Sitzmann's grandfather served three terms as a Plymouth County supervisor.
[1] Sitzmann was born and raised near Le Mars, Iowa, and attended Gehlen Catholic High School and the University of Northern Iowa, where he earned a degree in political science.
[2] After graduating from UNI, Sitzmann worked successively for Wells Enterprises and SmithCo Manufacturing in environmental health and safety, and The Travelers Companies as a risk consultant.
[4] Sitzmann defeated Noah Wieseler in the Republican Party primary for Iowa House District 13 in 2024.
[5] Sitzmann won the general election as well, against the Democratic Party candidate Rosanne Plante and political independent Parker Hansen.