He joined ACE in November 2001 as its vice chairman. He became the CEO of ACE in 2004. In the 2008 financial crisis, he was among the CEOs refusing to take part in a tax-payer funded bailout.
ACE Limited, incorporated in Zurich, Switzerland, is the parent company of the ACE Group, a global provider of insurance products covering property and casualty, accident and health, reinsurance, and life insurance. ACE operates in 53 countries and territories and in the Lloyd's insurance market in London. Clients of the ACE Group consist of multinational corporations and local businesses, individuals, and insurers seeking reinsurance coverage.