Douglas Ralston Sizenbach, 56, of Tomball, Texas, passed away July 19th, 2025.  Doug was born August 26th, 1968, in Spring Branch, Texas to the late Katy Ralston Sizenbach and the recently deceased Gary L. Sizenbach, DVM.  Doug was preceded in death by his grandparents Genevieve Reindl Sizenbach and Charles Red Sizenbach, and by USAF Colonel Wilson Ralston and Margaret Ralston.

Doug is survived by his loving children, daughter, Carmen Sizenbach, son, Vaun Sizenbach; step-mother, Mary Jay Sizenbach; brother, William Bill (Lorri) Sizenbach, and half-brother, Todd Cole; aunt, Laura Sizenbach; nephew, Hayden Sizenbach and his loving godfather Douglas Aycock, MD.

Private Graveside Services will be held at St. Peters United Church of Christ Cemetery in Spring Branch, where he will be interred beside his mother at 9022 Long Point Road, Houston, TX 77055.

Memorial contributions can be made to the organization of your choice.