Stephen O'Connor founded Quantile Technologies Ltd. Currently, he is Chairman at this company and Chairman at HSBC Bank Plc.

He is also on the board of HSBC Continental Europe, London Stock Exchange Plc and FICC Markets Standards Board Ltd.

In the past Mr. O'Connor occupied the position of Chairman at International Swaps & Derivatives Association, Inc., Member of High Level Stakeholder Group, Global Head-OTC Client Clearing at Morgan Stanley & Co. International Plc and Member-Global Markets Advisory Committee at Commodity Futures Trading Commission.