O'BRIEN, Richard B. Firefighter Brookline Fire Dept. (ret.). Of Brookline on March 23, 2021. Devoted husband of Barbara A. (Gorman) O'Brien. Loving father of Roberta Bova and husband Steve of Billerica, Michael O'Brien of Stoughton, Maureen McCoy and husband Steve of Stoughton, David O'Brien of Moultonborough, NH., and the late Judi Thorne of Millis, Richard G. O'Brien of Marshfield and Paul O'Brien of Billerica. Also survived by his eight cherished grandchildren and nine adored great grandchildren. A Funeral Mass will be celebrated on Monday March 29th in St. Mary of the Assumption Church, Brookline at 11:00. Relatives and friends are kindly invited. Visiting hours private. Interment St. Joseph Cemetery. Late Navy Veteran Korean War. In lieu of flowers donations may be made to Brookline Firefighters Local 950, P.O. Box 771, Brookline Village, MA. 02447. (COVID-19 guidelines will be followed in the church with use of facial coverings and social distancing.) The funeral Mass can be viewed by visiting https://www.stmarybrookline.com/virtual-mass-and-services and following the directions.