By all accounts, the leading worker in Celestial Mechanics of the modern era. He single-handedly designed the Apollo moon missions, insisting NASA use the free-return trajectory. Once a spacecraft is on that flight path, it does not need fuel to return to Earth. So it was Victor Szebehely who saved Apollo 13 not Gary Sinese.
Discovery
2002.5.30 Disabilty Review: we did nothing wrong.
A 2002 University of Texas investigation examined disability discrimination claims, AIAA conference eligibility, and an aerospace engineering dismissal appeal.