Randal J. Kirk (born March 1, 1954 in Pleasanton, California) is the Chairman and Chief Executive Officer of Intrexon, a privately held synthetic biology technology company. Kirk is cited to be one of the most successful biotech company developers in the United States, having founded General Injectables and Vaccines (GIV) and New River Pharmaceuticals, and through his service on the Boards of Directors of many biotech companies, including Clinical Data, Inc, Halozyme Therapeutics, Inc., and Scios, Inc., among others.