Mercedes has announced a restructuring of its technical team ahead of 2019, which will see Aldo Costa step back from his role as Mercedes' engineering director.
Costa, who joined Mercedes from Ferrari in 2011, will become a technical advisor to the team, allowing chief designer John Owen to take over the engineering group previously headed up the 57-year-old Italian.
Meanwhile, performance director Mark Ellis has decided to retire from his position ahead of a sabbatical in mid-2019, seeing chief vehicle dynamicist Loic Serra take over his role. James Allison remains as technical director, with Owen and Ellis set to report to him.