Gene Kranz was the Flight Director for the National Aeronautics and Space Administration during the Apollo 11 mission.
In the Timeless Universe
In the altered timeline, Kranz and the team still succeed in this mission, but are almost stopped by Garcia Flynn and Anthony Bruhl who let loose a modern computer virus on NASA's computers. The virus is stopped by the combined efforts of Rufus Carlin and Katherine Johnson.
In both timelines, Kranz wears a white vest for good luck.
Gene Kranz at Wikipedia