Dr. John Bush Simpson, Ph.D., M.D., founded Avinger, Inc. in March 2007 and served as its Chief Executive Officer from march 2007 to December 2014. Dr. Simpson has been a Partner at Cardiovascular Medicine and Coronary Interventions, a cardiology physician group Since 1983. Dr. Simpson served as Scientific Advisor of Cryovascular Systems, Inc. He served as Managing Director of De Novo Ventures funds in fund complex. He was the Founder of Sawtooth Labs, Inc. He served as Clinical Director at De Novo Ventures. He served as the Chief Scientist of ev3, Inc. until February 7, 2008. He founded Foxhollow Technologies, Inc. and served as its Chief Executive Officer since June 5, 2006. He served as an Interim Chief Executive Officer of Foxhollow Technologies, Inc. from January 1, 2006 to June 5, 2006. From October 1996 to July 1997, he served as the President of Foxhollow Technologies Inc. He served as an Executive Chairman of Avinger, Inc. since December 2014 until December 11, 2017. He co founded LuMend, Inc. in 1996 and served as its Chairman of the Board. He is a co-owner of GIGL Investments L.P. He served as Chairman of the Board of Foxhollow Technologies, Inc. until January 1, 2006. In 1984, he founded Devices for Vascular Intervention, Inc. He founded several other interventional cardiology companies, included Vascular Intervention and Advanced Cardiovascular Systems. He founded and served as the Chairman of Perclose Inc. since inception in March 1992. He served as Vice Chairman at ev3, Inc. until February 7, 2008. He served as the Chairman of Avinger, Inc. since March 2007 until December 11, 2017. He served as Executive Director of Foxhollow Technologies Inc. since September 1996. He served as a Director of ev3, Inc. until February 7, 2008. He served as a Director of Perclose Inc. since inception in March 1992. He served as a Director of LuMend, Inc. He is a professor of clinical medicine at Stanford University. He served as a Staff Cardiologist at Sequoia Hospital in Redwood City, California since 1981. He has published extensively on a wide variety of topics pertaining to interventional cardiology and has lectured on various subjects throughout the world. He has been honored with the Andreas Greuntzig Award from the European Cardiology Society, received the Duke University Alumni Award and the Lifetime Achievement Award from the Trans Catheter Therapeutics Conference. He holds M.D. from the Duke University School of Medicine and completed a fellowship in interventional cardiology at Stanford University. He holds Ph.D. and M.S. in Biomedical Science from the University of Texas at Houston and an undergraduate degree B.S. in Agriculture from Ohio State University.