TMS benefits from the quality of commitment from our Members and our dedicated Board of Directors, each person having been selected for his/her excellence in the field of mediation.  TMS strongly encourages Members to actively participate by joining one of our Committees, as well as by contributing knowledge and resources in other ways.  If you are a Member and are interested in volunteering on one of the Committees listed below or would like to present on a topic of interest to you, please contact the identified Committee Chair or a Committee Member.

TMS currently has seven volunteer Committees, each with a Chair that reports to the Board.

Dinner Committee

Chair: Dolores Dalton, E-mail

The Dinner Committee organizes three to four memorable dinner events each year. Members bring in well-known speakers in the field who present on cutting-edge topics of importance to all mediators.  The Dinner Committee seeks to meet the interests of members and invites suggestions for topics or speakers.


Dolores Dalton, E-Mail

Education Committee

Co-Chair: Stephen H. Sulmeyer, E-mail

Co-Chair: Roderick M Thompson, E-mail

The Mediation Society sponsors a biennial, half-day or full-day education program in the spring.  The program is designed and implemented by the Education Committee which assembles knowledgeable panelists, arranges the venue and catering, and works with the organization’s Administrator to create marketing and program materials.


Richard J. Collier, E-Mail

Howard Herman, E-Mail

Membership Committee

Chair: Grace Seferian PE, PMP, MEM, E-mail

The Membership Committee considers membership applications, coordinates outreach to Members for feedback on their TMS membership, and helps to collect dues.



Otis McGee, E-Mail

James R. Madison, E-Mail

Richard J. Collier, E-Mail

Joint Society Session Roundtable Committee

Co-Chair: Linda H. Schieber, E-mail

Co-Chair: Daniel Riviera, E-mail

Society Sessions are 1.5 hour lunch-time gatherings held approximately nine times per year in diverse locations around the Bay.  The Society Session Committee selects discussion leaders who present on topics of interest and lead participatory discussions that follow. These informal programs allow for collegial dialogue and build community among our members.

Roundtables are one-hour breakfast discussions held approximately five times per year in San Francisco.  The Roundtable Committee selects topics, identifies excellent discussion leaders and coordinates the food served.  The Committee seeks to meet the interest of Members and invites suggestions for topics or speakers/moderators.


Kenneth P. Strongman, E-Mail

Marissa Wertheimer, E-Mail

Richard J. Collier, E-Mail

Judith A. Mazia, E-Mail

Sanford Kingsley, E-Mail

Thomas Crosby, E-Mail

Website Committee

Chair: Peter Smith, E-mail

The Website Committee is responsible for the Mediator’s Corner, a publication of short articles by Members on topics relevant to mediators.   The Committee also administers Resources & Reading available only to Members, is responsible for the functionality of features of TMS’ website, and other maintenance of the website.


Peter Smith, E-Mail