Siemens CEO Joe Kaeser

Siemens CEO Joe Kaeser

Guenter Schiffmann/Bloomberg

Joe Kaeser, chief executive officer of Siemens AG, has spent his entire career at Siemens, including seven years as chief financial officer. He wins plaudits from investors for his communication skills and efforts to sell underperforming businesses as well as his experience managing several of the company’s units.