David is CEO at Fusion IP, formerly called Biofusion. He was appointed to the Board of Biofusion plc on 2 November 2004, having been a director of Biofusion Trading since 2 January 2003. David has previously worked at Celsis International plc ("Celsis") from its incorporation to its flotation on the full list of the London Stock Exchange in July 1993; Toad plc (now TG21 plc), which he co-founded, and was responsible for taking the company from start-up to a full listing on the London Stock Exchange; Whereonearth Limited; Codemasters Limited..