Klaus-Gerhard Maximilian Zumwinkel (, born December 15, 1943) was Chief Executive Officer (CEO) and Chairman of Deutsche Post between 1990 and 2008. Being under suspicion of tax fraud, he resigned from office on February 15, 2008. He was convicted in January 2009, and given a suspended sentence of two years imprisonment and fined one million euros. Early life Zumwinkel was born in Rheinberg, Kreis Moers, Rheinprovinz, which is now in Kreis Wesel, Nordrhein-Westfalen. He attended Gymnasium Adolfinum in Moers and studied business at the University of Münster. Following graduation in 1969, he attended Wharton Business School of the University of Pennsylvania from 1970. He gained his M.Sc. in 1971, and returned to the University of Münster, where he qualified as Dr. rer. pol. in 1973. Career Zumwinkel began his career as a consultant with McKinsey in 1974, leaving to become CEO of Quelle in 1984 before subsequently joining the management board of Deutsche Post in 1990. From 2001 to 2004, Zumwinkel has been a member of the Board of Trustees of the Bertelsmann Stiftung. See also 2008 German tax affair References 1943 births German chief executives Living people Wharton School of the University of Pennsylvania alumni Commanders Crosses of the Order of Merit of the Federal Republic of Germany Members of the Order of Merit of North Rhine-Westphalia University of Münster alumni German people convicted of tax crimes McKinsey & Company people Recipients of the Federal Order of Merit who returned their decoration Lufthansa people