John Terzaken, co-head of the global antitrust practice at Allen & Overy and head of the Magic Circle firm's investigations and litigation practice in Washington, D.C., is poised to join Simpson Thacher & Bartlett as a partner in the nation's capital.

“It's great opportunity,” Terzaken said. “Simpson Thacher is a terrific firm and I think most compelling to me was to get to work alongside others who do what I'll call high-end crisis management [in] the fraud, sanctions and securities space.”

Terzaken, who joined Allen & Overy five years ago from the U.S. Department of Justice, has spent his time in private practice representing both international and national clients in government enforcement and litigation matters related to cartel and antitrust violations. Before joining the firm in 2012, Terzaken spent nearly eight years in the Justice Department's antitrust division.