John K. Jonak

Per the campaign site.

He has spent more than 27 years in Illinois public education, including as a teacher and athletic director at Heritage Middle School in Berwyn, assistant principal at Mannheim Middle School, principal at Westmont Junior High School, superintendent of Rosemont School District 78, and, since July 2025, Kane County Regional Superintendent, per his campaign site. He is a retired Sergeant First Class in the Illinois Army National Guard who deployed to Afghanistan and supported Hurricane Katrina relief, per his campaign site.