Republic Sienar Systems

Republic Sienar Systems was a starship manufacturer affiliated with the Galactic Republic. They manufactured the Scimitar, a heavily modified star courier customised in a secret laboratory. The craft was used by the minions of the Sith Lord Darth Sidious including the Sith Darth Maul.

Behind the scenes
Republic Sienar Systems was first mentioned in the Imperial Sourcebook, a Star Wars Legends supplement for Star Wars: The Roleplaying Game which was written by Greg Gorden and released in 1989. It was confirmed to be canon by the reference book Ultimate Star Wars, which was released in 2015.