Mr. O'Shaughnessy is a trial lawyer, concentrating on complex litigation of all kinds, including antitrust, intellectual property litigation, class action defense, unfair competition and contract disputes. He regularly appears at the trial and appellate levels of the federal and state courts, both in and out of New Jersey, and has been chief counsel in domestic and international arbitrations.
He currently handles or has handled a wide variety of antitrust cases in New Jersey and elsewhere, involving price-fixing, group boycott, monopolization, resale price maintenance and price discrimination claims.
Mr. O'Shaughnessy has been recognized as a New Jersey Super Lawyer since the publication's inception and in The Best Lawyers in America for more than 20 years. He has also been recognized in Chambers USA as a “Senior Statesman” for General Commercial Litigation in New Jersey, and according to sources quoted in Chambers, he is considered "very wise and experienced."