About William K. Gullberg
William K. Gullberg Jr. earned a Bachelor of Science in Accountancy from Western Illinois University in 1973 and a Juris Doctor from the University of Illinois at Urbana-Champaign in 1976. His educational path combined training in numbers and law. That combination shaped the early contours of his legal practice.
He is admitted to practice in Illinois and before the U.S. Court of Appeals for the Seventh Circuit. Those admissions reflect a career that spans multiple levels of the judiciary. He brings courtroom experience in both state and federal settings.
Gullberg has been a senior partner at Gullberg, Box & Worby LLC since 1997. He joined the firm and rose into its leadership, taking on management duties alongside casework. Over the years he has handled matters that draw on his accountancy background as well as his criminal defense training.
His practice has included work on criminal defense and DUI cases. He is a longtime member of the National College for DUI Defense, holding membership since 2000. He also belongs to the Illinois Association of Criminal Defense Lawyers. Those connections reflect sustained engagement with practitioners who handle similar legal issues.
Gullberg maintains a broad set of professional affiliations. He is a current member of the Illinois State Bar Association, the Warren County Bar Association, and the Lawyers Title Guaranty Fund, Inc. Locally, he has been active in bar governance. He has served as president of the Henderson County Bar Association since 2011, a role that involves coordination among judges and lawyers and attention to local court administration.
Clients and colleagues describe him as steady and methodical. He relies on his accounting training when cases turn on financial records or forensic accounting. He also draws on decades of courtroom practice when preparing for hearings and trials. Today he practices at Gullberg, Box & Worby LLC, where his work centers on criminal defense and DUI matters.
