Mark Shelhamer, ScD, is a pioneering human spaceflight researcher with backgrounds in electrical and biomedical engineering who specializes in sensorimotor function and neurovestibular adaptations. He is the principal investigator of the Johns Hopkins Human Spaceflight Laboratory, a professor of otolaryngology at the Johns Hopkins School of Medicine, and the former Chief Scientist of the Human Research Program at NASA's Johnson Space Center. Shelhamer serves as the Vice President for the Human Research Program for Civilian Spaceflight and as an advisor for the Organization for Space Medicine, Engineering, and Design.