Dion D. O'Leary
October 2, 1938 – September 9, 2019
Dion D. O'Leary, 80, passed away September 9, 2019 peacefully at his son's home. He was the beloved and devoted husband of 55 years to the late Joan L. O'Leary. He and Joan were high school sweethearts and he adored her. He was a loving father to Darren (Margaret) O'Leary, the late Brian O'Leary, and Kathleen (Mark) Vierck. He was a cherished grandfather to Elizabeth, Kevin, and David O'Leary, and Megan and Kenneth Vierck. Dion was a graduate of Loyola Academy and the University of Notre Dame. Within the same week, he graduated from Notre Dame, married Joan, and entered Officer Candidate School for the United States Navy. He served as a Lieutenant both at sea aboard the USS Tidewater and on land working with Underwater Demolition Teams 21 & 22, Seal Team 2, and Beach Jumper Unit 2. He had a successful and unusual career in the Navy and he loved it. Following his proud service to his country, he had a successful career in sales for International Paper, Merrill Lynch, and in the book publishing industry, before starting his own venture. He was an avid reader, chess player, and enjoyed researching his family history. A dual - citizen of the United States and Ireland, he cherished his Irish heritage and his Catholic faith. Visitation will be held Friday September 13 from 10:30 AM until time of Mass of Christian Burial at St. Joan of Arc Catholic Church 820 Division St., Lisle. Military honors and burial to follow at Queen of Heaven Catholic Cemetery in Hillside, IL. Arrangements entrusted to Blake - Lamb Funeral Home, Lisle.