Herrman was a member of United States Colonial Marine Corps. He was part of a 31 marine platoon under the command of Captain Paget, aboard the combat ship Hasdrubal that landed on the planet Tartarus who was ambushed and murdered by the Hive Wars Predator.
Later on during their patrol, Chimo is seen complaining about the bugs stinging him, with Garland teasing him. Garland suddenly points out that Chimo has seems to be getting bright spots from his stings. As Herrman takes a closer look, it is revealed that they are the three red dots of a Predator Plasmacaster, with Chimo's head suddenly being blown to pieces. Garland and Herrman begin firing aimlessly into the wilderness. After a brief pause, Herrman notices that Garland may have wounded the attacker, seeing it's blood sprayed against leaves. The hunter suddenly appears behind Garland and impales her with it's Wristblades before vanishing again. As Herrman searches for the hunter, he quickly turns around, shouting "get some-" before being briskly cut off as the Cracked Tusk Predator appears right behind him. Herrman is then killed as the Hive Wars Predator mimics Herrman's voice.