Mr. Ostrowski joined Greenhill as a Senior Advisor in 2012.  He is the former Chief Executive Officer of Bertelsmann AG, a role he held for 4 years.  In total he spent 26 years at Bertelsmann in various roles including CEO of Arvato between 2002 and 2008.  Earlier in his career he was also a Managing Director at a German subsidiary of Security Pacific, then the fourth largest U.S. Bank.