Patrick Henry Pierce O'Sullivan (born April 1949) is an Irish businessman and public servant, who had executive roles at Zurich Financial Services and went on to hold non-executive positions at Old Mutual, Bank of Ireland and Saga plc.

[2] Early in his career, he worked for financial institutions including Bank of America, Goldman Sachs and Barclays.

He then spent 12 years at Zurich Financial Services Group, where his roles included CEO of Eagle Star, CEO of UK General Insurance, group chief financial officer, and (from 2007) vice-chair of the management board.

He was chair of the Shareholder Executive, which oversees the UK government's financial interests in a range of state-owned enterprises, from March 2012 to September 2014, working two days a month.

[2][4] He was chair of Old Mutual plc from January 2010[1][5] until he oversaw the break-up of the company in 2018, working four days a week.