From the Japanese Grand Prix onwards, Mitchell will be Aston Martin’s new head of performance optimisation.
Andrew Vizard, the team’s current senior performance engineer, will be taking Mitchell’s place, having previously worked as a race engineer at Williams.
Stroll to have new race engineer from Japan
Vizard has had experience in the role before, having worked with Stroll during FP1 in Saudi Arabia, and speaking with the media in Australia, the Aston Martin driver believes he will have a smooth transition into his new role.
"I don't think it's so difficult, Andrew's been preparing for a while, been coming to races and spending time at the factory," he said.
"I think it should be pretty smooth. But very nice times with Ben for the last few years, it's been enjoyable."