Oz

"People saw what they wanted to see in Oz. Some saw a man with a wrench who could fix the faulty cooling system. Others saw a man with a mop who cleaned up coffee spills. If anyone had bothered to look deeper, they might have gotten a glimpse of the true Oz. The one he kept hidden. The one that witnessed hundreds die in combat. A monster that screamed into his face in the mirror. All Oz wanted was a simpler life. To stay off the grid. He even chose a low rank Atlas job to do it. Surely that would be enough, right?"

- Oz' biography.

Oz is one of the four main playable characters in Exo Zombies first DLC Map Pack Havoc. He is portrayed by John Malkovich.

Biography
Oz works as a janitor in an Atlas research facility. On one night, while performing his usual clean up duty, Oz spots streaks of blood on the ground, along with several broken glass casings and some dead bodies. Afterwards, a zombie outbreak occurs in the facility, forcing him to evacuate. He arrives at the helicopter landing pad along with three other Atlas employees, Lilith, Decker, and Kahn. The rescue Warbird is attacked by zombies and crashes down, forcing Oz and the others to team up to survive against the onslaught of zombies. In an attempt to escape, all four survivors retrieve their employee keycards, and use them to call in a second Warbird for extraction. However, as the Warbird approaches the facility, it is shot down by an unknown rocket, leaving the four survivors stranded. Oz' fate, along with the others, is currently unknown.

Trivia

 * According to various in game quotes, Oz served in a war.
 * As proven by various in-game quotes, it is shown that he has a hatred for Atlas.