In 2014, Dr. Roger Diehl retired after 39 years at the Jet Propulsion Laboratory. During this time at JPL, he made contributions to many missions in the disciplines of mission design and systems engineering. His discovery of the VEEGA trajectory enabled the Galileo spacecraft to be launched to Jupiter after the Challenger accident had ruled out other options. Dr. Diehl also was the Cassini Mission Design Manager, the Shuttle Radar Topography Mission Payload Operations Manager, and Project Systems Engineer for two projects.