Dr. Mack served as Medical Advisor at NeoChord, Inc. Dr. Mack has been a practicing cardiothoracic surgeon for twenty-four years. Dr. Mack serves as a Director of Cardiovascular Research and Cardiovascular Medicine of the Heart Hospital Baylor Plano. He serves as a Director of Cardiovascular Surgery for the Baylor Healthcare System. Dr. Mack serves as the Chairman of the Board for the Cardiopulmonary Research Science & Technology Institute, as well as Medical Director of Cardiovascular Services and Director of Transplantation for Medical City Dallas Hospital. He has been actively involved in research and development of minimally invasive surgical techniques for the heart and spine since 1992. Dr. Mack serves as a Member of Scientific Advisory Board of CardiAQ Valve Technologies, Inc. He served as a Member of Medical Advisory Board at ValveXchange, Inc. He served as a Scientific Advisor of Cardica Inc. He co-founded the Cardiopulmonary Research Science and Technology Institute (CRSTI) in 1996. He has held office on numerous committees of the AATS and STS including chair of the STS Committee on New Technology Assessment.