David was Chief Operating Officer of ICAP Plc from 1994 until 2007. Prior to ICAP, David held a variety of senior trading positions, particularly in derivatives, working for Citibank, Chemical Bank and HSBC, where he was Chief Operating Officer of HSBC Global Markets. David currently serves as the chairman of Walker Crips Group plc, a full-service stockbroker and wealth manager, and holds a number of other non-executive directorships including IPGL Ltd, the majority shareholder of DDCAP Limited, Exotix LLP, SAXO Bank Capital Markets and Amedeo Air Four plc.