John was born on November 12, 1969, in Miami, Florida, to Fay and Thomas Siebert. He attended school in Rural Valley, Pennsylvania. For 27 years, John worked as a dedicated repo agent. Outside of work, he was active in many pool leagues and enjoyed the friendships and camaraderie that came with them.
John is preceded in death by his parents, Fay and Thomas Siebert; his brother, Robert Bowers Sr.; his sister, Linda Wallace; and his grandson, Matthew Castellano.
He is survived by his children: Robin Boarts, John Siebert Jr., Ashley Siebert, Walter Castellano, and Michael Castellano. He is also survived by his brother and sister, Timothy Siebert and Lana Siebert, as well as his grandchildren: Mia Siebert, Emma Baker, Harper Saxton, Alexander Saxton, Willow Saxton, Jaxon Saxton, and Marissa Castellano.
A Celebration of Life Gathering will be held at 12:00 p.m. on Sunday, December 7, 2025, at Fred Hunter’s Funeral Home, 6301 Taft St, Hollywood, FL 33024.
The family of John Thomas Siebert Sr. wishes to extend their heartfelt gratitude to everyone who has reached out with condolences, love, and support during this difficult time.
