Sean P. Greenwalt

Associate

    Sean is an associate in the firm’s Casualty Department where he focuses his practice on amusement, sports, and recreation matters as well as fraud and personal injury protection disputes. Sean litigates a variety of complex matters on behalf of corporations involving premises liability, commercial auto liability, catastrophic loss, wrongful death and commercial contract disputes. He also has experience defending first-party auto coverage suits and conducting examinations under oath.

    Sean is a member of the Florida Defense Lawyers Association and Claims Litigation Management Alliance. He routinely writes articles and presents on legal developments in the insurance industry, and has also been published in Insurance Journal. Sean also volunteers as a Guardian ad Litem child advocate in Hillsborough County.

    Prior to joining Marshall Dennehey, Sean worked as outside counsel for a national automobile insurance company and previously worked as in-house counsel for a national automobile insurance company. Before working in civil litigation, Sean was an attorney for Florida's Department of Children and Families, where he successfully litigated countless legal issues and obtained numerous successful bench trial verdicts that protected the vulnerable and allowed children to become adopted.

    Sean earned his juris doctor and graduated magna cum laude from Ave Maria School of Law in Naples, Florida. During law school, Sean served as an Associate Editor on Law Review and a member of the Moot Court Board. He also was a Judicial Intern for the Honorable Judge Douglas Frazier of the US District Court, Middle District of Florida. Sean obtained his Bachelor of Arts degree from Old Dominion University where he was inducted into the honor society for Communication majors, Lambda Pi Eta.

    Classes / Seminars Taught

    A Proposal for Settlement for All Seasons: Effective Use of the PFS in Florida’s New Legal Landscape, Florida Liability Claims Conference, Lake Buena Visit, FL, June 18, 2025

    First Party Auto (PIP) and Property Year in Review Preview, The Institutes CPCU Society - Central Florida Chapter, November 14, 2024

    Published Works

    “A Warning on Wording: Appellate Court Reverses Summary Judgment Ruling for Insurer After Finding Condition Precedent Affirmative Defense Too Narrowly Pled,” Defense Digest, Vol. 29, No. 3, September 2023

    Admissions
    Florida
    2016
    U.S. District Court Middle District of Florida
    2023
    Education
    Ave Maria School of Law (J.D., magna cum laude, 2016)
    Old Dominion University (B.A, 2012)
    Associations & memberships
    Florida Bar Association
    Florida Defense Lawyers Association
    Claims & Litigation Management Alliance (CLM) Western Florida Chapter
    Asian Pacific American Bar Association of Tampa Bay (APABA-TB)
    Year joined
    2021
    Pro Bono

    Guardian ad Litem, Hillsborough County