Microbial Ecologist – NASA Ames Research Center
Scientist – NASA Goddard Space Flight Center
Scientist – Planetary Science Institute
Scientist – Johns Hopkins University Applied Physics Laboratory
Planetary Scientist – Jet Propulsion Laboratory
Research Scientist – SETI Institute and NASA Ames Research Center
Research Astrophysicist – Goddard Space Flight Center
Director – Marshall Space Flight Center
Research Scientist – NASA Ames Research Center
Director, Department of Sensor Systems and Nondestructive Evaluation – Southwest Research Institute
