Dewey Ballantine has hired two new partners for its international practice. Robert de By will lead the international arbitration practice, working out of New York and London. Starting his career at Sullivan & Cromwell, he has more than 20 years’ experience in domestic and international arbitrations and transnational litigation. The firm is also hiring Timothy Coleman as a litigation partner. He will co-chair the firm’s white-collar crime and government investigations practice group. He currently serves as senior counsel to the US Deputy Attorney-General. Dewey Ballantine currently has more than 550 attorneys.