Hans Joachim Oskar Fichtner was a rocket scientist who worked on V-2 rockets for Wernher von Braun at Peenemünde from 1939 to 1945. He was among the scientists to surrender and travel to the United States to provide rocketry expertise via Operation Paperclip which took them first to Fort Bliss, Texas (1945–1949). He continued his work with the team when they moved to Redstone Arsenal, and he joined Marshall Space Flight Center to work for NASA.