Practice Areas
Bart Williams is one of the nation’s most sought after trial lawyers and commercial litigators. A Fellow of The American College of Trial Lawyers, he has served as lead counsel for numerous companies in their most challenging and high-profile cases and investigations. Bart has represented Fortune 500 companies in multiple industries, including: sports, media and entertainment, financial services, consumer products, technology and telecommunications, pharmaceutical, and private equity. He has represented multiple major law firms in their most serious professional negligence cases. He has also represented celebrities, government officials and corporate executives individually in high-stakes matters.
Bart was appointed by United States Supreme Court Chief Justice John Roberts to serve a three-year term (beginning January 2026) as one of the four practitioner members of the Standing Committee on Rules of Practice and Procedure of the Judicial Conference of the United States, which drafts and recommends new federal rules of practice, procedure, and evidence.
A leader within Proskauer, Bart is a past member of the Firm’s Executive Committee and serves as worldwide chair of the Litigation Department and head of Proskauer’s Los Angeles office.
Bart served as an assistant U.S. Attorney in the Central District of California where he concentrated on complex criminal prosecutions involving allegations of fraud or other business crimes. He obtained convictions in 11 out of 11 jury trials. He received several special commendations during his tenure, including one from the Honorable Louis J. Freeh, then-director of the FBI.
Bart is a graduate of Yale College and Yale Law School. He was a starting guard for four years on the Yale Varsity Basketball Team, and received the George McReynolds Award as the team’s Most Valuable Defensive Player his senior year.
