 In this position, Dr. Soffen was responsible for the agency-wide program to monitor and maintain the physical well being of NASA astronauts in space, as well as the Biomedical Program, the Space Biology Program, and the Exobiology (also sometimes called the Astrobiology) program.In 1983, Soffen transferred from NASA Headquarters to NASA Goddard Space Flight Center (GSFC) in Greenbelt, Maryland.Initially, his role at GSFC focused on establishing the "Mission to Planet Earth" program; Soffen also served as the project scientist for NASA's Earth Observing System as that program was starting.