Sienar-Jaemus Army Systems was a manufacturer that provided technologies and vehicles to the First Order and the Sith Eternal. The company was the successor of Sienar Fleet Systems, who created SJAS to avoid arms restrictions against selling weaponry to the First Order. The presence of Sith loyalists within the executive board of Sienar-Jaemus allowed the clandestine funneling of supplies and designs to Exegol through various intermediaries.
- Star Wars: The Force Awakens: Incredible Cross-Sections (First mentioned)
- Poe Dameron: Flight Log
- Star Wars Encyclopedia of Starfighters and Other Vehicles
- Star Wars: The Rise of Skywalker: The Visual Dictionary