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Marshall DenneheyShare Holder
Michael L. Detweiler
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Michael L. Detweiler

Not yet reviewed

2000 Market Street, Suite 2300, Philadelphia, PA 19103

Miscellaneous Professional Liability, Construction Injury Litigation, Architectural, Engineering and Construction Defect Litigation and 4 more

About Michael L. Detweiler

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 homeowners associations (HOAs), planned communities, residential real estate agents and brokers, residential leasing agents, residential property managers, commercial real estate agents and brokers, commercial leasing agents, commercial property managers, 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. Michael has successfully navigated complicated homeowners' association and planned community association disputes concerning property and related assessment disputes by successfully brokering compromises and settlement agreements between the defendant-communities and unit owners in order to achieve cost-effective results for communities and carriers and has successfully defended these matters at trial when necessary.

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 and New Jersey.

Honors & awards

The Best Lawyers in America, Construction Law
2026

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

Year joined

2005

Results

Successful Trial Result Achieved in a Philadelphia Premises Liability Matter

Premises & Retail Liability
July 11, 2025

We received a successful trial result in a premises liability matter in Philadelphia Court of Common Pleas. The plaintiff’s expert projected future surgeries and extensive life-long medical care costs of $1.25 million. Much of our defense centered on damages and demonstrating that the projected future medical care was not supported by the actual medical treatment provided. Additionally, video of the incident was used to demonstrate that the plaintiff had actual/constructive knowledge of spilled water in the premises but proceeded to walk in that area anyway.

Real estate agency dismissed from litigation.

Real Estate E&O Liability
July 25, 2019

The defense prevailed on a motion to dismiss our real estate agency client. The plaintiff filed counts of fraud, deceit, misrepresentation, conspiracy, conversion, invasion of privacy-false light, breach of contract, and promissory estoppel against the agency regarding an allegedly fraudulent transfer of a private residence by the co-defendant seller of the property. We filed preliminary objections, arguing that the plaintiff's claims lacked sufficient specificity and that the plaintiff failed to state a claim upon which relief may be granted.

Thought Leadership

On the Pulse...King of Prussia Office: A Historic Legacy and a Dynamic Future of Legal Excellence

King of Prussia
December 1, 2025
Situated in the shadow of Valley Forge and the rich history of the Revolutionary War, the King of Prussia, Pennsylvania, office is steeped in history.

98 Marshall Dennehey Attorneys Recognized in the 2026 Editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America

August 20, 2025
Marshall Dennehey is proud to highlight the firm’s 98 attorneys who have been recognized in the 2026 editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America. Less than 6% of all practicing lawyers in the U.S.

When Accidents Happen: Legal Defense for Travel Advisors

Philadelphia - Headquarters
Miscellaneous Professional Liability
February 1, 2019

Classes/Seminars Taught

An Overview of Auto Law in Pennsylvania, Marshall Dennehey Client Webinar, July 22, 2025

Travel Advisors E&O Insurance: Lessons in Liability - Panelist, Travel Professional News webinar, September 12, 2023

PHL Airport First Responders Training, Philadelphia International Airport, Philadelphia, PA, March 30, 2023

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

 

Michael L. Detweiler (Philadelphia, Pennsylvania) View website

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Services

Areas of Law

  • Other 7
    • Miscellaneous Professional Liability
    • Construction Injury Litigation
    • Architectural, Engineering and Construction Defect Litigation
    • Product Liability
    • Public Entity and Civil Rights Litigation
    • Non-Profit D&O
    • Real Estate E&O Liability

Practice Details

  • Firm Information
    Position
    Shareholder
    Firm Name
    Marshall Dennehey
  • Representative Cases & Transactions
    Cases
    Significant Representative Matters: Successfully drafted
    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,
    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
    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,
    other civil rights violations.
    Obtained multiple summary judgments on behalf of clients in general casualty
    products liability matters.
    Published Works: Movement No Longer Required: Expansion of the Operation of Motor Vehicle Exception in Municipal Cases Since Balentine, Defense Digest, Vol. 25, No. 2, June 2019
    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.

Experience

  • Bar Admission & Memberships
    Admissions
    2002, Massachusetts
    2003, New Jersey
    2003, Pennsylvania
    2003, U.S. District Court Eastern District of Pennsylvania
    Memberships

    Associations & Memberships

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

  • Education & Certifications
    Law School
    Boston College Law School, Newton, Massachusetts
    Class of 2002
    J.D.
    Other Education
    Dickinson College
    Class of 1998
    B.A.
    magna cum laude, International Studies / History

    Honors: Sigma Iota Rho, National Honor Society for International Studies

Contact Michael L. Detweiler

Share Holder at Marshall Dennehey
Not yet reviewed

2000 Market Street, Suite 2300Philadelphia, PA 19103U.S.A.

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Fax: (610) 354-8299

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Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    Michael L. Detweiler was admitted in 2002 to the State of Massachusetts.
  • Is this attorney admitted to the bar in more than one state?
    Yes, Michael L. Detweiler is admitted to practice in Massachusetts, New Jersey and Pennsylvania.
  • Is this attorney admitted to practice in any U.S. Federal Courts?
    Michael L. Detweiler is admitted to practice before the United States District Court for the Eastern District of Pennsylvania.
  • What law school did this attorney attend?
    Michael L. Detweiler attended Boston College Law School, Newton, Massachusetts.
  • What year was this attorney's law firm established?
    Marshall Dennehey was established in 1962.

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