Having studied law at university, Kohlhaussen practiced law between 1960 and 1965, before joining Deutsche Bank. In 1974 he because Branch Manager of the German branch of LLoyds Bank International, he then became Branch line in Tokyo and New York for the Westdeutsche Landsebank in Dusseldorf.
In 1982, he became a Member of the Management Board of Commerzbank AG, before becoming CEO of the bank between May 1991 and May 2001. He was appointed President of the Federal Association of German Banks between March 1997 and March 2000. No longer CEO, he was appointed on to the Supervisory Board of Commerzbank AG May 2001 and was there until he resigned in May 2008.
Between 21 October 2002 and 5 June 2009, he was on the advisory board of The Holdingham Group Limited.
- Studied law in Frankfurt, Freigburg and Marburg.
- Martin Kohlhaussen profile Wirtschafts Woche, undated, accessed 25 September 2014