Wilhelm Dingler: Lawyer with Marshall Dennehey Warner Coleman & Goggin, P.C.

Wilhelm Dingler

Wilhelm Dingler is a shareholder with Marshall, Dennehey, Warner, Coleman & Goggin. His practice is devoted largely to the defense of professionals, primarily accountants, attorneys, and real estate professionals.
Phone(215) 575-2682

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Experience & Credentials Ratings & Reviews

Practice Areas

  • Professional Liability
    University University of Notre Dame, Notre Dame, Indiana, B.A., American Studies, Modern Languages, 1980; First Place, National Appellate Advocacy Moot Court Competition; Order of the Barristers
    Law SchoolUniversity of Toledo College of Law, Toledo, Ohio, J.D., cum laude, 1983
    Admitted1983, Washington; 1983, U.S. District Court Western District of Washington; 1984, U.S. District Court Eastern District of Washington; 1990, U.S. Court of Appeals 9th Circuit; 2014, U.S. District Court Middle District of Pennsylvania; 2005, U.S. District Court Eastern District of Pennsylvania; 2008, U.S. Tax Court; 2008, U.S. Court of Appeals 3rd Circuit; 2005, Pennsylvania

    Associations & Memberships

    •Order of the Barrister
    •Professional Liability Underwriting Society (PLUS)
    •Washington State Bar Association, Committee of Law Examiners


    Wilhelm devotes his practice to the defense of professionals, primarily accountants, attorneys and real estate professionals. He also provides risk management services and advice to CPAs across the country on a hotline under contract with a national insurance carrier.

    A trial attorney for over 25 years, Wilhelm has litigated hundreds of cases in state and federal courts in Pennsylvania, Washington, Virginia, Alaska and Oregon. He has provided legal counsel to thousands of professionals. Prior to his engagement in the private practice of law, Wilhelm served as an assistant attorney general for the State of Washington providing counsel to the state's industrial insurance agency. During his tenure, he was prosecutor for the Medical Disciplinary Board. He left for private practice where he focused on asbestos litigation, medical malpractice and securities litigation. The state of Washington contracted with Wilhelm's new firm to have him appointed as special assistant attorney general prosecutor for the Medical Disciplinary Board-a contractual relationship which lasted an additional three years following his departure from state employ.

    Wilhelm graduated from The University of Notre Dame in 1980 with a Bachelor of Arts and the University of Toledo, College of Law, with his juris doctor, cum laude, in 1983. Prior to joining Marshall Dennehey, Wilhelm was senior vice president of West Coast Operations for C. R. Vince & Associates, Inc., heading the firm's Seattle office. There he focused on professional liability claims, coverage issues, and risk management for accountants, architects and engineers. He also responded to callers on the Accountant's Professional Liability Advice Line, assisting accountants with risk management in their day-to-day practice - a service he continues to provide at Marshall Dennehey.

    When not practicing law, Wilhelm runs in local and regional races raising funds for the benefit of the American Cancer Society and the American Heart Association. He is a member of the Friends of Schuylkill River Park and volunteers for clean-up efforts sponsored by the Fairmount Park Association.

    Honors & Awards

    •BV Distinguished by LexisNexis Martindale-Hubbell

    Year Joined Organization


    Classes/Seminars Taught

    Perception vs. Reality of Engagement Letters, Wisconsin Institute of Certified Public Accountants Annual Conference, November 2015

    What's New for Accountants and Lawyers PLI?, PLUS International Conference, November 6, 2014

    Buying & Selling Accounting, Law and Other Non-Medical Professional Practices, Montgomery County Bar Association, October 29, 2014

    Ethical Considerations When Dealing With Distressed Property, National Business Institute, Philadelphia, PA, August 2014

    Risk Management and Loss Prevention for Accountants, Kansas City and Kansas Institutes of CPAs, July 2014

    Accountant's Professional Liability, Travelers Insurance Co., November 2013

    Handling the Accountant Embezzlement Claim - A Case Study, Institute of CPAs Joint Committee on Cooperation With the Bar and Other Professionals, March 2013; Travelers Insurance Co., November 2013

    Forensic Reports: the Federal and State Rules of Evidence - Kovel Letters, Pennsylvania Institute of CPAs Forensic and Litigation Divorce Conference, October 2013

    I Think My Bookkeeper Is Stealing From Me, Panel Presenter - PICPA Cooperates With the Bar and Other Professionals, Philadelphia, Pennsylvania, June 2013

    Multi-Disciplinary Approach to Accountants Professional Liability Claims Handling, Litigation and Underwriting, GenStar (a Berkshire Hathaway Company) and Markel Corp. Midwest Region, March 2013

    Accountants Professional Liability - Claims Training and Current Issues Discussion, GenStar and Markel/AllRisks, Chicago, Illinois, March 2013

    Advanced Issues in Foreclosure, Live CLE, Philadelphia, July 2011

    Maintaining Professionalism in the Legal Practice, National Business Institute Webinar, June 2011

    Tax Consequences of Foreclosure, National Business Institute, national webinar, also available as a podcast through West Publishing, January 2011 and June 2011

    Risk Management and Insurance Coverage - Practical Lessons from the Trenches, Annual Meeting of the Philadelphia Chapter of the Pennsylvania Society of Public Accountants, May 2011

    Risky Business: Risk Management Techniques for Accounting Firms, ArgoPro, Insight Services Inc., Contract Solutions Group Webinar, October 2010

    Accountants' Liability Claims Perspective and Risk Management, National Webinar for ArgoPro/Insight Insurance Services, October 2010

    Agents and Brokers - A Better Understanding of Legal Developments and Risk Assessment, Liberty Mutual Agency Underwriters and Claims, Seattle, Washington, September 2010

    Do's and Don'ts of Engagement Letters in IRS Tax Representation, Winning Strategies LLC, November 2009

    New Auditing Standards, IRS Regulations, the Turmoil in the American Automotive Market and How Each May Impact Claims, Litigation and Risk Management, Annual Meeting of the National Alliance of Auto Dealer Advisors (NAADA), St. Louis, Missouri, June 2009

    Case Trends, Risk Management and Issues Effecting Underwriting and Claims Against Accountants and Attorneys, New York City, June 2009

    A Comprehensive Guide To Claims Administration, Mutual Marine, New York, New York, Spring 2009

    New Auditing Standards for Non-Public Companies/Liability and Risk Management Issues, Morris J. Cohen & Co., P.C., Philadelphia, Pennsylvania, 2007

    New Auditing Standards Recently Promulgated by the AICPA and Their Effects on Claims Trends and Underwriting, Everest National Insurance Company, April 4, 2007

    Claims Trends and Risk Management Techniques For Professional Liability Attorneys, Claims Handlers And Underwriters, Crittenden Specialty Coverages Conference, Las Vegas, October 2004

    PLUS Mid-Year Miscellaneous E&O Symposium, PLUS, Philadelphia, May 2004

    Past Employment Positions

    •C.R. Vince & Associate, Inc., Senior Vice-President for West Coast Operations, 2002 - 2005

    SAFECO Insurance Company, 1995 - 2002

    Assistant Attorney General, Washington State, 1983 - 1990

    Reported CasesSignificant Representative Matters: Engaged by a prominent national insurer to represent a group of Texas accountants in a multi-million dollar lawsuit venued in the United States District Court for the Eastern District of Virginia, at Norfolk. Successfully resolved the matter within the limited amount of coverage available and was able to insulate clients from substantial excess verdict exposure.; Acted as co-counsel in an adversary proceeding in the United States Bankruptcy Court for the Eastern District of Pennsylvania. Was instrumental in securing a complete defense verdict on behalf of a Philadelphia law firm after a bench trial, which consumed 20 days over the better part of four months.; Wilhelm won the first case he ever took to trial. He was representing the defendant, the State of Washington and Bellingham County. The plaintiff appealed to the intermediate appellate court. The appellate court ruled 2-1 in the plaintiffs favor. Wilhelm appealed to the Washington Supreme Court and convinced the justices to rule 9-0 in favor of his clients. Published Works: Another Arrow in the Defense Quiver, Agents of America, E&O Weekly Prevention, October 4, 2012; The IRS, QuickBooks and You, Of Mutual Interest, July 2012; Remember Risk Management With Adoption of New Work Paradigms, Pennsylvania CPA Journal, Vol. 80, No. 1, p. 16, Spring, 2009; In Bad Economy, Protect Yourself from Portfolio Collapse Lawsuits, Pennsylvania CPA Journal, Vol. 79, No. 3, p. 14, Fall, 2008; Top Ten Trouble Spots: Will We Ever Learn?, Pennsylvania CPA Journal, Vol. 78, No. 4, Winter 2008, pp. 12-13; Confronting the Inevitable Blame Game, Pennsylvania CPA Journal, Vol 79, No. 2, Summer 2008, p. 14; Mind the Gap in Liability Coverage, Pennsylvania CPA Journal, Volume 77, No. 4, Winter, 2007; Never Slack on Security, Pennsylvania CPA Journal, Volume 77, No. 3, Fall, 2006; The Benefits of Advice: One Step to a Better Night's Sleep, The Asset Column, Winter, 2000; Experience Begets Advice, The Asset Column, Vol. 6, No. 3, 1999; Fact and Fiction of Mediation and the Accountant: A Case Study, Pennsylvania CPA Journal, Vol. 68, No. 4, Winter, 1998; Claims Made and Reported: A View from the Top, The Asset Column, Vol. 4, No. 3, 1997

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    Office Information

    Wilhelm Dingler

    2000 Market Street, Suite 2300
    PhiladelphiaPA 19103


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