He is also the named inventor on all of SIWA Therapeutics’ portfolio of more than 60 global patents.Prior to founding SIWA, Gruber served as interim CEO of ZelleRX, an early stage biotechnology company with a natural killer cell therapy that destroys cancer cells. From 2000 to 2006, Gruber was CEO and Co-Founder of Arryx, Inc., a Chicago biotechnology company that brought to market a breakthrough research tool that uses lasers to allow researchers to simultaneously manipulate hundreds of microscopic objects in three dimensions.