Warden was the title given to someone who served as the individual in control of a prison. During the Clone Wars, Osi Sobeck was the warden of the infamous Separatist prison on Lola Sayu known as The Citadel.
- Star Wars: The Old Republic
- Star Wars: The Old Republic: Knights of the Fallen Empire
- Star Wars Episode I: Racer
- Jedi: Aayla Secura
- Star Wars: The Clone Wars – "The Citadel"
- Star Wars: The Clone Wars – "Counterattack"
- Star Wars: The Clone Wars – "Citadel Rescue"
- Death Troopers
- Death Troopers audiobook
- (First appearance)
- Star Wars Galaxies: An Empire Divided
- "Escape from Balis-Baurgh"—Star Wars Adventure Journal 1
- Jedi Search
- Fate of the Jedi: Conviction
- Fate of the Jedi: Conviction audiobook
- Death Star Technical Companion
- Planets of the Galaxy, Volume One
- Dark Force Rising Sourcebook
- The Star Wars Planets Collection
- The Thrawn Trilogy Sourcebook
- Star Wars: Episode I: Racer: The Official Nintendo Player's Guide
- Star Wars: Episode I Racer: Prima's Official Strategy Guide
- The Complete Star Wars Encyclopedia (Fenn Boda entry)