Jurnak, a scientist of male Human descent, served the reconstituted Sith Empire during the period known as the Galactic War. In the year 3642 BBY, Jurnak found himself working at an Imperial research facility located on the planet Hoth. There, he and his fellow researchers analyzed recovered wreckage brought in by Imperial troops from a downed starship. A particularly interesting piece of salvage was the regenerative armor, capable of reviving individuals nearing death. The Empire subsequently provided this armor to the pirate named Valon for his raids against the Galactic Republic. Sometime after, the Rift Alliance apprehended Jurnak, who then chose to switch his allegiance to the Republic, offering information in return.