Chief, Division of Thoracic Surgery, Program Director, Cardiothoracic Surgery
He is a past Director of the American Board of Thoracic Surgery, past President of the Thoracic Surgery Directors Association, past Treasurer, past President of the Society of Thoracic Surgeons and Councilor of the European Association of Cardiothoracic Surgery.  He has published over 350 articles/book chapters.
At MGH he has been Chief of Thoracic Surgery since 1994, Chief of Cardiac Surgery 2007-2011, and Program Director in Cardiothoracic Surgery since 1995.  He was a member of the Physicians Organization Executive Committee, Board of Directors and General Executive Committee.  He has been Director or Co-Director of the Postgraduate Course in Thoracic Surgery since 1985.  Dr. Mathisen received the Distinguished Service Award from the Society of Thoracic Surgeons in 2014.
Division of Thoracic Surgery
55 Fruit Street
Boston, MA 02114-2696