James L. Green

James L. Green is an American physicist and retired NASA Chief Scientist who served over 40 years at the agency. He earned his Ph.D. in Space Physics from the University of Iowa in 1979 and joined NASA's Marshall Space Flight Center in 1980, later directing the Planetary Science Division from 2006 and serving as Chief Scientist from 2018 until his retirement in 2022. He is known for overseeing major missions including New Horizons, Juno, and Curiosity. He is currently affiliated with IM8 as a scientific advisory board member and works on applying space-derived science to health and longevity research.