San Diego County Arbitration & Mediation Lawyers

Certified - Pepperdine University - Straus Institute for Dispute Resolution

EXPERTISE IN CONFLICT TRANSFORMATION Mari Frank is an attorney, mediator, Certified Information Privacy Professional (CIPP), author, professor, and radio show host in private practice in California and Florida. She worked in the District Attorney’s Office, practiced insurance defense law, and had a general civil law practice. She has successfully resolved thousands of disputes as a neutral since 1985. Ms. Frank was the founding President of the Orange County Chapter of the Society for Professionals in Dispute Resolution-Orange County, California. She served for three years as founding Chair of the State Bar of California Alternative Dispute Resolution Committee She is a...

Mr. Helm, a Phillips ADR neutral, has mediated disputes up to ten figures in securities, class actions, shareholder disputes, corporate transactions, mass torts, professional liability, land use, sexual misconduct, ERISA, and intellectual property. He serves on the PG&E bankruptcy mediator panel and studied mediation at the Straus Institute. Previously, he was on the U.S. District Court, Central District of California ADR panel. A panelist on the American Arbitration Association roster and Institute for Transnational Arbitration advisory board, Mr. Helm has arbitrated business and consumer disputes and advocated in complex arbitrations involving asset management, trade secrets, and international investments. Before Phillips ADR, Mr....

Elliot Brown, a Phillips ADR neutral, is the former managing partner of Irell & Manella LLP. He spent nearly 30 years in IP litigation, counseling, and licensing at a top IP practice. Elliot graduated cum laude from Harvard College (1985), earning Phi Beta Kappa and a John Harvard Scholar award. He studied philosophy of science at Princeton, receiving an MA (1987) and a Mellon Fellowship, where game theory and Daniel Kahneman’s work on bargaining and cognitive bias shaped his approach to dispute resolution. He earned his J.D. magna cum laude from Harvard Law School (1990), serving as a Harvard Law Review...

Layn R. Phillips, founder of Phillips ADR Enterprises (PADRE), is a former U.S. Attorney and U.S. District Judge. Appointed at age 35 by President Reagan, he presided over 140+ trials in Oklahoma, New Mexico, and Texas, and sat by designation on the Tenth Circuit Court of Appeals. Earlier, Judge Phillips served as an Assistant U.S. Attorney in Los Angeles, and at age 31, was nominated as U.S. Attorney for the Northern District of Oklahoma. After leaving the bench, he spent 23 years at Irell & Manella, focusing on complex civil litigation, internal investigations, and alternative dispute resolution. He later founded PADRE, specializing...

Margaret B. Seymour, a retired U.S. District Judge (District of South Carolina, 1998–2022), was the first African American woman federal judge and chief federal judge in South Carolina. She served as a U.S. Magistrate Judge (1996–1998) before her district court appointment. Over 26 years, Judge Seymour presided over complex securities, contract, class action, commercial, banking, bankruptcy, employment, discrimination, and environmental cases, as well as criminal matters like drug conspiracies, white-collar crime, and Ponzi schemes. She sat by designation on the Fourth Circuit and participated in two three-judge-panel redistricting cases. She served twice on the Judicial Conference Committee on the Administration of...

Michelle Yoshida, a full-time mediator, arbitrator, and special master since 2007, joined Phillips ADR in 2014. Previously with Judge Daniel Weinstein’s team, she has mediated over 500 disputes with billions in settlements, excelling in complex cases involving securities, insurance, professional liability, ERISA, and trustee issues. Known for quickly grasping legal and factual complexities, she manages large ADR cases with objectivity and determination, finding practical solutions for disputes ranging from personal contracts to major corporate matters. Michelle builds trust and productive relationships with mediation participants. Before becoming a neutral, she was a trial attorney handling complex business litigation, including contracts, insurance, intellectual...

Seth Aronson joined Phillips ADR in 2023, mediating disputes up to ten figures in securities, consumer class actions, privacy, false claims, shareholder derivative, antitrust, RMBS fraud, and complex litigation. He serves on the ADR panel for the U.S. District Court, Central District of California. Retiring from O’Melveny & Myers LLP in 2022 after 40 years as a trial and appellate lawyer, Seth was managing partner of O’Melveny’s Los Angeles office and chaired its Securities Litigation practice. Ranked by Chambers USA for 20 years, he was named California Securities Litigation Attorney of the Year twice by Benchmark Litigation, a “Top 100 Lawyer”...

Chuck Stevens joined Phillips ADR after a 40-year career as a litigation partner at Gibson Dunn & Crutcher, U.S. Attorney, and neutral in ADR matters. At Gibson Dunn’s San Francisco office, he served as managing partner for six years and was recognized by Lawdragon (2023 Leading Global Litigators), Benchmark Litigation (2024 Litigation Star), and Chambers (Band 1, California Litigation). He was named San Francisco’s Lawyer of the Year for Bet-the-Company Litigation (2019) by Best Lawyers. Chuck founded a boutique litigation firm, handling complex civil cases and qui tam matters. As a neutral, he mediated for the Eastern District of California’s Voluntary...

Clay joined Judge Phillips’ ADR practice in 2011. He graduated cum laude from Pepperdine University (B.A., History, 2006) and earned his J.D. from Fordham Law School (2011). He is admitted to the New York and California State Bars. Clay began mediating small claims in Bronx County Civil Court during law school. With over a decade at Phillips ADR, he now mediates complex disputes involving major companies in areas like antitrust, class actions, intellectual property, environmental, mass tort, insurance, securities, and contract disputes. He has worked on over 500 mediations, assisting Judge Phillips before, during, and after sessions, and directly engaging parties...