, The GLOBE Program
