Pat Symonds has refused to deny that Paddy Lowe is on his way to Williams.
The Mercedes technical chief is rumoured to be replacing Symonds at Williams, with the former Renault man set to retire in the near future.
"Our team policy forbids us to talk about contracts," Symonds told Italy's La Gazzetta dello Sport.
"But it is clear that I will step back from the front line at some point in time. That doesn't mean it will happen at the end of the coming season.
"But it is important to me that I leave the team in good hands.
"All I can say about Paddy Lowe is this: the results that Mercedes has achieved speak for themselves," Symonds added.