Representative C.D. Davidsmeyer was born and raised in Jacksonville, Illinois. He attended Jacksonville High School and received his BA in Political Science from Miami University in Ohio. Following graduation, Davidsmeyer worked as a Legislative Assistant to Congressman John Shimkus in Washington, DC.
In 2006, he returned to Jacksonville to become Operations Manager of IRC Inc., a subsidiary of Illinois Road Contractors, Inc. In 2009, he became Vice President of IRC where he continued his duties of Operations Manager adding all budget responsibilities and financial decisions of the company.
Representative Davidsmeyer joined the Jacksonville City Council in 2008. He served as the Chairman of the Public Protection Committee and Chair of the Finance Committee. During that time, he also served as an officer in the local Chamber of Commerce, Rotary and Library Board. Representative Davidsmeyer joined the House of Representatives in December 2012. Representative Davidsmeyer and his wife Kristen along with their two boys reside in Jacksonville.