Dan is chair of the Environmental & Toxic Tort Practice and is responsible for the oversight of a group of attorneys who focus on toxic tort litigation. He also supervises the representation of many defendants in asbestos litigation throughout Pennsylvania. Dan also concentrates a portion of his practice to defending insurers in bad faith litigation.
In addition to close to 30 years of trial experience in toxic tort litigation on behalf of asbestos manufacturers, Dan has also developed an extensive involvement in lead paint litigation on behalf of building owners and has also tried auto, premises, exercise equipment and various other product liability claims, representing manufacturers and insurers. As an alternative to litigating matters, Dan has extensive participation in various types of mediation and alternative dispute resolution.
Adding to his law practice, Dan has given lectures and seminars concerning the defense in mass tort litigation with particular emphasis on alternative, cost effective ways for processing large volumes of cases. He has also lectured on the defense of bad faith cases for the Insurance Society of Philadelphia's Continuing Legal Education program as well as to the staffs of insurers.
Honors & Awards
•AV Preeminent by Martindale-Hubbell
•The Best Lawyers in America, Philadelphia, 'Lawyer of the Year' - Personal Injury Litigation - Defendants (2021)
•The Best Lawyers in America, Personal Injury Litigation - Defendants (2009-2026)
•Pennsylvania Super Lawyers (2006, 2009-2026)
Classes/Seminars Taught
•Handling UM/UIM Cases in Pennsylvania, Marshall Dennehey Client Webinar, May, 2021
•Annual presentations to various clients groups regarding the status of asbestos litigation in Pennsylvania involving strategies for defending various types of products such as brakes, tile, caulk, joint compound, boilers, wire, pumps and packing.
•Presented several in-house presentations to various insurers as to how to avoid bad faith litigation in Pennsylvania while handling first party claims.
Published Works
•'What’s New In 2017? Filing Trends and Developments In Asbestos Litigation,' Mealey's Litigation Reports, August 16, 2017
•'Sunlight is the Best Disinfectant; Solutions to the Concealment of Asbestos Trust Filings in Tort Litigation,' For the Defense, April 2016
•'Uncloaking Bankruptcy Trust Filings In Asbestos Litigation: Refuting the Myths About Transparency,' Mealey's Asbestos Bankruptcy Report and Mealey's Litigation Report Asbestos, April 2016
•'Uncloaking Bankruptcy Trust Filings In Asbestos Litigation: A Survey Of Solutions To The Types Of Conduct Exposed In Garlock's Bankruptcy,' Mealey's Asbestos Bankrupcty Report, August 28, 2015
•'Is Mold The Next Gold For The Plaintiffs' Bar?,' Defense Digest, Vol. 8, No. 1, March 2002
•''Market-Share' Liability Is Rejected In Lead Paint Case in Pennsylvania,' Defense Digest, Vol. 2, No. 1, January 1996
•'Applying Lessons Learned From the Asbestos Litigation to the Next Mass Tort (Repetitive Stress),' Defense Digest, January 1995
•'Pennsylvania Superior Court Finally Clarifies What is Bad Faith Conduct Under Section 8371,' Defense Digest, Winter 1994
News
Marshall Dennehey Announces 2026 Pennsylvania Super Lawyers and Rising Stars Honorees
May 22, 2026
Marshall Dennehey Secures Four Finalist Honors in the 2026 Pennsylvania Legal Awards
April 15, 2026