Deacon John Victor Sebastian

Deacon John Victor Sebastian, a devoted family man, faithful servant of God, and cherished member of his community, passed away peacefully at the age of 83 on May 31, 2025.
Son of the late Drs. John and Stephanie Sebastian. Preceded in death by his brother Fred. Survived by his wife of 57 years, Kathleen Marks Sebastian; daughter, Nicole Peeney (John); son, John II (Ann); daughter, Michelle (Shawn); son, Mark (Lauren); grandchildren, Allison, Christian, and Justin Peeney, Kathleen, Mary, and John Sebastian III, Isabella, Emilia, and Maria Gleason, Mark II and Valentino Sebastian; brother, Paul (Jaga); brother-in-law James (Patricia); sister-in-law, Georgianna; many nieces and nephews and countless friends.
Before dedicating his life fully to the church and charitable causes, John served his country as a Captain in the U.S. Army. He served as a liaison in Paris and briefly in Vietnam, and then as a member of the Army Reserves after returning to the United States. He then continued to have a successful career as an investment banker in Chicago for 30 years. John proudly co-hosted a weekly finance show, "Ask an Expert" on Channel 26 in Chicago. He graduated from Duquesne High School in 1959 near Pittsburgh, was proud to have earned his Bachelor's degree from Penn State University in 1963, making him a lifelong fan of the Nittany Lions, and later earned his MBA from the University of Chicago.
In 1963 after graduating from Penn State he worked for Inland Steel in East Chicago, Indiana. While there, he met the love of his life Kathleen at her father's ophthalmologist office where she worked. They were married in 1967 and moved to Illinois in 1973 where he and Kathleen raised their four children. He was ordained as a permanent Deacon in 2003.
For over 20 years, John served with unwavering commitment as Deacon at St. Isaac Jogues Church in Hinsdale, IL where he was a parishioner for over 50 years. He was also blessed to serve as a deacon at St John the Evangelist in Naples, Florida. In both communities, he was a beloved and integral part of the church, offering guidance, support, and comfort to many individuals. He also made countless gifts of his time, talent and treasure throughout his lifetime and was proud to be a Knight of the Holy Sepulchre.
Deacon John Sebastian's legacy of love, faith, and generosity will forever be etched in the hearts of his family and all who had the privilege of knowing him.
Visitation Thursday, June 5th, 3:00 PM to 8:00 PM at Sullivan Funeral Home, 60 South Grant Street, Hinsdale, IL. Funeral Friday, June 6th, family and friends to meet for a 10:00 AM Funeral Mass at St. Isaac Jogues, 306 West Fourth Street, Hinsdale, IL. Interment Queen of Heaven Cemetery.
Mass will be live-streamed Here.
Deacon John's Register Book can be signed Electronically Here
In lieu of flowers, the family requests that memorial contributions be made to Catholic Charities Diocese of Joliet.
For Information 630-323-0275 or www.sullivanfuneralhomehinsdale.com