- Circuit Court judge, First Judicial Circuit of the State of Illinois, December 1992 – 2018. Extensive experience presiding over criminal and civil jury trials and proceedings. Excellent evaluations as a judge in all areas, including legal knowledge, temperament, and integrity.
 - Chief Judge of the First judicial Circuit of the State of Illinois, 2008 2014.
 - Member, Illinois Judicial Conference, 2006 – 2018, with years of service on its Executive Committee, Strategic Planning Committee, Education Committee, and Committee on Judicial Bench Books. [Co-Chairman of the 2014 Education Conference for all Illinois Judges Workgroup. Chairman of the 5th Edition of the Criminal Law and Procedure Bench Book for Illinois Judges Sub-Committee].
 - Frequent faculty member and panelist for CLE presentations for lawyers and judges.
 - Mentor Judge, certified by the Illinois judicial Mentor Committee to assist new judges.
 - Certificate of Completion: 40-hour Comprehensive Civil Mediation Training, 2010.
 - State’s Attorney of Alexander County, Illinois, 1984 – 1992.
 - Attorney in the private general practice of law, with emphasis on litigation in federal and state courts, 1982 – 1984.
 - Graduated from the University of Illinois College of Law at Champaign-Urbana, 1982.
 - Mark H. Clarke focus his practice in:
- Alternative Dispute Resolution
 - Mediation and Arbitration
 
 
