JJ Lehto
In 1991, Postlethwaite was signed as technical director of the Sauber team who planned to enter Formula One in . Taking Gascoyne with him, Postlethwaite relocated to Switzerland and designed the team's first car. Despite leaving Sauber before the start of 1993, the designer's car went on to considerable success in the hands of JJ Lehto and Karl Wendlinger regularly scoring points.