Oliver Blume has been CEO of the sports car maker Porsche for two-and-one-half years. It has not gone unnoticed in Wolfsburg that the 1.9-meter-tall executive is doing a good job and has kept the company's rate of return at peak levels despite large investments. Blume, 49, has gained influence with Herbert Diess's replacement of VW Group CEO Matthias Müller. The Porsche CEO has been appointed to its board of management and is responsible for the Group's luxury brands. The avid athlete champions a team-oriented, transparent leadership style and is considered to be approachable. That makes him a counterpoint to the type of executive that has called the shots until now — and no less a potential candidate for the top job.