Sinbbis, a Herglic male, operated as a mercenary in the twilight period of the Galactic Republic.
Sinbbis belonged to a mercenary unit under the command of Dantin Vellos, a Zabrak. When the Ithorian Herdship Bazaar made its way to the Cularin system, this mercenary group was contracted to journey there and assassinate Osten Dal'Nay, who headed the Cularin Militia. Sinbbis went along with the team, and they set up an ambush for Dal'Nay on the planet of Cularin. Dal'Nay escaped into the Cularin jungle, prompting the mercenaries to give chase. Ultimately, they cornered him by a stream and engaged him in close combat. Nevertheless, the heroes of Cularin appeared, launching an assault that resulted in the defeat of Sinbbis and his fellow mercenaries.