Mary L. Siebert, 85, passed away on Friday, December 24, 2021. Mary is the beloved wife of the late Roland Siebert; dear daughter of the late Herbert and Mary Guempel; loving mother of Gary (Dianne) Siebert, Jeffrey Siebert and the late Clifford Siebert; cherished grandmother of Ashley (Brad) Mosello, Caleb Siebert, Olivia Siebert, Patrick (Samantha) Siebert, Christopher Siebert, Ryan Siebert and Michael Siebert; cherished great-grandmother of Landen Mosello, Brody Mosello, Arthur Siebert and Phillip Siebert; dear sister of the late Leona Parsons Memorials to Our Savior Lutheran Building Fund may be made in Mary's memory. Visitation: Thursday, December 30, 2021 from 4:00 P.M to 8:00 P.M. Funeral Service: Friday, December 31st at 8:30 a.m. Interment to Follow at Jefferson Barracks National Cemetery