Budkowski, who left his role at the FIA last week, will oversee all activities related to the development and production of the Renault F1 team’s chassis.
The move, confirmed at the Japanese Grand Prix, is deeply controversial because Budkowski knows many of the secrets of the top teams.
Last race weekend at Malaysia the F1 team bosses had a meeting in the paddock on the issue, with Red Bull’s Christian Horner later saying it would take “major issue” with Budkowski being allowed to join a rival on such a timeframe.
Renault’s rivals feel their secrets could now be taken to the Enstone team.
“We take major issue with that if he does end up with another team,” Red Bull’s Christian Horner told reporters at last week’s Malaysian Grand Prix.
“In the role that Marcin has been responsible for, he has been in an extremely privileged position and extremely recently he has been in people’s wind tunnels and looking at intimate details of knowledge of next year’s cars.”
Renault boss Cyril Abiteboul said: “There have been a lot of positive changes these last few months at Renault Sport Racing with an accelerated expansion at Enstone, the restructuring of our engine deployment from Viry with the supply of two top customer teams for 2018, three titles in a row in an increasingly competitive Formula E championship and other motor racing categories, and the arrival of new strategic partners.
“All of this is happening in a context where the seasons are longer and more intense. It was clear that the Renault Sport Racing management structure needed reinforcing. “Marcin’s mission will be to continue the strengthening of Enstone to enable Renault to join the top Formula One teams by 2020, through relying on the proven personnel of the likes of Bob Bell, Nick Chester and Rob White.
“Marcin’s arrival is excellent news and further proof of our determination to achieve our goals.”