William T. Gibbs is a trial attorney at the Chicago personal injury and medical malpractice law firm of Corboy & Demetrio and concentrates his practice on cases arising from participation in sports, automobile collisions, construction negligence, medical negligence, premises liability, product liability, aviation litigation, and railroad negligence.

Bill has obtained record-setting and multi-million dollar verdicts and settlements on behalf of his clients. He, along with his partners, secured a $29.6 million verdict on behalf of a woman who was seriously injured in the derailment of a Metra train. The verdict is the largest in Illinois for an individual injured in a mass transit crash. In a Federal District Court case, he obtained a $6.6 million verdict for a family injured in an automobile collision. It was the largest verdict ever in that Court. He also secured a $1.5 million settlement for a health club member who sustained injuries to his wrist when pushed to the ground by another member.  And in a case in which he represented a future Hall-of-Fame Major League Baseball player, the matter was "resolved amicably" with the team physicians.  

He is a member of numerous legal organizations including the American Association for Justice, Illinois Trial Lawyers Association, the Chicago Bar Association and the Notre Dame Law Association. In 2008, Bill authored an article, "A Quick Guide to the Illinois Dead Man’s Act," which was published in the Illinois Bar Journal, a publication of the Illinois State Bar Association. Bill is a frequent panelist and lecturer to local and state bar associations.

In October, 2009, Bill was named by the Law Bulletin Publishing Company, which publishes the Chicago Daily Law Bulletin and Chicago Lawyer magazine, to its list of "40 Illinois Attorneys Under Forty to Watch," and for the last four years, he has been designated an Illinois Super Lawyer, Rising Star. 

Active in many community organizations, Bill is a member of the Chicago Police Memorial Foundation Advisory Board. Through the Mercy Home for Boys, he provides pro bono legal assistance to individuals who are unable to afford private counsel.

Bill was a high school computer science teacher and varsity football, basketball, and baseball coach prior to his legal career. While at the University of Notre Dame, he was a defensive back on the varsity football team.