Jeffrey T. Cernek is an attorney and the co-owner of Glendale Builders, a home builder. A longtime Glenview resident, Jeffrey also worked as a realtor for ERA Doetsch Realty in the 1990s. A former leader in the Young Lawyers Section and the Bench-Bar Relations Committee of the Chicago Bar Association, Jeffrey is an Elder in the First Presbyterian Church of Glenview; a former coach in AYSO, Glenview Youth Baseball, and Glenview Park District Basketball; and a former director of the Glenbrook South Instrumental League.

A graduate of Knox College (B.A., 1980) and the Chicago-Kent College of Law (J.D., 1984), Jeffrey was admitted to the Illinois Bar in 1984 and the U.S. District Court of Northern Illinois Bar in 1985. He has operated his private practice since 1994.

Jeffrey is interested in continuing the good governance of the Northfield Township government, as it provides needed services to those in need, maintains 28 miles of road in the township's many unincorporated areas, and has kept its tax levy low.