Mark N. Cohen

Mark N. Cohen

Office:Philadelphia, PA
Phone:(215) 931-5848
Cell:(215) 771-4498

Mark N. Cohen focuses on environmental/toxic tort law and handles matters involving the Comprehensive Environmental Response, Compensation and Liability Act, Resource Conservation and Recovery Act, Pennsylvania Hazardous Sites Cleanup Act, Underground Storage Tank Act, and Clean Streams Law.

Mark also serves as national coordinating counsel for manufacturers, suppliers, and distributors in asbestos litigation. He defends landlords and property owners in lead paint and toxic mold litigation, and manufacturers, suppliers and landowners in a variety of chemical exposure and premises liability claims.

An active member of the Philadelphia Bar Association, Mark has served as an elected member of its Board of Governors and as Co-Chair of the Civil Litigation Section and Civil Rules and Procedure Committee.

Mark is a former Deputy Attorney General for the Commonwealth of Pennsylvania, serving as Assistant Section Chief of the Enforcement Division and Civil Litigation Division. He is a certified arbitrator in the Philadelphia County Court of Common Pleas and the U.S. District Court for the Eastern District of Pennsylvania.


  • Villanova University School of Law (J.D.)
  • Pennsylvania State University (B.S.)


  • AV Martindale-Hubbell Peer Review Rated
  • Selected as a “Top Rated Lawyer in Mass Torts Law" by American Lawyer Media and Martindale-Hubbell
  • Selected as a “Top Rated Lawyer for Energy Law, Environmental Law, Land Use Law” by American Lawyer Media and Martindale-Hubbell
  • Selected as a "Top Rated Lawyer in Litigation" by American Lawyer Media and Martindale-Hubbell

Mark N. Cohen

Bar Admissions:

  • Pennsylvania

Court Admissions:

  • U.S. Supreme Court
  • U.S. Court of Appeals, Third Circuit
  • U.S. Court of Appeals, First Circuit
  • U.S. District Court, Eastern District of Pennsylvania
  • U.S. District Court, Middle District of Pennsylvania

Professional Affiliations:

  • Pennsylvania Bar Association | Section on Environmental, Mineral and Natural Resources Law
  • Pennsylvania Defense Institute
  • Philadelphia Bar Association
  • - Board of Governors, former member
  • - State Civil Litigation Section, former liaison to Board of Governors
  • - Commission on Judicial Selection and Retention, former member
  • - State Civil Litigation Section, former co-chair
  • - State Civil Litigation Section’s Civil Rules and Procedure Committee, former co-chair
  • - Environmental Law Committee
  • - Volunteers for the Indigent Program
  • - Subcommittees on City Hall Security, Disaster Planning, and Judge Pro Tem Program
  • Philadelphia Association of Defense Counsel
  • Tau Epsilon Rho Law Society, former chancellor
  • Louis D. Brandeis Law Society, executive committee
  • Louis Brandeis Foundation, founding member

Speaking Engagements and Presentations:

  • Litigation Issues Facing Practitioners in the First Judicial District
  • Environmental Law: Business Compliance with Profitability
  • Civility in the Courtroom and Beyond

Articles and Publications:

Representative Matters:

  • Whitehead v. A.W. Chesterton, Inc. - Successfully defended sellers of asbestos-containing products in malignancy claim establishing clients’ products sold were not substantial contributing factors in bringing about Plaintiff’s injuries.
  • Kenepp v. American Edwards Laboratories - Successfully defended product manufacturer against chemical exposure and failure to warn claims brought under FIFRA.
  • Ivy Shore and The Pepper Group, Inc. v. REACT Environmental Services, Inc. - Successfully defended environmental remediation firm against allegations of breach of contract and negligence related to an environmental assessment of commercial property.
  • Estate of Davis v. Sunoco, Inc. - successfully defended seller of printing inks and supplies against claims of pressman alleging benzene in those products caused him to develop leukemia.
  • Sowers v. Johnson & Johnson Medical, Inc. - Successfully defended client alleged to have injured plaintiff through defectively manufactured and packaged chemical cleaning products.
  • United States v. Alcan Aluminum - Successfully defended PRP client’s interest and private consent decree with Department of Justice against claims of third-party interveners.
  • The Chesapeake & Potomac Telephone Company of Virginia v. Peck Iron & Metal Company, Inc. - successfully defended private PRP contribution action seeking the remediation costs from client under CERCLA and corporate successor liability laws.

Mark N. Cohen