Gregory A. Harrison

Of Counsel

A member of the firm’s Board of Directors, Greg is a proven litigator. First as a trial attorney with the United States Department of Justice, Commercial Litigation Branch (1985 – 1989) and since joining the firm in 1989, he has been extensively involved in the litigation of complex commercial litigation. His practice includes litigation of antitrust, insurance coverage, product liability, trade secret and other financial disputes. Having handled cases in more than 25 states, he serves as national coordinating counsel in insurance coverage and product liability matters. He also has significant experience with electronic discovery, computer technology and litigation management and support.

First exposed to the insurance industry through working at his family’s independent insurance agency in his hometown of Wapakoneta, Ohio, Greg has litigated and counseled on all manner of insurance issues including insurance regulation, coverage, bad faith, and liquidation. He has been listed in The Best Lawyers in America since 2006 and AM Best’s Recommended Insurance Attorneys since 2007.

Credentials

Education

University of Dayton School of Law (J.D., magna cum laude, 1985)

  • University of Dayton Law Review, editor-in-chief (1984 – 1985)
  • Dean's Award for Legal-Writing Excellence (1984)

Bowling Green State University (B.S., 1982)

  • Business Administration

Bar admissions

  • Ohio

Court admissions

  • U.S. Supreme Court
  • U.S. Court of Federal Claims
  • U.S. Court of Appeals for the Fourth Circuit
  • U.S. Court of Appeals for the Sixth Circuit
  • U.S. District Court for the Northern District of Ohio
  • U.S. District Court for the Southern District of Ohio

Affiliations and memberships

  • American Bar Association
  • Ohio State Bar Association
  • Cincinnati Bar Association, Grievance Committee
  • Defense Research Institute
  • Ohio Association of Civil Trial Attorneys
  • University of Dayton School of Law Dean’s Advisory Council

Distinctions

  • Peer Review Rated AV in Martindale-Hubbell
  • Best Lawyers®
    • “Lawyer of the Year” in Cincinnati for Insurance Law (2012)
    • “Lawyer of the Year” in Cincinnati for Litigation – Insurance (2020)
    • Commercial Litigation, Insurance Law, Litigation – Insurance (2021-2024)
  • Ohio Super Lawyers®
    • For Insurance Coverage (2021)
  • AM Best’s Recommended Insurance Attorneys (2007- present)

News
  • December 17, 2025

    30 Dinsmore Attorneys Named 2026 Ohio Super Lawyers and Rising Stars

  • December 17, 2024

    35 Dinsmore Attorneys Named 2025 Ohio Super Lawyers and Rising Stars

  • December 29, 2023

    Ohio Super Lawyers Recognizes 30 Dinsmore Attorneys on 2024 List

  • August 17, 2023

    200+ Dinsmore Attorneys Named 2024 Best Lawyers®, “Ones to Watch”

  • December 29, 2022

    Ohio Super Lawyers Honors 36 Dinsmore Attorneys

  • August 18, 2022

    2023 Best Lawyers® List Recognizes 190 Dinsmore & Shohl Attorneys

  • December 30, 2021

    44 Dinsmore Attorneys Named Ohio Super Lawyers and Rising Stars

  • August 19, 2021

    Best Lawyers® Recognizes 191 Dinsmore & Shohl Attorneys

  • December 8, 2020

    44 Dinsmore Attorneys Named Ohio Super Lawyers and Rising Stars

  • August 20, 2020

    Best Lawyers® Recognizes 180 Dinsmore & Shohl Attorneys