- "Junior officers don't get to tell senior officers how to do their job."
- ―Ensign Eli Vanto
In the starfleet of the Galactic Empire, senior officers formed the second highest operational commissioned officer category of military ranks, ranking above junior officers and below flag officers. Those senior officers were captains, lieutenant commanders, and commanders.
- Thrawn (First mentioned)
- Thrawn: Alliances (Mentioned only)
- "The Sith of Datawork"—From a Certain Point of View (Mentioned only)
- Alphabet Squadron (Mentioned only)
- Star Wars: The Last Jedi: Expanded Edition (First appearance)
- Star Wars: The Last Jedi: A Junior Novel