Dr Alastair J. Riddell - Chief Executive Officer
Dr Riddell was appointed Chief Executive Officer of Stem Cell Sciences in November 2007. As a longstanding bioentrepreneur with more than 24 years experience in the industry, Dr Riddell spent considerable time at Board level building companies, raising money and negotiating corporate deals. From 2006 to 2007 he held the position of Non Executive Chairman at Surface Therapeutics prior to its sale to Serentis in September 2007. From 2005, he was Chief Executive Officer of Paradigm Therapeutics where he achieved a successful trade sale to Takeda Pharmaceutical Corporation in March 2007. Prior to Paradigm, Dr Riddell was Chief Executive Officer of Pharmagene for 7 years, during which time he successfully listed the company on the main market of the London Stock Exchange. He has also held senior positions with Celltech, Centocor and Amersham International in clinical development before moving to sales and marketing. Dr Riddell began his professional career as a medical doctor with six years experience in a variety of hospital specialties and in general practice. He is an active Board member of the BIA, a position he has held from 2000 to 2006 and recently re-elected to serve for the 2008 term. In November 2007 Dr Riddell joined the Board of Sareum Holdings plc as Non Executive Director.


