Payload Specialist on STS-83 (April 4-8, 1997) and STS-94 (July 1-17, 1997)
Senior Scientist - International Space Station
Senior Scientist - Office of Life and Microgravity Sciences, NASA-HQ
Lead Scientist - Microgravity Space and Applications Division
Program Scientist on five different Spacelab flights.
Co-chair - Microgravity Science Working Groups between NASA and space agencies from the European Union, France, Germany, Japan, and Russia.
Co-chair - International Microgravity Science Strategic Planning Group consisting of these space agencies plus Canada.
Group leader and researcher, NASA Langley Research Center.
Leader - research group investigating the effects of convection on semiconductor materials' properties.
Research in various techniques and types of semiconductor crystal growth, electric and optical properties of materials, electronic devices for remote sensing and flat panel displays, and heat shield protection for atmospheric reentry of space vehicles. This research resulted in the publication of over 40 technical paper and over 50 technical conference reports.