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Sharon Armstrong

Judge Sharon Armstrong (Ret.)

Case Manager
Michele Wilson
T: 206-292-0457
F: 206-292-9082
1420 Fifth Ave., Suite 1650, Seattle, WA 98101


Available to conduct virtual/remote mediations, arbitrations and other ADR proceedings on a variety of online platforms, including Zoom.

Judge Sharon Armstrong (Ret.)
joined JAMS after 27 years as a judge on the King County Superior Court.  Prior to serving as a judge, she practiced law at Garvey, Schubert & Barer, where her practice emphasized complex civil litigation, and prior to that she was a trial attorney for the Federal Trade Commission handling trade regulation litigation. Judge Armstrong has tried a wide range of cases, and was especially known for handling complex disputes. Her experience includes business cases, class actions, employment, environmental, insurance, securities and financial markets cases.

Judge Armstrong is lauded by the legal community for being intelligent, incisive, engaged, and prepared.  Lawyers say she is efficient and at the same time very effective and fair, and has a great deal of patience and respect for all parties.  Her demeanor, skills and vast experience lend themselves to her being a very effective and fair neutral for all types of cases.

ADR Experience and Qualifications

  • Twenty seven years of experience serving as a judge on the King County Superior Court
  • Nearly 40 years of legal experience, including many years as a trial lawyer
  • Continually recognized as being an outstanding judge, with excellent skills and knowledge
  • Many years of experience in presiding over complex matters utilizing her depth of analytical skills
  • Has handled over 50 arbitrations

Representative Matters and Experience

Judge Armstrong has handled the following matters:

Antitrust/Trade Practices

  • Unfair practices consumer class actions, individual Consumer Protection Act cases
  • Antitrust matters concerning manufacturing, transportation, and natural resource companies


  • Partnership dissolution
  • Shareholder derivative actions
  • Franchise Act termination litigation
  • Commercial borrower/bank disputes
  • Business buy/sell cases
  • Commercial lease disputes
  • Religious organization governance dispute
  • Distribution agreement disputes in telecommunications and cosmetics industries
  • LLC disputes in various industries concerning breach of contribution agreements, conversion, fraud, breach of fiduciary duties, wrongful forfeiture/termination of membership interest, valuation of member interest

Class Action/Mass Torts

  • Unfair practices consumer class actions
  • Class action claims involving sex discrimination
  • Wage and hour class actions
  • Medical provider class action for insurance reimbursement
  • Securities fraud class actions

Construction Defect

  • Condominium defect claims
  • Toxic mold cases
  • Design and project management services claims


  • Sexual harassment and retaliation claims
  • Individual and class action claims involving race, age, sex and disability discrimination
  • Wage and hour class actions
  • Non-competition clause disputes
  • Wrongful termination
  • Wage and commission claims, post-termination payments
  • Whistleblower claims

Environmental/Natural Resources

  • Toxic clean-up cases
  • Regulatory appeals and LUPA actions involving SEPA, Shorelines Management Act, Growth Management Act, and Endangered Species Act
  • Timberland brokerage contract dispute
  • Dispute concerning transfer of contaminated real property


  • Medical provider class action for insurance reimbursement
  • $200 million reinsurance dispute claim
  • Business and auto coverage cases
  • Insurance fraud case

Intellectual Property

  • Copyright infringement
  • Trade Secret violations

Personal Injury/Torts

  • For five years, managed King County Superior Court’s large asbestos caseload
  • Handled cases involving mesothelioma, medical malpractice, wrongful death, catastrophic workplace injury, government caseworker malfeasance, civil rights, and motor vehicle injury
  • Represented Weyerhaeuser Company in formaldehyde litigation
  • Title IX violations

Professional Liability

  • Legal malpractice litigation
  • Dental, medical, and pharmacy malpractice
  • Architectural and accounting malpractice
  • Medical malpractice, wrongful death
  • Nursing home negligence

Real Estate

  • Dispute between owners of real property and railroad company over damages to property
  • Water trespass
  • Adverse possession
  • Boundary disputes
  • Landlord/tenant commercial lease disputes

Securities/Financial Markets

  • Securities fraud class actions
  • As practitioner, experienced in broker-dealer litigation

Representative Discovery Master Assignments

  • Seattle Tunnel Litigation, King and Thurston Counties
  • Homeowner Association property use and governance disputes
  • Insurance coverage dispute
  • Negligence claim against state entity
  • "Outstanding Judge" Award, Washington State Bar Association, 2013
  • William L. Dwyer Outstanding Jurist” Award, King County Bar Association, 2013
  • Distinguished Alumna, Washington Law Review, 2002
  • Named Outstanding Judge, King County Bar Association, 2001
  • Named Outstanding Jurist of the Year, American Board of Trial Advocates (Washington Chapter), 1998
  • Member, King County Public Defense Advisory Board, 2014 to present
  • Trustee, King County Bar Association 2014-2016
  • Member, King County Superior Court’s Executive Committee, 17 years
  • Co-chair, Washington Pattern Instruction Committee, 2000-2012; member, 1995-2000
  • Instructor, Washington Judicial College
  • President, Secretary, American Judicature Society, Washington Chapter, 2005-2009
  • Judge, King County Superior Court, WA, 1985-2012
    • Chief Criminal Judge, 2009-2010
    • Chief Asbestos Judge 2002-2007
    • Chief Civil Judge, 1996
  • Judge pro tem of the Washington Court of Appeals
  • Principal, Associate, Garvey, Schubert & Barer, 1979-1985
  • Trial lawyer, Federal Trade Commission, 1974-1979
  • J.D., University of Washington School of Law, 1974
  • M.A., Education, Catholic University of America, 1970
  • B.A., English, Stanford University, 1969

Counsel Comments

    • “Judge Armstrong is a person of unquestionable integrity… Her deep intellect and incisive analytical powers enable her to quickly master even the most complex cases.” 

      - King County Superior Court Judge 
    • “She is one of the very best judges.” 

      - WA State Attorney



Practice Areas

  • Antitrust
  • Arbitration
  • Business/Commercial
  • Class Action/Mass Tort
  • Construction Defect
  • Employment
  • Environmental
  • Governmental/Public Agency
  • Insurance
  • Personal Injury/Torts
  • Professional Liability
  • Real Property
  • Securities
Available nationwide


This page is for general information purposes.  JAMS makes no representations or warranties regarding its accuracy or completeness.  Interested persons should conduct their own research regarding information on this website before deciding to use JAMS, including investigation and research of JAMS neutrals. See More