Murnaghan will present Sky News Today, weekdays 9am to 1pm, from 1 January 2008 and will anchor the reporting of some set-piece events for Sky News.
Head of Sky News John Ryley, said: “Dermot is, without doubt, one of the best broadcasters in Britain.
“Sky News is all about delivering up to the minute, insightful news in an innovative way and Dermot is a first class interviewer who handles breaking news and anchors set piece events effortlessly and intelligently. “
Murnaghan, who worked on Channel 4 News and ITV News before joining the BBC, has been the host of BBC Breakfast for five years.
He has also presented regularly on the BBC Six O’clock News and BBC Ten O’ Clock News and continues to present quiz show Eggheads for BBC2. Before joining the BBC he anchored ITV’s Lunchtime, Evening and Nightly News bulletins.
In 1999 Murnaghan received the Royal Television Society’s interviewer of the year award for his interview with Peter Mandelson over the Geoffrey Robinson loan affair, an exchange that directly resulted in Mandelson’s resignation from the Cabinet.