Mark B. Knudson, Ph.D., has served as our President, Chief Executive Officer and Chairman of the board since December 2002. Dr. Knudson also served as President and Chief Executive Officer of Venturi Group, LLC and Venturi Development, Inc., positions he held from 1999 and 2001 until their dissolutions in 2008 and 2009, respectively. Dr. Knudson served as Chairman of the board of Restore Medical, Inc., a publicly-held medical device company focused on the treatment of sleep disordered breathing, from 1999 through July 2008 when it was acquired by Medtronic, Inc. Dr. Knudson was also a member of the audit committee of Restore Medical. Dr. Knudson received a Bachelor of Science in biology from Pacific Lutheran University and a Ph.D. in physiology from Washington State University.

Gregory S. Lea has served as our Chief Operating Officer since February 20, 2013 and Senior Vice President and Chief Financial Officer since May 21, 2007. Prior to joining us, Mr. Lea served as Chief Financial Officer of Pemstar Inc. from July 2002 through January 2007 when it was acquired by Benchmark Electronics, Inc. Mr. Lea also served as a director of Pemstar from April 2001 through January 2007 and held the position of Corporate Controller from April 2002 through July 2002. From 1993 to April 2002, Mr. Lea served as a corporate Vice President for Jostens Corporation, a commemorative and affiliation products manufacturer, serving most recently as corporate Vice President-Business Ventures. Prior to that, Mr. Lea held several financial management and administrative positions at IBM Corporation from 1974 to 1993 and was President and a director of the Ability Building Center, Inc. from 1981 to 1993. Mr. Lea holds a B.S. in Accounting/Business Management from Minnesota State University, Mankato.

Daniel L. Cohen has been with EnteroMedics since 2009, serving as Senior Vice President of Government Relations and Health Policy. Prior to joining the Company, Mr. Cohen was Senior Vice President, Government Relations and Public Policy for US Oncology. He also served as a consultant with Inamed Corporation, a division of the Allergan Corporation, from 2001 to 2003, when he joined the company as Vice President, Global, Corporate and Government Affairs, and again after the Allergan acquisition in 2006 through 2008. Mr. Cohen has experience as a Principal in a full-service government affairs firm and has served on the American Israel Public Affairs Committee (AIPAC). He has held staff positions with Members of the U.S. House of Representatives and managed political campaigns of all levels. Mr. Cohen holds an M.A. in Liberal Studies/International Affairs from Georgetown University and a B.S. degree from Willamette University.

Adrianus (Jos) Donders, has served as our Senior Vice President of Research and Advanced Development since April 2005. From September 2003 to April 2005, Mr. Donders was Director Communication Systems Engineering for Medtronic USA. From June 2000 to August 2003, Mr. Donders served as Director Clinical Study Management and Research and Development Europe for Medtronic Europe. Mr. Donders received a degree equivalent to a Masters of Electrical Engineering from the Institute of Technology Eindhoven Netherlands.

Scott Shikora, M.D., FACS is the Director of Bariatric Surgery at Brigham and Women's Hospital in Boston and Editor of Obesity Surgery. He was previously a Professor of Surgery at Tufts University School of Medicine and the Chief of Bariatric, Minimally Invasive, and General Surgery at Tufts Medical Center in Boston. . He attended medical school at Columbia University College of Physicians & Surgeons. He completed his surgical residency and Nutrition Support fellowship at New England Deaconess Hospital in Boston and spent four years as a staff surgeon in the United States Air Force. He is a member of several medical societies and active in leadership in the American Society for Parenteral and Enteral Nutrition where he is a Past President and the American Society for Metabolic and Bariatric Surgery where he was both a Past President and an Executive Counsel member. Dr. Shikora is an Associate Editor of two surgical journals (Obesity Surgery and Surgery for Obesity and Related Diseases) and a reviewer for several others. He has co-edited two nutritional textbooks and a CD ROM/DVD interactive program on the treatment of obesity, The Multidisciplinary Approach to Bariatric Surgery and Morbid Obesity. Dr Shikora has also authored numerous book chapters and journal publications and has made hundreds of presentations internationally on bariatric surgery and nutrition support topics. Recently, he was awarded the Distinguished Alumni award at Muhlenberg College.

Katherine S. Tweden, Ph.D., has served as our Vice President of Clinical and Regulatory since May 2011. Previously she served as our Vice President of Research since January 2003 and Vice President of Research and Clinical since September 2008. From November 2002 to January 2003, Dr. Tweden was a consultant to Venturi Group, a medical device incubator company. From January 2003 through August 2004, Dr. Tweden worked for Venturi Development Inc. as a consultant to us. From July 1997 to October 2002, Dr. Tweden held positions including Director of Research and Vice President of Research for HeartStent Corporation. From September 1990 to June 1997, Dr. Tweden held the positions of Senior Research Scientist and Principal Research Scientist at St Jude Medical, Inc. Dr. Tweden received a Bachelor of Arts in chemistry from Gustavus Adolphus College and a Masters degree and Ph.D. in biomedical engineering from Iowa State University.