Mark D. O'Brien
November 30, 1965 - June 22, 2020
HOLDEN / ARLINGTON - Mark D. O’Brien, 54, beloved husband of Kristen (Maher) O’Brien, passed away unexpectedly with his family by his side on Monday, June 22, 2020 at UMass Memorial Medical Center-University Campus. Raised in Arlington,... View Obituary & Service Information