Long-time Xfm drivetime DJ Ian Camfield is leaving to join K-Rock in New York.
He has been at the station since its launch a decade ago and has also presented its Music Response strand and The Xfm Rock Show.
Xfm said he would still contribute from the US while his replacement would be announced "in due course".
Camfield, who will be K-Rock's drivetime DJ, commented: "Leaving the weekday Xfm schedule was a hard decision to make as I believe Xfm is in the best position it has been in for ten years.
"On the other hand I am of course extremely excited about being able to realise my dream of broadcasting in the United States while still maintaining my links with Xfm in the UK."
Xfm programme director Adam Uytman added: "We all know that opportunities like this don't come along very often and we are pleased that we are in a position where we can support him with his future plans.
"Ian has played a big part in Xfm's history and we are looking forward to continuing our relationship with him - just from further afield."


