The BBC's director of London 2012 Roger Mosey will takeover George Entwistle's role as acting director of BBC Vision.
In an email to staff the current director general Mark Thompson said that the search for a permanent head of BBC Vision will not begin until the autumn.
Entwistle does not start in his new job of director general of the BBC until 17 September but he will step down from his current role this month.
In a further email to staff in Vision from Entwistle, he says that Mosey will “bring a wealth of top-flight editorial judgement.”
Mosey has been BBC's director of London 2012 since 2009, looking after all the BBC aspects of the Olympics, including the Cultural Olympiad and news surrounding the Games. He was the former head of BBC Sport, controller of Radio 5 Live and editor of Today on Radio 4.
He will leave his current role before the Paralympics later this month. The BBC's head of major events Dave Gordon will take on Mosey's Olympic role. Channel 4 is showing the Paralympics, while BBC Radio 5 live will be providing commentary.