Jonathan D. Weiss: Lawyer with Marshall Dennehey Warner Coleman & Goggin, P.C.

Jonathan D. Weiss

Jonathan D. Weiss is a shareholder with Marshall, Dennehey, Warner, Coleman & Goggin. His practice is devoted largely to medical and dental malpractice, construction litigation, architectural/engineering and other professional liability, premise, motor vehicle and products liability, as well as commercial litigation.
Phone(215) 575-2815

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Experience & Credentials

Practice Areas

  • Medical Malpractice
  • Dental Malpractice
  • Construction Litigation
  • Commercial Law
  • Product Liability
  • Premises Liability
  • Subrogation
University University of California Santa Cruz, Santa Cruz, California, B.A., 1989; Old Dominion University, Norfolk, Virginia, M.A., English, 1992 Awarded graduate teaching assistantship
Law SchoolTemple University School of Law, Philadelphia, Pennsylvania, J.D., 1996 1995 Samuel J. Polsky Moot Court Finalist/Moot Court Honor Society
Admitted1996, Pennsylvania; 1996, New Jersey

Associations & Memberships

•Philadelphia Bar Association
•Philadelphia Defense Counsel Association
•Whitemarsh Township, former township supervisor; former vice-chair, Environmental Advisory Board; former democratic committeeperson


Jonathan is a member of the firm's Health Care Liability Practice Group. His areas of practice include medical and dental malpractice, construction litigation, architectural/engineering and other professional liability, premises liability, motor vehicle liability and product liability, as well as commercial litigation.

Jonathan has represented doctors, dentists, nurses, engineers, contractors, property owners, property management companies and other professional organizations. He regularly handles catastrophic injury cases, including cases with multi-million dollar personal injury claims, as well as cases involving multi-million dollar architectural/engineering and construction defect claims.

Jonathan has been involved in numerous multi-party mediations and has handled class action law suits. He has successfully litigated numerous cases, including those leading to a favorable opinion from the Third Circuit Court of Appeals on Section 1983, a favorable District Court opinion on an issue of first impression involving federal trucking regulations and various state court opinions on medical and commercial matters. He has also coordinated the use of multiple experts to address liability, causations and damages in high-profile cases.

Jonathan is a member of the Philadelphia Defense Counsel and the Philadelphia Bar Association. He also served a four-year term as a supervisor of Whitemarsh Township.

Prior to joining Marshall Dennehey in the fall of 1996, Jonathan interned with Community Legal Services and the Environmental Protection Agency and acquired experience in civil litigation. Jonathan also interned as a summer clerk for the Honorable Stanley S. Brotman of the U.S. District Court.

Jonathan earned his Bachelor of Arts degree from University of California-Santa Cruz in 1989, a Master's Degree in English from Old Dominion University in 1992 and his juris doctor from Temple University School of Law in 1996. While at law school, Jonathan was on the editorial staff of the Temple International and Comparative Law Journal and was a finalist in the 1995 Samuel J. Polsky Moot Court Competition.

Year Joined Organization


Past Employment Positions

•Community Legal Services, intern

•Environmental Protection Agency, intern

•United States District Court, Honorable Stanley S. Brotman, summer clerk

Reported CasesPublished Works: Pennsylvania Superior Court Holds That Root Canal Requires Informed Consent, Defense Digest, Dec. Vol. 5, No. 6, 1999; When Does A Business Invitee Entering A Construction Site Become A Trespasser?, Defense Digest, Vol. 4, No. 5, 1998; Car Dealerships, Stolen Cars, And The Unattended Motor Vehicle Statute: No Negligence Per Se, But Does This Hold True Where The Theft Is By An Employee?, Defense Digest, Vol. 3, No. 4, 1997; The Balance Of Nature And Human Needs In Antarctica: The Legality Of Mining, Temple International And Comparative Law Journal
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Office Information

Jonathan D. Weiss

2000 Market Street, Suite 2300
PhiladelphiaPA 19103


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