Mercedes has confirmed the departure of head of aerodynamics Loic Bigois to join a currently unknown rival team.
News of Bigois' departure came during the Monaco weekend after a re-organisation of Mercedes' technical team.
Geoff Willis is now overseeing the Mercedes aerodynamics team while speculation has suggested that Bigois could be set for a move to Ferrari.
"Loic has been a really loyal and important member of the team for a number of years," team boss Ross Brawn was quoted by Reuters
. "We had an internal reorganisation...it didn't fit in with what he was hoping to do.
"So he asked to be released from his contract and we released him. I think he's going somewhere else at the end of the year."