Greg Tiernan was the director of Thomas and Friends from 2009 to 2012. In the twelfth season, he worked as unit director for Nitrogen Studios. He began work directing the series after the CGI transition, taking over from Steve Asquith. He was replaced by David Baas when production was moved to Arc Productions in 2012. He is married to Nicole Stinn. He has been working in the animation industry for twenty-seven years. Tiernan is a fan of the Railway Series. So much in fact, that he owns a copy of both The Island of Sodor: Its People, History and Railways and Sodor: Reading Between the Lines. According to an interview with SiF, Greg Tiernan says he would like to remake Pop Goes the Diesel and Dirty Work. And, if it was his choice, he would reintroduce every character ever introduced. Tiernan was involved in the animation of "Happily N'Ever After", the last film George Carlin played a part in. Greg Tiernan(1965년생, Dublin, Ireland) 는 감독으로, 대표작으로 토마스와 친구들, 소시지 파티, 아담스 패밀리가 있으며, 그 외에도 아담스 패밀리 2, Thomas & Friends: Up, Up and Away!, 토마스와 친구들: 선로 위의 영웅, 토마스와 친구들: 블루마운틴 미스터리, Thomas & Friends: Thomas and the Runaway Kite, 토마스와 친구들: 안개섬 구출작전, Thomas & Friends: Wild Water Rescue & Other Engine Adventures, Thomas & Friends: Animals Aboard!, Thomas & Friends: Spills and Thrills, 토마스와 친구들: 디젤 기관차들의 반란, Thomas & seine Freunde: Der Held der Schienen, Thomas & Friends: The Best of Thomas 등 다양한 작품을 연출했다. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2021년 아담스 패밀리 2 연출을 맡았다. 2019년 아담스 패밀리 연출을 맡았다. 2019년 아담스 패밀리 제작에 참여했다.