Mark is a member of the firm, practicing in the Bankruptcy, Insolvency, and Restructuring Practice Group. He is the office managing partner of the Wilmington office and co-chair of his practice group.

Mark has a broad commercial practice, focusing in the areas of Chapter 11 reorganization and general insolvency law. He has represented all constituencies in corporate restructurings both in and out of Chapter 11, including debtors, unsecured creditors' committees, plan trustees, secured creditors, trade creditors, landlords, equipment lessors, reclamation creditors, insurance companies, and equity security holders as well as acquirers of troubled businesses.

Mark’s practice includes in large part: (i) counseling debtors through non-judicial restructurings and Chapter 11 proceedings; (ii) advising unsecured creditors’ committees in chapter 11 proceedings; and (iii) representing trustees in complex Chapter 7 cases.

Mark is a certified mediator for the United States Bankruptcy Court for the District of Delaware, and has an active mediation practice. He is certified by the American Board of Certification in business bankruptcy, and is AV rated by Martindale Hubbell. Mark has been designated as a "Super Lawyer" in both Delaware and Pennsylvania and has been listed in Chambers USA as a leading bankruptcy lawyer in Delaware for the past several years.

Mark graduated from Rochester Institute of Technology, with high honors in 1985, and received his J.D. in 1989 from Boston University.