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Warren Postman is a Partner at Keller Lenkner LLC. He combines a deep understanding of the civil litigation system with broad substantive expertise to solve complex litigation challenges for the firm’s clients.

Before joining Keller Lenkner, Warren was Vice President and Chief Counsel for Appellate Litigation at the U.S. Chamber Litigation Center. In that role, he managed appellate strategy for the U.S. Chamber of Commerce, which participates in more than 150 cases each year to shape the law on a wide range of issues affecting businesses. Working closely with senior in-house lawyers at some of the world’s largest companies, Warren gained unique insight into the dynamics and trends that shape business litigation. He has particular expertise in class action litigation, arbitration, labor and employment litigation, federal jurisdiction, and constitutional law.

Warren was previously an attorney in the Issues & Appeals practice at Jones Day, where he helped guide trial and appellate strategy in some of the firm’s most complex and high-stakes cases.

At both Jones Day and the U.S. Chamber, Warren regularly represented plaintiffs challenging the actions of federal agencies. He has won victories against the Food and Drug Administration, Department of Health and Human Services, Federal Communications Commission, Department of the Treasury, Department of Labor, Environmental Protection Agency, and Army Corps of Engineers.

Warren served as a law clerk 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 graduated magna cum laude and Phi Beta Kappa from Brandeis University.