Walter Harriman (Gary Jones) is a trusted and loyal member of the Stargate Command (SGC) and the highest-ranking non-commissioned officer in the SGC. He joined the SGC after excelling in navigation and automatic flight control operations during the first Gulf War. General Hammond recruited him as someone with excellent technical ability and a cool head to operate the Stargate under extreme pressure. He is primarily a Stargate technician, running the dialing computer and other equipment from the Control Room. He also acts as an occasional administrative assistant to the head of Stargate Command, and has manned the flight console on the bridge of the Prometheus. He is known for anticipating exactly what his commanding officer wants.