Deon graduated from the College of Architecture at the University of Nebraska in 1961.
Deon married Susan Niemann in 1964.
Deon was one of the founding principals of Bahr & Hanna Architects, later Bahr, Vermeer & Haecker (now BVH) Architects, which received the Firm of the Year Award, the Cornerstone Award from the Lincoln Chamber of Commerce, and 190 design awards.
Deon served on numerous boards including the Lincoln Community Foundation, the Nebraska Art Association, the Lincoln Arts Council, the MEDICI Foundation, the Hixson Lied College of Fine and Performing Arts, and the Architectural Advisory Committee of the Lutheran Church Extension Fund.
Deon received many professional and civic awards including induction into the College of Fellows of the American Institute of Architecture, the Harry S. Cunningham Medal, Member of the Royal Society for Arts, Manufactures and Commerce, Vikings of Distinction from Omaha North High School, the Distinguished Service Award from Concordia University, and Distinguished Alumni of the UNL College of Architecture.
After retirement, Deon pursued his love of creating art. His paintings and sculptures are displayed in numerous museums in Nebraska. He loved music, playing clarinet and saxophone, photography, travel, birdwatching, marbles and yoyos.
Deon is predeceased by his parents and son Peter Bahr.
Deon is survived by his wife Susan, his sons John (Jeanine) and David (Cindy), five grandchildren, sister Donajean (Bert) Sherwin, and numerous nieces and nephews.
Memorial service: 11:00 am Thursday, February 6, 2025, Redeemer Lutheran Church, 510 South 33rd Street.
In lieu of flowers, Deon requested donations to the University of Nebraska Foundation, PO Box 82555, Lincoln NE 68501-2555 with a note that the gift is for the College of Architecture Scholarship Fund or Redeemer Lutheran Church Foundation, 510 South 33rd St, Lincoln NE 68510 with a note that the gift is for Seminary Students Scholarships.