Kuuztin was the captain of the Imperial-class Star Destroyer Courageous during the Galactic Civil War. In late 3 ABY, Kuuztin was selected to join Grand Admiral Thrawn's task force during his campaign against the traitorous Grand Admiral Demetrius Zaarin. After leading a successful raid on a supply convoy bound for Zaarin's fleet, Kuuztin learned the location of one of Zaarin's supply depots and decided to attack it without Thrawn's authorization. Kuuztin hoped the ambitious attack would lead to a promotion, but his overconfidence led him into an ambush, and he was killed when his ship was destroyed.