Admiral Derodd Okins
Shortly before the Battle of Yavin, Okins gained the rank of Admiral, and was given command of the Imperial-Class Star Destroyer Revenge. He was known as a brilliant officer and tactician, but was somewhat of a troublemaker. His record was impeccable up to this point in his career, which brought him to the attention of the Sith Lord, Darth Vader.
Around a year and a half after the Battle of Yavin, Admiral Ozzel, now commander of the Imperial Navys flagship, the Super Star Destroyer Executor, had to relinquish command temporarily while he was sent off on a secret assignment. Lord Vader gave the reigns of command over to Okins, who was thrilled.
Then shortly after, two of Vaders Sith apprentices, Ruan and Calis, made an attempt to escape the clutches of both Vader and the Empire. The Executor was assigned to recapture the two as they fled Coruscant in a small assault transport.
