Francis "Frank" O'Brien, 90, passed away at home in Oak Forest, IL on January 3, 2023. Frank was born on October 22, 1932 in Evergreen Park, IL. He served in the U.S. Army, in Korea. He was married on February 12, 1955 to his best friend, Ann. He was an amazing caregiver to her after she became paralyzed in 2006. His love and devotion to her touched many hearts. Frank was preceded in death by his wife, Ann and his youngest son, John (Kim) O'Brien. He is survived by children Sherry (Jim) Strycker, Frank (Robin) O'Brien, Dan (Linda) O'Brien and Mary (Michael Hand) O'Brien; ten grandchildren: Sarah, Jamie, and Michelle Strycker; Danny, Jason, Bobby (Amy), Tracey, and Tommy O'Brien; Aimee (Scott) Zalewski; Emily (Nick) Bulthuis and seven great-grandchilden: Hailey, Joshua, Jack, Jacob, Mia and Alex and Evelyn. Frank and Ann were fortunate to enjoy over 25 years in retirement together. They loved traveling and spending winters in Gulf Shores, AL. Frank was a lifelong NASCAR fan. For many years, his family has heard his wishes for his funeral services: 1) do not touch his beard, 2) do not put a suit on him and 3) no flowers. Family and friends will gather for visitation on Wednesday, January 11, 2023 from 9:00 a.m. until time of Funeral Services 11:00 a.m. at Palos- Gaidas Funeral Home 11028 Southwest Hwy. Palos Hills, IL 60465 Interment Holy Sepulchre Cemetery.