Jack was a graduate of Sarasota High School then went on to earn his Bachelor's Degree from the University of Florida.
He married Diana Zales on March 17, 2001.
Jack had a career pursuing his love of motorsports. He owned Action Jet Ski West in Venice, Florida and Action Kawasaki Yamaha in Bradenton, Florida.
He was a member of the Rotary Club, the FTR - Florida Trail Riders, and CMA - Christian Motorcycle Association.
Jack had many varied interests, among them he had a life-long love of reading, watercraft, motorcycles and music and he loved playing his guitar.
Jack was preceded in death by his parents, Martin and Julia; and his brother, Jim O'Neill.
He is survived by his beloved wife, Diana O'Neill; and his son, Tristan O'Neill.
A Celebration of Life will be held at 11:00am on Saturday, January 3, 2026 at Covenant Life Presbyterian Church, 8490 McIntosh Rd, Sarasota, Florida where the family will receive friends from 10:00am until service time.
Jack loved the Lord.