Irish comedy writer and director known for his work on the sitcoms Father Ted, Black Books, and The IT Crowd. In 1996 he won a BAFTA Award for Best Comedy, and in 2009 he won an IFTA Award for Best Script for Television.
He wrote for the magazine Hot Press in Dublin where he met his longtime collaborator Arthur Mathews.
He directed several episodes of the shows he worked on, including Black Book and Father Ted, and he directed every episode of The IT Crowd.
He married Helen Serafinowicz, whose brother Peter is a popular English actor.
His film directing debut, a horror short called Hello, Friend, featured Julia Davis in a leading role.