Photo of Warren Postman

Warren Postman

Managing Partner, Keller Postman

833-633-0118 | contact@kellerpostman.com

1101 Connecticut Avenue, N.W.
Suite 1100
Washington, D.C. 20036

View Firm Biography

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 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 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.

Featured Articles

Inside the Keller Lenkner Mindset

Inside the Keller Lenkner Mindset

Learn More

From Keller Lenkner to Keller Postman: Doubling Down on Mass Practice

From Keller Lenkner to Keller Postman: Doubling Down on Mass Practice

Learn More

Disrupting the Personal Injury Space with the Launch of Postman Law

Disrupting the Personal Injury Space with the Launch of Postman Law

The firm, run by the team behind Keller Postman, is bringing mass action expertise to individual cases.

Learn More