John Terzaken is Global Co-Chair of the Firm’s Antitrust and Trade Regulation Practice. John represents corporate and individual clients involved in government enforcement of antitrust, fraud and other white collar violations, as well as related follow-on civil litigation. His experience spans market sector investigations and litigation in all major industries, including financial services, pharmaceutical, professional services, manufacturing, energy, shipping, food and beverage, and many others. John previously served as the Director of Criminal Enforcement of the Department of Justice, Antitrust Division, where he oversaw the Division’s criminal enforcement and litigation nationwide. He has earned awards of distinction from the Attorney General of the United States and the Assistant Attorney General for the Antitrust Division.
John was named a 2022 “MVP” in Competition by Law360, and is consistently recognized as a leading antitrust lawyer (Band 1) by Chambers Global and Chambers USA, where clients describe him as “. . . very strategic and creative with investigations,” “one of the strongest lawyers I have ever worked with,” “. . . a superb lawyer in the cartel space,” “. . . smart, provides practical guidance and brings a lot to the table with his DOJ background,” “knows the technical aspects of antitrust law and also how to intuitively apply that to business realities,” and has a “wonderful working manner with clients and government figures.” John is also recognized in The Legal 500 “Hall of Fame,” where sources say he is “the very best of the best,” he “brings unmatched knowledge, experience, relationships, attention to detail, responsiveness and wisdom to each engagement and interaction,” and that he “is equally comfortable speaking the language of law and the language of business.” He is recognized as a “Litigation Star” both nationally and in D.C. by Euromoney’s Benchmark Litigation and is recognized by Who’s Who Legal: Competition.
Updated Oct 2025
