Dr. Dainiak is a graduate of Wesleyan University and the University of Connecticut Medical School.  He performed his Internal Medicine residency at Yale University and Fellowship in Gastroenterology at the Norwalk/Yale program.  He has been a clinical gastroenterologist in Southern New Hampshire since 2006.  He has served as Medical Director of Endoscopy and Section Chief of Gastroenterology at Elliot Hospital and on the Medical Executive Committee at Catholic Medical Center.  He specializes in diseases of esophageal motility and performs high-resolution manometry.  He is Board Certified in Gastroenterology and a member of A.G.A. and A.S.G.E.

Dr. Dainiak and his wife Heather are parents to Nicholas and William and the co-founders of the Our Promise to Nicholas Foundation and the Batten Research Alliance (BRA), working at bringing awareness of Batten Disease and facilitating scientific cooperation among family foundations.

Dr. Dainiak is a Master’s level swimmer.  He enjoys train travel, exploring the National Parks, and all Boston sports.