Professional Details

J. Mark Weiss
Senior MediatorSenior MediatorSenior Mediator

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


Description of Practice

This Mediator is Certified
Mark has over 30 years experience helping clients plan for what's next by reaching good financial and co-parenting agreements. Mark is an experienced mediator, divorce lawyer, and Certified Divorce Financial Analyst. Mark's background includes work with complex financial and parenting questions. Mark is experienced helping families with businesses, real estate questions, tax questions, and other complex financial situations. Mark is a Fellow of the American Academy of Matrimonial Lawyers, and the recipient of the 2005 Attorney of the Year award from the Washington State Bar Association Family Law Section and the 2018 President's Award from Collaborative Professionals of Washington. He has been selected as a "Super Lawyer" by Washington Law & Politics magazine annually since 2007; and rated one of the "Top 25" family law attorneys by Washington Law & Politics magazine (Winter 2009 issue).

Professional Background

Mark has 30+ years of full-time experience helping families in divorce. His background includes business formation, tax advice, construction law, real estate law, and estate planning Mark is an author of multiple articles in professional publications, and a sought-after speaker and trainer among other professionals. For more information, go to Mark's website


Mark is a full-time mediator and Collaborative Law attorney. He started work as a lawyer in 1987, and retired from litigation in 2007. Mark has worked as a mediator for over 20 years, and has actively developed skills through ongoing education and experience.


Bachelor of Arts, 1982. Juris doctor, 1987. Certified Divorce Financial Analyst, 2017.


Dates    Trainer(s)    Title   
2005    Kathy Rice    Basic mediation training, 40
2006    Kathy Rice    Family law mediation training, 24
2007    Erica Ariel Fox    Harvard Negotiation Insight Initiative, 16
2008    Ken Cloke    Mediation training, 8
2007    Chip Rose    Mediation and Collaborative Law, 8
2009    Ken Cloke    Workplace mediation workshop, 8
2009    Joan Goldsmith    Family law mediation, 8
2011    Sharon Strand Ellison    Taking the War Out of Our Words, 7
2011    Richard Cohen    Narrative Mediation, 16
various    various    Many workshops on Collaborative law and other


Mark works with clients to define the questions that are foremost in their minds, to works proactively with clients to address the questions and resolve any disputes. Often, this includes helping make sense of finances and considering the risks and benefits of alternatives, so everyone can make good financial decisions.


Please contact us.

Other Information

More information on our website

Areas of Practice

  • Divorce (all issues)
  • Divorce (parenting)
  • Family
  • Marital Mediation
  • Organizational

Professional Services

  • Mediator
  • Conflict Coach
  • Collaborative Professional
  • Facilitator
  • Strategic Planning
  • Certified Divorce Financial Analyst
  • Mediation Trainer
  • Representational Lawyer
  • Mediation Consultant
  • Mediating Lawyer

References available upon request.

This dispute resolution professional keeps liability insurance.