A resident of Rochester, Illinois, Jeffrey Kallister has worked at S&K Buick GMC in Springfield, Illinois, for nearly two decades. He is currently the owner/operator. Under the leadership of Jeffrey P. Kallister, the Illinois dealership was recognized as a top performer in Springfield in 2025.

Mr. Kallister leads S&K Buick GMC with a strong commitment to supporting charitable and community initiatives throughout the Springfield area. The dealership contributes to organizations focused on child welfare, food security, military families, cancer awareness, and Alzheimer’s advocacy, while also participating in local fundraising events and youth programs. In addition, the company supports educational and community development efforts through involvement with local schools, athletics, and automotive training programs. This community engagement also extends into media outreach, where he oversees and helps facilitate the monthly AM Springfield broadcast hosted at the dealership and has served as a guest host for the program periodically.

Jeffrey P. Kallister completed automotive training through the National Automobile Dealers Association Academy, where he earned a diploma in automotive education. He also holds a bachelor’s degree in radio and television communications from Bradley University.