Michael L. Detweiler

Michael L. Detweiler: Attorney with Marshall Dennehey Warner Coleman & Goggin, P.C.
  • Shareholder at Marshall Dennehey Warner Coleman & Goggin, P.C.
  • 2000 Market Street, Suite 2300, Philadelphia, PA 19103
    View Michael L. Detweiler's office location
  • Michael L. Detweiler is a shareholder with Marshall, Dennehey, Warner, Coleman & Goggin in the firm's Casualty Department. Michael has experience defending a wide array of cases, including products liability, construction litigation, municipal liability, premises liability, contractual claims, motor vehicle, and other personal injury cases.
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Michael is a member of the Casualty Department where he has successfully defended matters in jurisdictions throughout Pennsylvania. Michael's past and present clients include construction companies, tour operators, travel agents, resorts, local municipalities, governmental transportation agencies, medical device manufacturers, and numerous other individuals and entities. He has also successfully defended entities and individuals in commercial and breach of contract disputes.

In his career, Michael has obtained numerous defense verdicts and summary judgments in the state and federal courts of Pennsylvania and New Jersey. His extensive experience with both professional liability and casualty matters provide an invaluable advantage in representing clients in those matters which require a firm grasp of both practice backgrounds.

Prior to joining Marshall Dennehey, Michael was Assistant City Solicitor with the City of Philadelphia Law Department for two years. He defended police officers, corrections officers and various City of Philadelphia employees and agencies in civil lawsuits.

Michael graduated magna cum laude from Dickinson College in 1998 and from Boston College Law School in 2002. He is licensed to practice in Pennsylvania, New Jersey and Massachusetts.

Classes/Seminars Taught

Defending Planned Community Association Cases: Directors and Officers Liability, Property, and Other Liability Issues, Engle Martin & Associates, March 2016

Legal Issues for Internet Travel Sellers and Travel Insurance for Industry and Consumers, Pennsylvania Bar Institute (PBI) Travel Law Seminar, Philadelphia, May 1, 2014

Insurance Agents and Brokers Best Claims Practices in Claims Administration and Underwriting, Liberty Mutual Insurance, December 2013

Honors & Awards

•Pennsylvania Super Lawyer Rising Star, 2007-2008, 2010-2016

The 2016 Super Lawyers list is issued by Thompson Reuters. A description of the selection methodology can be found here . No aspect of this advertisement has been approved by the Supreme Court of New Jersey.

Year Joined Organization: 2005


Travel Law
Seminar • May 1, 2014
Michael Detweiler, shareholder in our Professional Liability Department, will be a featured speaker at the PBI Travel Law seminar, to be held May 1 in Philadelphia. Michael and other panelists will discuss hot topics in the field of travel law,...


When Accidents Happen: Legal Defense for Travel Advisors
Articles • February 1, 2019

Attorney Cites Considerations for Agents Operating as Independent Contractors
Articles • September 1, 2014

Major Victories

Defense Achieves Dismissal of Claims Against University
Dec 6, 2016
The defense prevailed on a motion to dismiss on behalf of a distinguished Roman Catholic university. The plaintiff, a temporary staffing worker assigned to work at the university, alleged personal injuries as a result of a slip and fall in the...

Costa Rica Tour Operator Dismissed from Litigation
Feb 16, 2015
Obtained a stipulation of dismissal for a tour operator specializing in tours to Costa Rica in a personal injury matter in the Eastern District of Pennsylvania. The plaintiffs alleged numerous physical injuries, including a skull fracture to one...

Areas of Practice (5)

  • Professional Liability
  • Construction Injury Litigation
  • Construction Defects
  • Product Liability
  • Municipal Liability

Education & Credentials

Contact Information:
(610) 354-8271  Phone
(610) 354-8299  Fax
University Attended:
Dickinson College, B.A., magna cum laude, International Studies / History, 1998
Law School Attended:
Boston College Law School, Newton, Massachusetts, J.D., 2002; Honors: Sigma Iota Rho, National Honor Society for International Studies
Year of First Admission:
2003, U.S. District Court Eastern District of Pennsylvania; 2003, Pennsylvania; 2003, New Jersey; 2002, Massachusetts

Associations & Memberships

•Pennsylvania Bar Association
•Philadelphia Bar Association
•Board Member, Saint Mary Interparochial School

Reported Cases:
Significant Representative Matters: Successfully drafted and argued Motion for Judgment on the Pleadings on behalf of international tour operator in a federal court case in which plaintiff (a 35 year old man) drowned while on a fishing excursion near the coast of Costa Rica. (The fishing excursion was booked through the tour operator). The underlying motion was predicated on applicable tour operator liability law, maritime law, and the Death on the High Seas Act.; Successfully drafted Motion to Dismiss on jurisdictional grounds on behalf of internationally renowned California golf resort that was sued by plaintiff for severe head and cognitive injuries.; Obtained voluntary dismissal of all claims as to tour operator sued by plaintiff for personal injuries as a result of alleged injuries stemming from an accident in a resort in Jamaica.; Obtained voluntary dismissal of all breach of contract claims as to local non-profit financial institution in a breach of contract civil action involving close to $1 million in disputed monies.; Obtained numerous defense verdicts as lead trial counsel on behalf of clients in federal court in which plaintiff alleged false arrest, excessive force, and other civil rights violations.; Obtained multiple summary judgments on behalf of clients in general casualty and products liability matters.; Published Works: When Accidents Happen: Legal Defenses for Travel Advisors, Travel Advisor, February 2019; Top Legal Considerations for Independent Contractors, Travel Agent magazine, September 2014; The Motor Vehicle Black Box, Dispute Resolution Institute: Annual Personal Injury Potpourri 2007, Co-Authored with Ralph P. Bocchino, Esq.

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Philadelphia, Pennsylvania

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