150 N. Michigan Ave. Ste. 1420
Chicago, IL 60601

J. Mark Weiss

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Law Office of J. Mark Weiss, P.S.

Contact Information

100 W. Harrison St., South Tower, Ste. 470
Seattle WA 98119-4116
Work (206) 622-6707

Practice State



J. Mark Weiss helps his clients resolve disputes without resorting to court intervention. He helps his clients develop objectives, and then achieve long-term solutions that are consistent with those objectives. Mark works primarily as an attorney in the Collaborative Law process. He also works as a facilitative mediator. Mark has extensive training in dispute resolution, and is very experienced assisting clients reach mutually acceptable agreements while staying out of a destructive win-lose dynamic. Mark is rated among the “Top 25” Family Law attorneys in the State of Washington by Washington Law & Politics Magazine, and recognized as a leader in Washington for his expertise in substantive divorce law, in addition to Collaborative Divorce, divorce settlement negotiation, and mediation.


Collaborative Law, Mediation, and Consultation


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  • King, Washington
  • Pierce, Washington
  • Snohomish, Washington


1987 - Juris Doctor, Northwestern School of Law at Lewis & Clark College, Portland, Oregon

Legal Organizations

King County Bar Association, Trustee, 2005-2008; King County Collaborative Law, Director, 2007-present; King County Collaborative Law Secretary, 2008-2009; Washington State Bar Association, Family Law Section Chair, Executive Committee, 1997-2005; International Academy of Collaborative Professionals, 2005-Present


"Ken Weber Attorney of the Year Award", Washington State Bar Association, Family Law Section, 2005; "Super Lawyer", Washington Law & Politics, annually since 2007; Basic and advanced mediation and Collaborative Law training.

CLE Presentations

Frequent presenter on family law issues, and Collaborative Law Trainer. See Mark's website for details.


"Family Law Court Records", "Family Law Deskbook," Washington State Bar Association; "Community Property Interests in Separate Property Business," 40 Gonzaga L. Rev. 205 - 2005; Co-author, "Lawrence and Nunn Reject the 'Friendly Parent Concept", Domestic Violence Report, 2001; Contributing Editor, Washington Practice Family and Community Property Law; "Collaborative Law: Questions and Answers," King County Bar Bulletin (2008).

AAML National

Member, Collaborative Law Committee

AAML Chapter

President, 2010-2011.

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