Planetary geologist
U.S. Geological Survey
Menlo Park, Cal.
Professor of psychiatry
University of Pennsylvania
Team leader
Neurobehavioral and psychosocial factors research , National
Space Biomedical Research Institute.
Professor of radiation oncology
University of Pennsylvania.
Radiation effects researcher
Associate scientist
Brookhaven National Laboratory,
lab liaison with NASA.
Manager
Biobehavioral Laboratory, Human Adaptation and Countermeasures
Office, Johnson Space Center
Associate team leader
Neurobehavioral and psychosocial factors research, National Space Biomedical Research Institute.
President, board of directors
Mars Society.
denotes fact-checker