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Charles J. Dennen

Charlie’s practice focuses on all areas of toxic tort and environmental law. He represents clients in all stages of litigation in complex multi-party matters in both federal and state courts. Charlie represents clients in complex environmental matters, as well as civil and administrative litigation, and has advised clients on issues under CERCLA, RCRA, the New Jersey Spill Act, and other federal and state environmental statutes and regulations. In particular, he is experienced in pursuing and defending complex environmental litigation matters, such as claims involving contribution and cost recovery, underground storage tanks, soil and groundwater contamination, diminution in value to property, economic and non-economic damages, cleanup and response costs, Natural Resource Damages, and physical and psychological injuries. Charlie also has experience serving as plaintiff’s counsel in toxic tort matters.

In addition to being well-versed in toxic tort and environmental matters, Charlie has experience representing both plaintiffs and defendants in other areas of litigation, such as eminent domain, commercial contract disputes, trademark infringement, personal injury matters, and landlord/tenant disputes.

Charlie’s practice spans all aspects of litigation, including drafting pleadings, drafting discovery requests and responses, managing large scale document reviews and productions, taking and defending depositions, working extensively with expert witnesses in highly complex and technical areas, drafting and arguing dispositive motions, and taking cases to trial.

Charlie graduated cum laude from Rutgers School of Law – Camden where he received the First Year Legal Writing Award and the Reed Smith Clinical Excellence Award. During law school, Charlie was an associate editor for the Rutgers Journal of Law and Public Policy, a board member for the Hunter Moot Court program, interned for the Honorable Dora L. Irizarry in the Eastern District of New York, and externed for the Honorable Renee Marie Bumb in the District of New Jersey.

Representative Experience

  • Successfully obtained summary judgment for alleged generator in CERCLA action in the District of New Jersey seeking recovery of costs for landfill remediation involving over 300 potentially responsible parties.
  • Currently serves as lead counsel for alleged responsible party in CERCLA action in the Eastern District of Pennsylvania seeking recovery of costs for landfill remediation involving over 1,000 potentially responsible parties.
  • Currently represents a Fortune 500 plaintiff in CERCLA cost recovery and contribution action in the District of New Jersey for response costs incurred to United States Environmental Protection Agency.
  • Represented a Fortune 500 company in defense of a multi-billion dollar action brought by the New Jersey Department of Environmental Protection for cleanup and removal costs and damages associated with the Passaic River.
  • Currently represents a major petroleum company in defending products liability and Natural Resource Damages claims associated with gasoline additive methyl tertiary butyl ether (MTBE) in multiple federal multi-district litigations brought by numerous state natural resource trustees,
  • Currently represents multiple Fortune 500 companies in defense of complex Natural Resource Damages actions in New Jersey State court involving two history refinery properties being remediated.
  • Represented a major petroleum company in defense of multi-billion dollar action brought by New Jersey Department of Environmental Protection concerning alleged Natural Resources Damages at a major refinery, including extensive trial preparation.
  • Represents multiple companies pursuing and defending claims of polychlorinated biphenyl (PCB) and perfluorinated alkyl substances (PFAS) contamination at multiple sites in New Jersey and New York.
  • Served as trial counsel in New Jersey for redevelopment authority in eminent domain action. Obtained favorable jury verdict in eminent domain valuation trial.
  • Successfully represented redevelopment authority in defeating landowner’s complaint in lieu of prerogative writs action in New Jersey State court.

Professional and Community Involvement

  • Chamber of Commerce of Southern New Jersey
  • Rutgers Law Alumni Association Board
  • Rutgers Law Alumni Association Young Lawyers Committee, Chair
  • Camden County Bar Association
  • South Jersey Young Professionals Association Board of Trustees

Awards and Recognition

  • Named to Best Lawyers in America as “Ones to Watch” for Energy Law (2021, 2022) and Environmental Law (2022)
  • First Year Legal Writing Award
  • Reed Smith Clinical Excellence Award

Articles and Presentations



Charles Dennen Promoted to Board of Trustees of South Jersey Young Professionals Association

Two Recent Decisions May Limit the Effectiveness of “Submarine Patents”

Ask Archer: A Fireside Chat on a Recent Appellate Division Decision Regarding Supplier Liability under New Jersey’s Spill Act