Former Porsche LMP1 boss Andreas Seidl will become McLaren's managing director in Formula 1 on May 1st of this year.
Seidl's move to McLaren was revealed last year but the Woking-based outfit had not disclosed when the German engineer would be brought on board.
"We're delighted that Andreas is able to join the team on 1 May," said McLaren CEO Zak Brown.
"This enables us to continue the momentum of our recovery plan and we’re looking forward to welcoming him to McLaren."
McLaren new recruit is seen as a valuable addition to a management and technical team that was revamped after the departure back in June of racing director Eric Boullier.
Seidl is no stranger to Formula 1, having previously worked at BMW Motorsport from 2000 and 2006, then at BMW Sauber as head of track operations until 2009.
His claim to fame however was orchestrating Porsche's LMP1 success in the World Endurance Championship.
In the coming months, Seidl will be joined at McLaren by another high-profile recruit: former Toro Rosso technical director James Key.