A mechanical engineer by training, he joined Porsche in 1983, aged 31. After a stint at Wiesbaden based Glyco AG, a subsidiary of auto-parts maker Federal-Mogul, he returned to Porsche as head of production in 1991, taking over two years later as Chairman (CEO) when Porsche was close to bankruptcy. Due to Porsche's large shareholding in Volkswagen, Wiedeking also found himself on the supervisory board of that company. Some industry analysts believed that Porsche could not survive on its own, but Wiedeking, who says he made his first million by the age of 30 with real estate investments, took on the challenge.