Kyburz is a NPC from BioShock.
He's an Australian electrical engineer who left Turtle Bay in 1947 for Rapture. While he initially looked up to Andrew Ryan, it was during the civil war that he decided to try and kill him. He started to build a device to disable the power to Ryan's central HQ, but he eventually became paranoid and didn't finish it. It is not known how he died, although he might have been killed by Ryan's security forces.