Les Wallerstein

les-wallerstein-updated-smlI specialize in divorce mediation and non-adversarial family law, with traditional and non-traditional families. In 1996 I stopped representing clients in litigation, (i.e., actions captioned as “plaintiff versus defendant”). I believe it is especially important to avoid the ravages of litigation when children are involved. When litigation is unavoidable I refer clients to lawyers who practice litigation.I am an attorney with a master’s degree in psychology committed to the least adversarial practice of law possible. I had 20 years of experience working as a psychotherapist with individuals, couples, families and groups before becoming a lawyer. I am certified as a divorce mediator by the Massachusetts Council on Family Mediation and trained as collaborative counsel.

While collaborative legal representation is an integral part of my work, mediating family disputes remains at the heart of my practice.


Massachusetts Council on Family Mediation
Member: 1993 – present
Board of Directors: 1993 – present
President: 2001 – 2002
Founder & Editor, Family Mediation Quarterly: 2002 – 2013

Massachusetts Collaborative Law Council
Founding Member: 2000
Board of Directors: 2000 – 2004
Treasurer: 2000 – 2002
Co-founder & Co-editor, Collaborative Law Journal: 2003 – 2006
Member: 2000 – 2010

Massachusetts Bar Association
Member: 1990 – present
Family Law Section: 1998 – present

National Lawyers Guild
Member: 1990 – present

Aids Action Committee of Massachusetts
Volunteer Attorney: 1992 – present


Certified Divorce Mediator
Massachusetts Council On Family Mediation: 1996

Principal Psychologist
Commonwealth of Massachusetts: 1974

Licensed & Certified Social Worker
Commonwealth of Massachusetts: 1982

Justice of the Peace
Commonwealth of Massachusetts: 2008

Free Divorce Mediation Consultations

Couples actively seeking to divorce in Massachusetts are welcome to schedule a free, one-hour meeting to discuss divorce mediation. An initial meeting without cost allows divorcing couples a no-risk opportunity to gather information and explore the possibilities of mediation.

arrowFree, one-hour divorce mediation consultations are only offered on weekdays from 9:00 AM to 4:00 PM if no family court actions are pending… or have been filed in the past two years.