O’Brien of Billerica, September 20, 2015, Thomas F. O’Brien, age 76. Beloved husband of Theresa B. “Terry” (Williams) O’Brien to whom he was married 52 years. Devoted father of Maureen Hibbard of Billerica and Kathleen Cassidy and her husband, Brian, of Camden, Maine. Loving grandfather of Thomas Cassidy, Erin Roche, Meaghan Roche and Shannon Roche. Brother of the late Eleanor, William, Catherine, Mary and Arthur. Also survived by many nieces and nephews. Funeral from the Burns Funeral Home, 354 Boston Rd., (Rt. 3A), Billerica, Thursday, September 24, at 8:00 a.m. followed by a funeral mass in St. Theresa’s Church, Billerica at 9:00 a.m. Relatives and friends invited. Visiting hours, Wednesday, 4-7 p.m. In lieu of flowers, memorial contributions may be made in Thomas’s name to Oblate Infirmary & Retirement Home, 486 Chandler St., Tewksbury, MA, 01876. United States Marine Veteran. Member of the Woburn Gun Club. Interment at a later date. www.burnsfuneralhomes.com