The 43-year-old from Barcelona, who has worked with Jaguar, HRT and Williams in Formula 1, left Toro Rosso in May, following Verstappen's promotion to Red Bull Racing.

Sauber has announced the Spaniard has signed with the team and that he has already started work at the Hinwil factory.

Pujolar's first race appearance with Sauber will be at the Singapore Grand Prix.

Paul Russell will be back in his previous position as head of performance integration after having worked as chief race engineer on an interim basis.