John Nadolenco

John Nadolenco is a California trial lawyer whose practice focuses on class action defense, ERISA litigation, electronic discovery, and other high-stakes business disputes. He represents clients in bet-the-company cases, complex trials, and major litigation involving significant financial and legal exposure. His work includes defending putative class actions, handling large-scale commercial disputes, and guiding clients through difficult cases with strong strategy, careful preparation, and experienced courtroom advocacy.

John earned his J.D., summa cum laude, from American University Washington College of Law and his B.A., summa cum laude, from the University of Arizona. His education gave him a strong foundation in legal research, writing, analysis, and advocacy. That academic training supports his work in complex litigation, where careful preparation and clear legal strategy are essential. His educational background reflects the discipline and precision seen throughout his legal practice.

John has built a strong career representing clients in trials, class actions, and major disputes across several industries. He has served as lead trial counsel in multiple cases that resulted in wins for his clients and has helped secure dismissals, defeat class certification efforts, and obtain major recoveries. His experience includes litigation involving automotive, technology, healthcare, and data-related issues.

John Nadolenco has helped clients protect their businesses and legal interests in matters involving class claims, technology disputes, constitutional challenges, and other complex litigation. His trial work includes defense verdicts in cases involving hundreds of millions of dollars, as well as significant recoveries and injunctions in high-profile matters. He is known for disciplined advocacy, strategic thinking, and a strong commitment to effective representation in difficult and closely watched legal disputes.

Law Office Affiliations

• Partner, Mayer Brown LLP
• Member, Los Angeles County Bar Association
• Member of the Board of Governors, Association of Business Trial Lawyers

Licensed State

• California

Education

• American University Washington College of Law
  Juris Doctor (JD)
• University of Arizona
  Bachelor of Arts (BA)

Awards & Badges