Thomas W. Williams headshot
Thomas W. Williams
  • Partner


Download v-card


Tom concentrates his practice in energy and public utility law. He has over 40 years of experience in Hawai‘i Public Utility Commission (PUC) regulatory and rate proceedings for electric utilities, telephone companies, motor carriers, water carriers and water and sewer companies. He also has experience in representing business clients in contested case proceedings before other administrative agencies.

Tom has been included in Best Lawyers in America for over 20 years, and was named Lawyer of the Year in Honolulu for Energy Law in 2012 and 2016. He has been awarded an AV PreeminentTM Rating (highest level of professional excellence) by Martindale-Hubbell®.


Tom and his wife Anne love to travel and explore the world's archeological, cultural and natural treasures. They also like to hit the road to spend time with the grandkids, too.


  • University of Virginia School of Law, Charlottesville, Virginia
    • J.D. - 1975
    • Honors: Member, Order of the Coif
  • University of Virginia, Charlottesville, Virginia
    • B.S. - 1969
    • Honors: Echols Scholar
    • Honors: Phi Eta Sigma
    • Major: Physics

Bar Admissions

  • Hawaii, 1975
  • U.S. Court of Appeals 9th Circuit
  • U.S. District Court District of Hawaii

Professional Associations

  • Hawaii State Bar Association, Member
  • American Bar Association, Member,, Sections of Business, Labor and Employment, and Public Utility Law

Representative Cases

  • Re Hawaiian Electric Company, Inc, 1992 WL 205348, 1992, Hawai'i P.U.C., 1992151579
  • In re Hawaiian Elec. Co., Inc., 1994 WL 202275, 1994, Hawai'i P.U.C., 1994116506
  • Re Hawaiian Electric Co., Inc., 1989 WL 418528, 1989, Hawai'i, 1990050882
  • Re Integrated Resource Planning, 1992 WL 207196, 1992, Hawai'i P.U.C., 1992152616
  • In re Nonpension Postretirement Benefits, 1994 WL 759329, 1994, Hawai'i P.U.C., 1995049342
  • Application of Hawaiian Elec. Co., Inc., 698 P.2d 304, 1985, Hawai'i App., 1985120475
  • Hawaii PUC V. Hawaiian Tel Co., 587 P.2d 827, 1987, 9th Circuit

Practice Areas:

  • Energy, Public Utilities and Telecommunications


  • Phi Eta Sigma
  • AV Rated, Martindale-Hubbell
  • Best Lawyers in America, Lawyer of the Year in Honolulu, 2012, 2016, 2019
  • The Best Lawyers in America, 2020

Pro-Bono Activities

  • Honolulu Community Theatre

Past Positions

  • United States Army, First Lieutenant, 00/1969 to 00/1972