Casey has concentrated his career solely in the area of Illinois Workers’ Compensation and areas of the law associated with it. He practices before the Illinois Workers’ Compensation Commission in Chicago and the collar counties. After law school he was a Law Clerk at the Circuit Court of Cook County in the section that heard Workers’ Compensation Judicial Reviews. He has represented injured workers, but for the past 23 years his focus has been on defending Illinois employers exclusively. Casey has argued and won cases at both the Circuit Courts and the Workers’ Compensation Commission of the Illinois Appellate Court.