Patrick Daniel O'Brien, age 67, passed away at 1am on April 5, 2014 due to complications from Acute Pancreatitis. He is survived by his mom, Marie O'Brien, wife, Katie O'Brien, and two daughters, Kelly Callirgos and Shannon Chown. Pat worked in aerospace at JPL for over 25 years. He was also an active member of the Sunland/Tujunga American Legion Post 377, Sunland/Tujunga Elks Lodge, Sunland/Tujunga Neighborhood Council and an Air Force Veteran of the Vietnam War. In lieu of flowers, please consider making a donation to the Sunland/Tujunga American Legion Post 377, Sunland/Tujunga Elks Lodge, or your charity of choice.