John T. O’Brien, age 80, entered into eternal life suddenly on January 4, 2023. John was born and raised in Roslindale and has lived in Braintree for 51 years. John was a Vietnam Era Army Veteran. He graduated from Boston English High School and Northeastern University with a degree in Engineering. Mr. O’Brien was a Client Executive in the print industry and label making business for 4 decades. John was an avid golfer and New England sports enthusiast. He enjoyed spending summers boating, sitting around the campfire and connecting with family and friends in Rangeley, Maine. Beloved husband of Mary F. (Mitchell) O’Brien. Devoted father of Thomas and his wife Tracy of Denver, CO and John “Jack” T O’Brien Jr. and his wife Danielle of Hebron, ME. Loving Pup of Mitch, Jackson and Tessa. Beloved brother of Robert M O’Brien of Tampa, FL. Beloved uncle to 13 Nieces and nephews. He is survived by his brother in laws Ed Mitchell of Newton, John Mitchell of Wellesley, and the late Fred Mitchell. John was a friend of Bill W. Funeral from the Clancy-Lucid Funeral Home, 100 Washington Street, Weymouth on Tuesday, January 10 at 9:30 am. Funeral Mass at The Immaculate Conception Church East Weymouth at 10:30 am. Relatives and friends are respectfully invited. Visiting hours on Monday, January 9, from 6 until 9 pm. Private burial at a later date.