ADR Systems
Hon. Jack Callahan, (Ret.) serves as a Senior Mediator and Arbitrator at ADR Systems since April 2022. Prior to this role, Callahan was a Circuit Court Judge for Cook County Government from June 2009 to April 2022, overseeing various divisions including Jury Trials, Motion Calls, Probate, and Traffic. Callahan's legal career also includes time as an attorney at Sullivan Hincks & Conway, focusing on Business and Real Estate Law from June 1996 to June 2009, and as an Assistant Cook County State Attorney in the Federal Trial Division from June 1989 to June 1996. Callahan began a professional journey as a Tax Consultant at PwC from June 1988 to June 1989. The educational background includes a Doctor of Law (JD) degree from Chicago-Kent College of Law and a Bachelor of Science (BS) in Accounting from Marquette University.