John Terzaken

John Terzaken

Partner, Co-Head Antitrust
Washington, D.C.

John is the head of the firm’s U.S. Cartel practice and the firm’s D.C. Investigations and Litigation practice. He advises U.S. and international clients involved in domestic and cross border antitrust and other regulatory investigations and litigation. His practice spans government enforcement and private litigation of cartel and other antitrust infringements, market sector investigations, and general antitrust compliance, across all industry sectors.

Previously, John was Director of Criminal Enforcement of the DOJ, Antitrust Division, where he had management responsibility for the Antitrust Division’s criminal investigations and litigation nationwide. In his tenure with the Antitrust Division, John investigated, litigated, and presided over some of the largest global cartel investigations undertaken by the DOJ. He also served as the Antitrust Division’s primary liaison with state, federal, and foreign law enforcement authorities, as well as the Antitrust Division’s Financial Fraud Coordinator for inter-agency prosecutions, investigations, and information sharing. John’s DOJ service earned him awards of distinction from the Attorney General of the United States and Assistant Attorney General for the Antitrust Division.

John is a member of the Antitrust Sections of the American Bar Association (ABA) and International Bar Association (IBA) and is serving an appointment by the ABA on the International Cartel Task Force. John is also a regular author and frequent speaker on antitrust matters at ABA, IBA and other academic and client events.

John is recognized as a leading individual for both Nationwide: Antitrust – Cartel and District of Columbia: Antitrust. According to Chambers, “John Terzaken is ‘strategically very sharp and quite a dynamic operator,’ and ‘has excellent awareness of the big picture.’ Sources also note John is ‘extremely polished, smart and hard-working’ and ‘has provided excellent service as well as timely and practical advice.’”

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