John J. O'Sullivan of Westchester, age 80. Beloved husband for 55 years of Kathy, nee Kutz; loving father of Tracy (Robert) Fleischer and Becky O'Sullivan; proud grandfather of Shawn, Ryan and Samantha; dear brother of Eugene (late Arlene) and the late Patsy (John) Culhane; fond uncle of John, Cathy, Peggy, Paul, Ann and the late Debbie and Patty. John was a graduate of Loyola University. He was the former President of the West Suburban Realtors Association and former Manager of Gladstone Coldwell Banker. John enjoyed golf, cards, fishing and mostly spending time with the kids at the lake house. Family and friends will be received at the Conboy-Westchester Funeral Home, 10501 W. Cermak Rd., Westchester on Thursday, May 11, 2023 from 3:00 p.m. to 8:00 p.m. Funeral Friday 9:30 a.m. from the funeral home to Divine Infant Church for 10:00 a.m. Mass. Interment Queen of Heaven Cemetery. For funeral info 708-F-U-N-E-R-A-L.