Mark S. Heinzelmann

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Mark counsels business clients on regulatory issues, dispute resolution, and federal and state court litigation. Mark is well-versed in the current enforcement and regulatory agendas driving the New Jersey Department of Environmental Protection.

Prior to joining the firm, Mark served as a Deputy Attorney General for the State of New Jersey’s Department of Law & Public Safety, Division of Law, and Environmental Enforcement and Cost Recovery department. In that capacity, he assisted the Department of Environmental Protection in recovering unpaid costs for the remediation of contaminated sites and was involved in enforcing the Spill Compensation and Control Act, Water Pollution Control Act, Underground Storage Tank Act, Industrial Site Recovery Act, Brownfield and Contaminated Site Remediation Act, and Site Remediation Reform Act. He advised on the establishment and enforcement of liens and executed enforcement actions in municipal court and the Office of Administrative Law. Mark also worked extensively on issues involving the New Jersey Spill Compensation Fund and Hazardous Discharge Site Remediation Fund claims programs and advised on the legal impact of new hazardous substance remediation standards.

Mark has handled all aspects of environmental litigation. Notably, he tried a case involving complex expert testimony related to Superstorm Sandy before the Office of Administrative Law. He also argued numerous appeals in the Appellate Division, including: Cranford Development Associates v. Township of Cranford, 2016 N.J. Super Unpub. LEXIS 955 (April 26, 2016 App. Div.); CD&L Realty, LLC v. State, 2015 N.J. Super. Unpub. LEXIS 1832 (July 30, 2015 App. Div.); and Drytech, Inc. v. State, N.J. Super. Unpub. LEXIS 2750 (December 29, 2016 App. Div.). In Morristown Assocs. v. Grant Oil Co., 220 N.J. 360 (2015) before the New Jersey Supreme Court, Mark authored a brief advocating the Department of Environmental Protection’s position.

Prior to joining the Division of Law, Mark served as a law clerk to the Hon. Edward M. Coleman, P.J.Ch., Superior Court of New Jersey, Chancery Division. He also held internships on the 9/11 Commission Monograph Project, in the New Jersey Office of the Public Defender, and in Judge Coleman’s chambers.