Tierna was a member of the Kazon-Nistrim and one of Seska's aides. USS Voyager answered a distress call from his shuttle in late 2372. His parents were killed in a Trabe attack shortly after his birth. He told Chakotay that Seska was dead and that he escaped by bribing a guard. Chakotay did not trust him, as Tierna was one of the Kazon that beat him when Chakotay infiltrated Culluh's ship. Tierna was played by John Gegenhuber. His name was spelled "Teirna" in the Star Trek: Voyager Companion.