Don P. Desonier
  • Mercer Island, WA
  • United States
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Counselor at Law
Desonier Law & Mediation Services, P.S.
Services Provided
Legal Advice & Counsel, Advocacy, Arbitrator, Collaborative Law, Mediator
Practice Areas
Collaborative Law, Family Law
Don P. Desonier helps divorcing or separating individuals achieve a respectful resolution. He is a collaborative family law attorney, divorce legal coach, FasTrack Divorce™ attorney, and family mediator.

As an additional component of his dispute resolution practice, Don provides foreclosure mediation services through the Washington State Department of Commerce.

Don also provides 30-hour interest based negotiation skills trainings.

Mr. Desonier is an Adjunct Professor of Law at Seattle University School of Law, teaching in the areas of Dispute Resolution, Mediation, Collaborative Law, Negotiation, and Client Counseling. Don is a past President of King County Collaborative Law
( He can be found at

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