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Listing from the official roster · not yet claimed by the mediator

William Diffenderfer

San Ramon (Contra Costa County) · residing county: Alameda

San Mateo Superior Court Multi-Option ADR Project (MAP) Civil ADR PanelSanta Clara Superior Court Civil ADR Provider Database (mediators/neutral evaluators/arbitrators)Solano Superior Court Mediator Directory

Where William can work

Court-certified in

  • California Verified Superior Court of California, County of Santa Clara, checked 2026-10-07 · official roster

From official public rosters only. Courts may require a mediator from their own approved list for court-ordered cases.

Serves clients

Not stated yet. Mediators add where they serve clients (in person and online) after claiming their listing.

Provided by the mediator, not checked against a roster. Working with clients online in a state is not a certification in that state.

Practice details

Case types
Family & divorce, Civil lawsuits & business, Probate, estates & elder care, Arbitrators
Languages
English
Location
San Ramon (Contra Costa County) · residing county: Alameda
Practice areas (per source)
Construction; Construction/Defect; Defamation; Family; Insurance; Medical Malpractice; Neighborhood; Personal Injury; Probate; Professional Malpractice; Professional Negligence; Real Estate
Serves (per roster)
San Mateo; Santa Clara; Solano

Fees and bio appear after the mediator claims this listing.

More mediators: California · Alameda County · Family & divorce in California · Civil lawsuits & business in California · Probate, estates & elder care in California · Arbitrators in California

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