Thomas Michael Cullnan, 74, of Oklahoma City (affectionately known as "TC"), passed away peacefully on May 17, 2025, surrounded by his family after a lengthy battle with COPD.

Tom was born on August 2, 1950, in Chicago, Illinois, and lived a life defined by hard work, humor, and deep devotion to his loved ones. He was preceded in death by his parents, John Michael and Mary Therese; his sister, Mary Beth; and his beloved son, Joe.

He is survived by his wife, Terry; his daughter, Tricia (Jeff) Mullin; his son, Bill (Becky); and his cherished grandchildren, Justin, Katelyn (Matthew), and Landon (Avery). Tom is also survived by four brothers, six sisters, and many extended family members and friends who will miss him dearly.

Tom built a strong and steady career over the decades, first working as a driver for Pepsi for 18 years before joining Waste Connections, where he spent 31 years as a driver and operations dispatcher. His dedication and reliability earned him the respect of coworkers and community members alike.

A proud and enthusiastic sports fan, Tom had a deep love for golfing and faithfully supported the Chicago sports teams, Oklahoma Sooners, and the OKC Thunder. He also took great pride in maintaining his yard and caring for his home.

Those who knew Tom will remember his sharp sense of humor, tireless work ethic, and above all, his deep love for his family. He had a playful spirit and was especially famous for his spot-on Donald Duck impression that brought smiles to both young and old. One of his favorite replies was the simple phrase, "ten four."

Viewing at Mercer-Adams is Thursday, May 22 from 9am-8pm with family present from 4-7pm. The Mass of Christian Burial will be celebrated Friday, May 23, at 10:00 a.m. at St. Charles Borromeo Catholic Church, 5024 N. Grove Avenue, Warr Acres, OK. Interment will follow at Chapel Hill Memorial Gardens, 8701 NW Expressway, Oklahoma City, OK.

In lieu of flowers, the family welcomes donations to Free to Live Animal Sanctuary at freetoliveok.org in Tom's memory.