Warren Postman, formerly chief counsel for appellate litigation at the U.S. Chamber Litigation Center, has joined the Washington office of the plaintiff-side litigation boutique Keller Lenkner as partner.

Postman had held litigation roles at the Chamber since 2014, first as senior litigation counsel and then later as deputy chief counsel for litigation. The former Jones Day associate had been the top appellate litigator since January. Keller Lenkner, which launched this year, has sought to recruit litigators and trial lawyers.