One of the original Tanith foundees, Raess served as a sniper within the Regiment. While not as skilled as Larkin or Merrt, he was still considered a crack shot with his long-las. He is known to have been posted to Rawne's Third Platoon, and also Caffran's Platoon within E Company following the Regiment's reorganisation. He fought at such notable battles as the defence of the Shrinehold, Hinzerhaus and Salvation's Reach. During this last mission he was part of a sweep and destroy team, commanded by Mktass, which included Brennan, Preed, and Sairus. Despite some early success in deactivating the many booby traps dotted around the Reach, one was accidentally triggered which resulted in the death of Raess and the entirety of his team.