Warren Postman is the Managing Partner of Keller Postman LLC and Postman Law. A relentless fighter for everyday people, he combines a deep understanding of the civil litigation system with broad substantive expertise to take on the biggest corporations — and win. His work has secured over $3 billion in settlements for more than 1.5 million clients and, according to The New York Times, left corporate defendants "scared to death."
At Keller Postman, Postman has built one of the most consequential arbitration practices in civil litigation, devoting unparalleled resources to resolving the claims of consumers and employees subject to forced arbitration clauses. The firm aggressively pursues individual arbitrations for tens of thousands of clients simultaneously, and Postman has won numerous precedent-setting victories requiring defendants to comply with their own arbitration agreements. In the last two years alone, Postman Law and Keller Postman have secured over $3 billion in settlements for more than 1.5 million individual clients.
Lawdragon Honors
| Honor |
Year |
Practice |
| The 2027 Lawdragon 500 Leading Litigators in America |
2027 |
Mass Arbitration, Class Action, Plaintiff |
| The 2026 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2026 |
Commercial Litigation, Antitrust & Arbitration |
| The 2026 Lawdragon 500 Leading Plaintiff Consumer Lawyers |
2026 |
Consumer Litigation, Mass Arbitration |
| The 2026 Lawdragon 500 Leading Lawyers in America |
2026 |
Plaintiff Financial Litigation |
| The 2026 Lawdragon 500 Leading Litigators in America |
2026 |
Mass Arbitration, Class Action, Plaintiff |
| The 2025 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2025 |
Commercial Litigation, Antitrust & Arbitration |
| The 2025 Lawdragon 500 Leading Plaintiff Consumer Lawyers |
2025 |
Consumer Litigation, Mass Arbitration |
| The 2025 Lawdragon 500 Leading Lawyers in America |
2025 |
Plaintiff Financial Litigation |
| The 2025 Lawdragon 500 Leading Litigators in America |
2025 |
Mass Arbitration, Class Actionn, Plaintiff |
| The 2024 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2024 |
Commercial Litigation, Antitrust & Arbitration |
| The 2024 Lawdragon 500 Leading Plaintiff Consumer Lawyers |
2024 |
|
| The 2024 Lawdragon 500 Leading Lawyers in America |
2024 |
Plaintiff Financial Litigation |
| The 2023 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2023 |
Commercial Litigation, Antitrust & Arbitration |
| The 2023 Lawdragon 500 Leading Lawyers in America |
2023 |
Plaintiff Financial Litigation |
| The 2022 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2022 |
Commercial Litigation, Antitrust & Arbitration |
| The 2022 Lawdragon 500 Leading Lawyers in America |
2022 |
Plaintiff Financial Litigation |
| The 2021 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2021 |
Commercial Litigation, Antitrust & Arbitration |
| The 2021 Lawdragon 500 Leading Lawyers in America |
2021 |
Plaintiff Financial Litigation |
| The 2020 Lawdragon 500 Leading Plaintiff Financial Lawyers |
2020 |
Commercial Litigation, Antitrust & Arbitration |
| Lawdragon 500 Leading Plaintiff Financial Lawyers |
2019 |
Commercial Litigation, Antitrust & Arbitration |
Before joining Keller Postman, Postman served as Vice President and Chief Counsel for Appellate Litigation at the U.S. Chamber Litigation Center, where he managed appellate strategy for the U.S. Chamber of Commerce across more than 150 cases annually. Working closely with senior in-house lawyers at some of the world's largest companies, he gained unique insight into the dynamics and trends shaping business litigation.
Postman clerked for Justice David H. Souter at the Supreme Court of the United States and Judge William A. Fletcher at the U.S. Court of Appeals for the Ninth Circuit. He graduated magna cum laude from Harvard Law School, where he was Articles Editor on the Harvard Law Review, and magna cum laude and Phi Beta Kappa from Brandeis University.
Warren is licensed to practice law in California, Ohio, and the District of Columbia only.