Airman Atienza was a male member of the United States Air Force who served at Icarus Base. In 2009, he was forced to evacuate the base with 80 other people after the base came under attack, and ended up stranded up on Destiny several billion light years away.
He installed one of refilled CO2 scrubbers back in place (SGU: "Air, Part 3"). A day after arriving on the ship, he was present in the observation deck with other crew members, who wanted to know what Eli Wallace knew, as Everett Young and Nicholas Rush trusted him. He later worked with Ronald Greer to arrange supplies for an Ancient shuttle to evacuate 17 people. (SGU: "Darkness", "Light") He was in Sgt. Spencer's quarters when they found Spencer dead. (SGU: "Justice")