Mark is the Chair of the firm's Creditors' Rights and Bankruptcy Practice and Co-chair of the Business and Commercial Litigation Practice. He focuses his practice in commercial litigation. Mark represents commercial lenders, financial institutions and other creditors in enforcing secured and unsecured claims in the state and federal courts. He represents creditors in Chapter 7, 11, 12 and 13 bankruptcies in the Bankruptcy Courts of Northern, Central and Southern Districts of Illinois, the Eastern and Western Districts of Missouri and the Southern District of Iowa. He represents construction clients and property owners in mechanics lien disputes. He also represents creditors in foreclosure actions and he has extensive experience litigating contract claims.

Mark also has an active asbestos and toxic tort practice. He represents product, equipment and premises defendants in asbestos litigation throughout Illinois. He has responsibility for all areas of case development and trial preparation. He develops expert witness testimony and regularly deposes plaintiffs and other fact witnesses, as well as opposing experts. He also has extensive experience in dispositive motion practice.