Curtis L. Sieber, 61, of Mifflintown, passed away peacefully on Thursday, October 16, 2025, at Geisinger Medical Center in Danville. Born on October 20, 1963, in Lewistown, he was the son of the late Wayne Sieber Sr. and Helen (Kilmer) Sieber.

In addition to his parents, Curt was preceded in death by his brother, Wayne Sieber Jr.

Curt was a devoted father to Justin Sieber and to Nicole Luongo and her husband, Tim. He was a proud and loving grandfather to McKenna, Hudson, and Rockland, and cherished his role as great-grandfather to little Remington. He is also survived by his children’s mother, Denise Miller, and his brother, Kenneth Sieber.

A graduate of East Juniata High School, Curt built a career as a professional plumber, a trade through which he shared his craftsmanship and dedication with many. Known for his endless stories, Curt had a gift for making people smile. Beneath his playful spirit was a generous heart; he was the kind of person who would drop everything to help a friend in need. Over the years, he formed deep and lasting friendships, and in his time of need, those same friends stood by him, a kindness his family will always remember with gratitude.

Curt had a lifelong passion for aviation. He found joy in building model airplanes, flying small aircraft, and attending air shows whenever he could. He also loved the outdoors. Whether kayaking through peaceful waters or spending time on the family farm, he felt most at home surrounded by nature.

A Celebration of Life service will be held on Saturday, October 25, 2025, at 10:30 am at Thompsontown Baptist Church, 269 Birch Dr., Thompsontown, PA 17094. All who knew and loved Curt are welcome to attend and share in honoring his memory.

In lieu of flowers, any memorial contributions may be made to Thompsontown Baptist Church where Curt was a longtime member. 

Arrangements are under the care of Heller-Hoenstine Funeral Home, Woodlawn, 200 N. Main St., Lewistown.

Online condolences may be offered to the family at www.hellerhoenstinefuneralhome.com