Purcell focuses on class actions, intellectual property, media and commercial litigation, across copyright, patents, trademarks and unfair competition.
Her previously worked at Quinn Emanuel Urquhart & Sullivan where he was senior partner.
Aaron Jacoby, managing partner of Los Angeles at Arent Fox, said: “We are thrilled to welcome John Purcell to the firm.”
“He will add to our deep bench of litigators who counsel clients strategically and efficiently, with an eye on ensuring we meet their business objectives. John’s diverse skillset and valuable courtroom experience is a great addition to our national litigation team.”