Thomas P. Wagner: Lawyer with Marshall Dennehey Warner Coleman & Goggin, P.C.

Thomas P. Wagner

Thomas P. Wagner is a shareholder with Marshall, Dennehey, Warner, Coleman & Goggin. Mr. Wagner is a litigation and trial lawyer with more than 25 years experience. He concentrates his practice on the defense of casualty and product liability cases, as well as the defense of municipalities.
Phone(215) 575-4562

Peer Rating
AV® Preeminent

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Practice Areas

  • Casualty and Premises Liability
  • Product Liability
  • Municipal Liability
  • Medical Devices
University Fairfield University, B.A., cum laude, 1974
Law SchoolSt. John's University School of Law, J.D., 1977
Admitted1978, New York; 1978, Pennsylvania

Associations & Memberships
•Defense Research Institute
•Disciplinary Board of the Supreme Court of Pennsylvania, Hearing Committee Member
•Philadelphia Association of Defense Counsel, Executive Board, 1997 -1999
•Philadelphia Court of Common Pleas, Discovery Master
•Temple American Inn of Court, President, 1999-2000


Thomas P. Wagner is a litigation and trial lawyer with more than 30 years experience. He concentrates his practice on the defense of casualty and product liability cases, as well as the defense of municipalities. His practice is focused primarily on the state and federal courts of Eastern Pennsylvania and the surrounding Mid-Atlantic region.

Mr. Wagner was twice voted by his peers as one of the Top 100 Lawyers in Pennsylvania, a state with more than 56,000 attorneys. He has been named a Pennsylvania Super Lawyer eleven times in succession. He has written numerous articles and presentations on topics related to civil litigation. He also served as a senior editor of a three-volume guide to pre-trial practice in the federal courts of the Third Circuit published by Lawyers' Cooperative Publishing Company. He has served on the executive board of the Philadelphia Association of Defense Counsel, and he has been appointed as a Hearing Committee Member serving the Disciplinary Board of the Supreme Court of Pennsylvania.

With strong ties to his community, Mr. Wagner is vice president of the Town Council in Upper Darby Township, Pennsylvania, and a board member for the Upper Darby Industrial Development Authority. He has been a board member of the Delaware County Authority since 2001, and he served on the board of directors for Wheels of Wellness, a non-profit organization, from 2001 to 2007.

Mr. Wagner graduated cum laude from Fairfield University in 1974 with a Bachelor's Degree in Politics. He attended law school at St. John's University, where he was an editor of the law review. Following law school, he served a clerkship with the Honorable J. William Ditter, Jr., United States District Judge for the Eastern District of Pennsylvania. He joined the law firm of Rawle & Henderson at the end of his clerkship in 1980, and served for over a decade on Rawle & Henderson's Executive Committee. Mr. Wagner joined Marshall Dennehey Warner Coleman & Goggin in 2007 as a shareholder in the firm's casualty practice, and he now manages one of the three major casualty groups in Philadelphia. He is admitted to practice in Pennsylvania and New York.

Classes/Seminars Taught

•Trial Team Coach, Earle Mack School of Law, Drexel University, 2008

Managing Complex Litigation, National Judicial College - Special Presenter, Reno, NV, May 2006

The Patient Advocate in Clinical Trials, Annual Medical Device Product Liability Conference, Napa, CA, June 2006

Bad Faith and How To Avoid It, Presented to the Pennsylvania Medical Society Liability Insurance Company, Harrisburg, PA, July 1996

Selected Topics in Federal Preemption, Presented to the Pennsylvania Bar Association, Philadelphia, April 1996 and Hershey, PA, May 1995

Litigation Experiences of a Blood Center, Presented to the American Society of Apheresis, Cambridge, Mass., April 1993

The Law and Alternatives to Homologous Donation, Greater Philadelphia Hospital Blood Bank Assn. & Philadelphia Medical Society; Philadelphia, May 1991

•National Institute for Trial Advocacy, Mid-Atlantic Deposition Program, Faculty Member

Published Works

•Federal Civil Procedure Before Trial - Third Circuit, Senior Editor, Lawyers Cooperative Publishing Company, (3 Volumes), 1996

•Rule 11 and Removal of Cases, 32 For the Defense No. 3 Reprinted from Counterpoint, July 1989, March 1990

•Diversity Jurisdiction: Don't Let It Die, 32 For the Defense, No. 8, August 1990

•Dillinger v. Caterpillar - Can the Plaintiff Do No Wrong?, Counterpoint, July 1992

•New Developments in Res Ipsa Loquitur, (Co-Author), Counterpoint, July 1991

•Sex Discrimination by Private Universities as State Action, 50 St. John's Law Review 316, 1976

Honors & Awards
• AV Preeminent by LexisNexis Martindale-Hubbell
• Best Lawyers in America - Personal Injury Litigation-Defendants, 2013
•Pennsylvania Super Lawyer, 2004-2014; Top 100 Pennsylvania: 2006-2007; Top 100 Philadelphia: 2006-2007

Year Joined Organization


Reported CasesSignificant Representative Matters; Philadelphia Zoo Fire Litigation - Successful representation of target defendant in catastrophic fire loss. ; Artificial Heart Litigation - Achieved dismissal of client defendant in complex medical device product liability case. ; Plunto v. Wallenstein - Defense verdict in multi-defendant civil rights trial.

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Office Information

Thomas P. Wagner

2000 Market Street, Suite 2300
PhiladelphiaPA 19103


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