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William Leininger
William Leininger

Senior Mediator

Senior MediatorThis mediator has at least 100 hours of mediation training, 500 hours of mediation experience, agrees to take part in at least 12 hours per year of continuing mediation education, and subscribes to's required standards of mediation practice.Featured MemberCertified Mediator

William Leininger

We have offered Divorce Mediation services since 1994. Most of our clients wish to divorce with dignity, and with as little emotional injury to their children. Other clients are attracted to our mediation service because a “cash business” or other unreported income situation is present and they desire total confidentiality. Many other clients have used our mediation services because they have millions of dollars in assets, or own a business or medical practice. Other clients include New York City school teachers, Policemen and Firemen with pensions worth up to two million dollars. All of our New York Divorce Mediation services are conducted either online using Zoom videoconferece or at our Staten Island , New York location located at 900 South Avenue, Staten Island, NY 10314.  Call (718) 979-5200 to schedule mediations in our Staten Island, New York office or via Zoom.  We offer an Free initial 30 minute introductory mediation session so that you and your spouse will be able to get a good idea of how divorce mediation will work for you.

We offer videoconferencing mediation sessions at no additional cost above our normal hourly rate! This can be of great convenience if one or both spouses must be out of town.

Mr. Leininger was admitted to the New York Bar in 1975, and was subsequently admitted to the Florida Bar in 1988. He devotes his practice solely to Divorce, Custody and Divorce Mediation matters in New York, New Jersey and Florida.   He has been a Certified Divorce Mediator in New York since 1994. Mr. Leininger is also a Florida Supreme Court Certified Family Mediator (28593F).

Mr. Leininger has lectured on Divorce Mediation for over 25 years and has mediated over 850 divorce mediations to conclusion. He has appeared on national TV & radio programs including the Sallie Jessie Raphael Show, The Phil Donahue Show, The Today Show on the NBC Network, CBS Morning Show on the CBS Network, etc.

Mr. Leininger is a Founding Board Member of the Academy of Professional Family Mediators, and is also a member of the Florida Academy of Professional Mediators and the New York State Council on Divorce Mediation.

ADR Experience

Mr. Leininger has mediated over 850 divorce matters in his Mediation Practice since 1994. Many of his Divorce Mediation cases involve business owners and medical professionals, and couples who have assets of millions of dollars, as well as police officers, firefighters, correction officers, teachers, etc.


I seek to empower my clients to come to a resolution which they can both embrace as fair and reasonable. Our goal is to encourage Divorce with Dignity with as little harm as possible to the children!


Mr. Leininger graduated with the Rank of #1 in his Evening Division graduation class of Fordham Law School in 1974.

Areas Of Practice

  • Divorce (all issues)
  • Divorce (parenting)
  • Family
  • Online Family/Divorce
  • Online Mediation
  • Pet Mediation
  • Prenuptial

Additional Services

  • Arbitrator
  • Collaborative Professional
  • Conflict Coach
  • Mediating Lawyer
  • Mediation Consultant
  • Mediator-Arbitrator
  • Online Arbitrator
  • Parenting Coordinator
  • Representational Lawyer



Fees and Provisos

The cost of a New York Divorce Mediation at our firm for a couple with children, a house and Deferred Compensation Benefits usually ranges between $3,000 and $6,500 total for the couple. If a business or professional practice is involved, or there are substantial assets, the total fee will usually be higher. These fees include the preparation of a comprehensive Marital Settlement Agreement which usually ranges from 30 to 60 pages in length. The Divorce Mediation Retainer is $2,500. All retainer deposits are refunded if not used up, and all retainer deposits are held in our Escrow Account andgenerally  billed against each month.

Liability Insurance

  • Yes

Professional Associations

  • NYSCDM - NY St. Council on Div. Mediation
  • FAPM - FL Acad. of Professional Mediators
  • APFM - Acad. of Professional Family Mediators