Margo Keller, Esquire

Washington Arbitration & Mediation Services (WAMS)
600 University Street
Suite 900
Seattle, WA 98101

Phone: 206-467-0793
Other URL

Now a full-time neutral, Margo Keller handles tough cases while effectively assisting parties and attorneys in preserving
ongoing relationships. Formerly a partner in the Seattle firm of Lasher, Holzapfel, Sperry & Ebberson, she has extensive
trial experience representing plaintiffs and defendants in a broad range of civil matters. Ms. Keller has litigated claims
involving breach of contract, business sales, partnership dissolution, employment, homeowner associations, real property,
securities transactions, TEDRA, domestic relations and personal injuries. She argued a breakthrough case before the
Washington Supreme Court that set the standards for fiduciary duty and management of partnerships in the state. She
prevailed against the IRS at the Ninth Circuit in a case of first impression involving the tax treatment of a stock redemption in a marital dissolution. She was appointed by the US Bankruptcy Court (Eastern District) to manage and resolve claims by more than 100 investors in businesses operated throughout the state.

Types of Cases Mediated

  • Americans w/Disabilities Act
  • Banking
  • Business
  • Civil (general)
  • Commercial
  • Construction
  • Contracts
  • Discrimination
  • Education
  • Employment
  • General Mediation
  • Harassment
  • Health Care
  • Insurance
  • Medical Malpractice
  • Organizational
  • Partnership Dissolutions
  • Personal Injury
  • Probate
  • Professional Malpractice
  • Real Estate
  • Special Education
  • Tax
  • Torts
  • Workplace

MEMBER: 2019



Margo Keller is also admitted to practice in the US District Courts in Washington (Western and Eastern), the Ninth Circuit Court of Appeals and US Tax Court. She has qualified as an expert witness in legal malpra ctice matters relating to conflicts of interest in estate and business representation. She also serves an adjunct professor of Dispute Resolution at the Seattle University School of Law and is a frequent speaker on negotiati on and settlement strategies at CLE and other seminars.

As a neutral, Ms. Keller has mediated cases involving a wide rang e of issues, from personal injury claims to complex commercial/contract disputes, employment-based grievances and real estate matters. She has effectively resolved sensitive family business and estate disputes and has worked as a mediator and facilitator with numerous Indian Tribes in the Northwest to assist with conflict resolution and new business formation issues. She also serves as a Special Master


UPS School of Law, JD, Cum Laude, 1982
University of Utah, BS, Cum Laude, 1977
USA&M Mediator Training, 1991
USA&M Advanced Mediator Training, 2001, 2004, 2005

Practicing in Washington

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