Bart H. Williams

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. 

Commercial Litigation clients recently interviewed by Chambers USA commented:

“Bart is a brilliant, incredibly talented lawyer.”

“By every measure Bart is a star.”

“He’s one of the best litigators with whom I’ve ever worked. He’s an amazingly smart and talented lawyer.”

“Bart is a fantastic lawyer who is super smart and always well-polished when it comes to court. If a major problem is at hand, he is the guy to pick.”

“He has deep trial expertise which informs the way he approaches cases from the outset. He's incredibly effective in oral argument and written advocacy.”  

Trial clients recently interviewed by Chambers USA commented:

"Whenever you want a case to be won, you give it to Bart Williams. I can't say enough good things about him."

"He is really in the league of his own in regards to the cases he has tried this year."

"He's incredibly calm under pressure and knows when to be aggressive in cross-examinations. He just has a way of making juries want to listen to him."

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Bart has compiled an impressive list of victories in jury and bench trials throughout the United States [Click on “View Matters List” below]. Forbes named Bart among their inaugural list of the “Top 200 Lawyers in the U.S.” in 2024. For several years, Benchmark Litigation has listed Bart as one of the Top 100 Trial Lawyers in America. Bart has also been featured in The American LawyerLaw 360, LMG Life Sciences, Los Angeles Business Journal and the Daily Journal, which has repeatedly named him one of the top 100 lawyers in the State of California. In 2018, both Benchmark Litigation and Chambers USA named him as a finalist for National Trial Lawyer of the Year. Chambers lists Bart as one of only 4 “Star Individuals” in the State of California for General Commercial Litigation.

A leader within the Firm, 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.

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