Background
Quartermaster during the Clone Wars with a distinguished service as a defensive gunner on a Venator-class Star Destroyer downing hundreds if not thousands of opposing starfighters. When Order 66 came about he unfortunately had turned his guns on his Jedi friends totally against his will. After which he Retired from the Navy and removed his chip. When the Rebellion reared its head he saw it as a way to atone for his actions against the Jedi and has diverted his entire wealth to the service of the Alliance to Restore the Republic and took up a position as a gunner in a Y-Wing in Gold Squadron and as an added benefit is their Quartermaster though not their leader.
Motivation
Restore the Republic and the Jedi Order.