Arvin Arbitration & Mediation Lawyers

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...

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...

I am currently Litigation Director for Denning Moores APC and litigating cases in the areas of Civil Appeals and Writs, Medical Malpractice, Elder Abuse, Wrongful Death, Premises Liability, Real Estate and Land Use, Commercial Contracts, Construction Defect and Complex Business Litigation. Most of my background is in civil appeals and writs, which has given me a unique perspective on trial practice in vast areas of the law.

Robert Bosso has been an attorney in Santa Cruz for over 55 years, after graduating from the University of California Law School in 1964 (top 10% of his class--Law Review Note & Comment Editor) which he followed with two years in U.S. Army Intelligence Corps rising to the rank of Captain in charge of a regional field office. He has experience in trial work (although he no longer does trial work), real estate, water law, business law, and general estate planning areas. He also serves as an Arbitrator and Mediator for other attorneys cases He has served...

Breanna Cornwall is the firm’s founder and managing attorney. Since going into private practice, she has focused on representing clients involved in family law matters including divorce, military divorce, child custody, and spousal support. She also represents clients in obtaining (and defending against) domestic violence restraining orders and civil restraining orders such as civil harassment restraining orders, workplace violence restraining orders, and private postsecondary school violence restraining orders.

Prior to starting her own firm, she had an extensive background as a business owner and entrepreneur. She started and managed a staffing agency and a real estate brokerage. Her business and...

Karen Matcke Crosby Attorney / Mediator P.C. 35+ years of legal practice and 15+ years as a mediator. WHY MEDIATION CAN BE SUPERIOR TO COURT By Karen Matcke Crosby (2021) Court litigation exposes parties to great public exposure, expense and long delays in court proceedings. Litigants have little or no control over the procedural process. How a dispute arose in the first place, is given short shrift, failing to consider the parties’ intentions, experience in negotiations (or lack thereof), personality, ego, culture, norms, morals, bullying, customs, or values. What is heard in court is the representing attorney’s version of his client’s legal...

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...

Miles, a Phillips ADR mediator, excels in securities, antitrust, professional liability, mass torts, and complex commercial litigation, closing settlements totaling nearly $2 billion. Previously, he was a renowned trial and appellate lawyer for over 40 years, serving as Global Chair of Latham & Watkins’ Litigation Department. Recognized as a “legendary litigator” by the New York Law Journal, he received its Lifetime Achievement Award and accolades from Chambers USA, Best Lawyers (New York City’s Lawyer of the Year for Securities Litigation), and the Lawdragon 500 Hall of Fame. His economics and mathematics expertise aids in analyzing damages and crafting innovative settlement...

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”...

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...