Mercedes has confirmed that James Allison will join the team as its new technical director at the start of March.
Allison has spent over two decades working in senior roles in Formula 1, most prominently with Renault and Ferrari, but left the Italian squad last summer.
Allison will take on the newly-created role of technical director on March 1, reporting directly to Toto Wolff, who 'will have overall responsibility for running the team.'
"I am very excited to be getting back to work after this time away from the sport," he said.
"It’s a massive privilege to be given the trust of a position in a team that has done so spectacularly well in the past three seasons.
"I am really looking forward to playing my part in helping Mercedes go from strength to strength in the coming years."
Wolff labelled Allison the "perfect guy" for Mercedes, the Briton having joined in the wake of Paddy Lowe's departure.
"I am delighted to welcome James to Mercedes and very much looking forward to working with him," said Wolff.
"Our technical team is extremely skilled at every level and at the top of its game after delivering three world championships in a row.
"It wasn't an easy task to find the right personality who can strengthen our experienced group of engineers, give our talented young team members the space to develop and also bring his own vision to this role.
"James is a sharp engineer; I think we have found the perfect guy and the right fit with our senior leaders."