Mark C. Kieffer Obituary
With heavy hearts, we announce the death of Mark C. Kieffer (Frankfort, Illinois), who passed away on January 30, 2026 at the age of 70. Family and friends are welcome to leave their condolences on this memorial page and share them with the family.
He was predeceased by: his son Ryan. He is survived by: his wife Doreen Kieffer (Guziejka); his son Jason Kieffer; his daughter-in-law Alicia; his grandchildren, Vivienne, Jude, Leo, Mary and Camilla; and his siblings, Dave Kieffer (Vicki), Sharon Connor (Tom) and Diane Killian (Randy). He is also survived by many extended family members, friends.
In lieu of flowers, memorial donations may be made to: Tunnels to Towers: Donate to Tunnel to Towers Foundation http://www.t2t.org. please note: in honor of Mark Kieffer and use [email protected] for any recipient messaging.
