Known for his work on the London stage he came to the screen in the HBO series Band of Brothers playing the role of Lieutenant Norman Dike.
He garnered a popular following on USA TV series Peacemakers as Detective Larimer Finch bringing the science of the future to the old west opposite Tom Berenger as Marshal Jared Stone.
[citation needed] O'Meara has appeared in the independent features Haven with Orlando Bloom, Resident Evil: Extinction, with Milla Jovovich and the acclaimed British First World War drama My Boy Jack with Daniel Radcliffe and Carey Mulligan O'Meara took minor roles in the indie comedy The Grand with Ray Romano and the film Leap Year opposite Amy Adams and John Lithgow.
[citation needed] He is friend to Justin Long in the New Line Cinema hit romantic comedy He's Just Not That Into You playing Bill opposite Ginnifer Goodwin.
[1] He has recurred in the American drama series, NCIS, as Marco Sali head of interpol starting Season 12 in the episode, "The Lost Boys".