Diane J. Kero, Partner
  • Diane joined GTH in 1988 after working in private practice for seven years. She received her JD from the University of  Washington School of Law after attending Alliance Française in Paris and Leningrad University in the USSR. Her primary areas of practice include product liability litigation with an emphasis on toxic chemicals, commercial litigation, and general business. For many years, Diane led a successful trial team that won defense verdicts and favorable settlements in asbestos cases filed in Washington, Oregon and Alaska. She has represented most of her clients for more than two decades. Before becoming an attorney, Diane taught secondary school for nine years. She remains an advocate for education and has served on the advisory board of the Rotary Educational Assistance program and on the executive board of King County Boys and Girls Clubs.

  • Education

    • J.D., University of Washington School of Law, 1981
    • Alliance Française, Paris France, 1973
    • Leningrad State University, U.S.S.R., 1968
    • B.A., University of Washington, 1968

    Jurisdictions Admitted to Practice

    • Washington State Courts
    • Oregon State Courts
    • U.S. District Court, Western District of Washington
    • U.S. District Court, Eastern District of Washington

    Professional & Bar Association Memberships

    • Washington State Bar Association

      • Member, Juvenile Law Section
    • American Bar Association

    • Defense Research Institute

    • Washington Women Lawyers Washington

    • Defense Trial Lawyers Association

    • King County Bar Association

    Professional History

    • Joined firm in 1988
    • Private Practice, 1981-88
    • Secondary School Teacher, Seattle, 1969-70, 1973-78, White River Junction, Vermont, 1970-72

    Honors & Awards

    • AV Preeminent Rated by Martindale Hubbell
    • Selected as a Washington Super Lawyer, 2015-2018
  • Reflection pond by the Tacoma Glass Museum
  • Duwamish Waterway and brown field cleanup
  • Fireboats on the Seattle Waterfront
  • Tacoma Arches at the History Museum
  • Pioneer Square
Gordon Thomas Honeywell LLP


1201 Pacific Ave, #2100
Tacoma, WA 98402

Telephone: 253.620.6500
Fax: 253.620.6565


One Union Square
600 University St, #2100
Seattle, WA 98101

Telephone: 206.676.7500
Fax: 206.676.7575

Visit the Gordon Thomas Honeywell Governmental Affairs Web Site


1201 Pacific Ave, #2100, Tacoma, WA 98402
Telephone: 253.620.6500  Fax: 253.620.6565


One Union Square, 600 University St, #2100, Seattle, WA 98101
Telephone: 206.676.7500  Fax: 206.676.7575