Siechel Transystem was a company that sought out water-rich planets and sold the water to other planets that needed the resource. Siechel agents had a good reputation as fair merchants who treated clients on both ends with respect and integrity. Siechel was contracted by the Galactic Alliance to set up a water convoy from Dac to Tatooine.
- Star Wars: The Clone Wars – "Crisis at the Heart" (Mentioned on data display only) (As "Siechel Trans Sys" [sic])
- The Unknown Regions (First mentioned)