* 6. 11. 1957, Brémy (Bremen), Německo (Germany)
was chief executive officer (CEO) of Siemens AG from 2005 until July 2007, On April 25, 2007,
In August 2007, Kleinfeld was appointed COO of Alcoa Inc. Beginning October 1st, 2007, he will oversee the operative business for the US Aluminum concern. In May 2008, Kleinfeld was appointed as CEO of Alcoa, thus succeeding Alain Belda.
He started his career in 1982 by joining a specialized marketing consulting firm and worked with clients like Siemens, Henkel, Citibank, EFFEN, and industry associations.