With its profits and revenues surging, Quinn Emanuel Urquhart & Sullivan has added a partner from Arnold & Porter in Washington, D.C., to head its local international arbitration practice, while announcing the opening of a second German office in Hamburg.

An 11-lawyer team from Allen & Overy specializing in antitrust and IP litigation will form the foundation of Quinn Emanuel’s new office in Hamburg, according to U.K. publication Legal Week. Nadine Herrmann, who made partner at Allen & Overy in 2009 and headed the firm’s German IP group, will become the managing partner of Quinn Emanuel’s new office in Germany’s second-largest city.