Vehrenberg was a soldier stationed aboard the United Systems Military vessel USM Auriga.
Following Ripley 8's attack on Dr. Wren, security around the clone was stepped up. Vehrenberg stood guard behind Ripley 8 while Dr. Williamson conducted some simply memory recall tests with her to ascertain Ripley 8's intelligence. It is unknown what happened to him when the Cloned Xenomorphs escaped their containment cells. It is unknwon if he was either captured by the Xenomorph or was among the personnel who successfully escaped the Auriga aboard the first lifeboat.