Karen Susan Mueller of Western Springs, Illinois, age 61, at rest November 9, 2018 after a five month battle with lung cancer. She is survived by her husband of 31 years Mark Mueller and brother Steven Helis of Western Springs. Karen was preceded in death by her parents Stephen and Ruth Helis of Western Springs. Karen was an alumnus of St. John of the Cross School in Western Springs and Lyons Township High School and earned a degree in advertising at the University of Illinois At Urbana-Champaign. She met her future husband while working at the student-run radio station WPGU in Champaign, rising to general manager. Later she was a copywriter and assistant buyer for the Sears catalog and was a partner with her husband in Mueller Broadcast Design, a broadcast engineering consulting company in La Grange, Illinois. In lieu of flowers, donations in Karen’s memory to PAWS Chicago, 1997 N. Clybourn Ave., Chicago, IL 60614. (773) 475-4242. A memorial celebration of Karen’s life will be held early in 2019.