The Department of Justice’s Antitrust Division announced the elevation of Section Chief Kathy O’Neill to the new role of senior director of investigation and litigation.

O’Neill, who most recently served as chief of the Antitrust Division’s Transportation, Energy and Agriculture Section, will serve in the Division’s front office as the senior-most career civil antitrust attorney, with responsibility over all civil merger and conduct investigations and litigation. 

Prior to joining the Antitrust Division 12 years ago, O’Neill worked as an assistant attorney general for the New York State Attorney General; an attorney advisor for the Federal Communications Commission; and in private practice. She has played a leading role in advancing numerous high-profile matters, including the Antitrust Division’s investigation and settlement of Bayer’s proposed acquisition of Monsanto; the Division’s civil investigation of a big-rigging conspiracy by several South Korea-based companies, which resulted in record-setting settlements under Section 4A of the Clayton Act; and the Division’s successful challenge to Halliburton’s proposed acquisition of Baker Hughes.