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 A&O 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.