Mr. Campbell has served as Executive Vice President and Chief Financial Officer of the American Express Company, a global services company, since August 2013. From January 2004 to June 2013, he served as Executive Vice President and CFO of McKesson Corporation, a leading healthcare services, information technology and distribution company. Prior to his time at McKesson, Mr. Campbell spent 13 years at AMR Corp and its principal subsidiary American Airlines, ultimately becoming the company's CFO in 2002. He held a variety of financial and operations positions at American, including leading the company’s Europe, Middle East, and Africa operations while based in London. He began his professional career as a certified public accountant and management consultant with Deloitte, Haskins & Sells. Mr. Campbell has been a director of Aon plc since March 2018, and is a member of its audit and organization and compensation committees.