Nattis, a male Human, served the Galactic War-era resurgent Sith Empire as a specialist. He was a member of the Imperial strike force sent to Belsavis's The Tomb, where Nattis and his commanding officer, Master Sergeant Hayg, confronted a band of Esh-kha wielding sophisticated blasters. Given Hayg's focus on the Republic forces, Nattis was assigned the task of enlisting another Imperial to secure the hazardous technology from the Esh-kha.