The following biography taken from www.startrek.com:
Colm Meaney reprises his role from Star Trek: The Next Generation as Miles O'Brien, now Chief Operations Officer on Star Trek: Deep Space Nine. "This position serves as a promotion for Miles, and despite the precarious condition of the space station, he is excited and challenged. Although his work may be overwhelming at times, Miles is happy to be there," says Meaney.
Born and raised in Dublin, Ireland, Meaney began studying acting at the age of 14. After high school, Meaney entered the Abby Theater School of Acting, part of the Irish National Theater, and later joined the company as a professional actor. He spent eight years in England, touring with several theater companies. It was then that Meaney made his first television appearances in the BBC production of "Z Cars" and the independent British production of "Strangers," before moving to New York.
Meaney recently appeared in the summer blockbuster "Con Air" with Nicholas Cage and John Cusack. Additionally, he starred in the feature film "The Van" which premiered at the Cannes Film Festival '96 and was released this summer. During the breaks from the fifth season of Deep Space Nine, Meaney starred in a number of independent feature films including "OWD BOB" with James Cromwell, Ted Demme's "Noose" with Denis Leary, "This is My Father" with Aidan Quinn and James Caan and an untitled Lodge Kerrigan film which co-stars Katrin Cartridge and Vincent D'Onofrio.
As his feature film career continues to flourish, Meaney manages to maintain a successful balance with his hectic Star Trek: Deep Space Nine production schedule. He appeared with Anthony Hopkins as Badger in the Columbia Pictures release, "The Road To Wellville" and as Morgan the Goat in the Miramax feature film "The Englishman That Went Up A Hill And Came Down A Mountain" starring Hugh Grant. He had also starred in such feature films as "The Dead," "The Commitments," "Dick Tracy," "Die Hard II," "Under Siege" with Steven Segal, and "Far and Away" with Tom Cruise. Meaney's critically acclaimed performance in the 1994 Miramax Film "The Snapper," earned him Golden Globe nomination for "Best Actor."
Prior to his role as Miles O'Brien on Star Trek: The Next Generation, Colm guest-starred in such shows as Remington Steele, Moonlighting, and Tales From The Dark Side. He has appeared in such feature films as "The Dead," "Dick Tracy," "Die Hard II," and with Tom Cruise in "Far and Away." Colm also appeared in the influential role of the father, Jimmy Rabbite, Sr. in "The Commitments." In addition, he has appeared in the box office hit feature films "The Last of the Mohicans," and with Steven Seagal in "Under Siege."