Board certified Internal and Aerospace Medicine. 9 years as NASA flight surgeon 1991 - 2000. Joined astronaut office in 2000. Flight experience short duration (STS-133 Space Shuttle Discovery) and long duration (ISS Expeditions 19 and 20). Extensive experience with Russian medical programs, ISS payloads. Lead medical rep for astronaut office; associate editor for space medicine, Aerospace Med and Human Performance; Senior editor for text Principles of Clinical Medicine for Space Flight. Internationally recognized space medicine curmudgeon.