Leigh E. O'Neil, Associate

Leigh E. O’Neil, Associate

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Ms. O'Neil is an Associate at Block & Leviton LLP where she focuses on securities litigation, consumer protection and antitrust issues.  Ms. O'Neil has been integrally involved in litigating numerous securities class action cases, most recently serving as a key member of the trial preparation teams in the cases of In re Google Inc. Class C Shareholder Litigation, case no. 7469CS (Del. Ch.) and In re BP plc Securities Litigation, case no. 4:10-md-02185 (S.D. Tex).  Ms. O'Neil is also a member of the Competition Law Team, litigating cases such as In re Gypsum Antitrust Litigation, case no. 13-cv-00382 (E.D. Pa.) and In re Lithium Ion Batteries Antitrust Litigation, case no. 13-MD-02420 (N.D. Cal.).

Prior to joining the firm, Ms. O'Neil was a Commercial Litigation Associate at Cooley Manion Jones, LLP in Boston, MA.  In that role, Ms. O'Neil conducted extensive research and analysis of complex contractual indemnification and environmental law issues.  Ms. O'Neil was also chosen as a member of the trial team in Invista B.V. et al, v. E.I. Du Pont de Nemours and Co., case no.  08-3063, where she assisted in litigating hundreds of millions of dollars in remediation costs in the United States District Court for the Southern District of New York, ultimately resulting in a favorable settlement after three weeks of trial.  Prior to becoming an attorney, Ms. O'Neil was a law clerk at Cooley Manion Jones where she worked on a variety of complex business disputes including:  employment litigation, intellectual property challenges and the defense of corporations against government investigations and allegations of unfair and deceptive trade practices. 

Ms. O'Neil received her law degree from Northeastern University School of Law in 2011 where she was a Dean's Scholar.  Ms. O'Neil was also one of three students selected as a research assistant to update the first year research and writing program curriculum.  She was then appointed as a teaching assistant and was personally responsible for mentoring four classes of first-year law students in the development of legal research and writing skills.  In addition, Ms. O'Neil represented Northeastern at the International Trademark Association's Saul Leftkowitz Moot Court Competition and served on the Northeastern University Law Journal.

During law school, Ms. O'Neil completed internships with the Honorable Judith G. Dein of the United States District Court for the District of Massachusetts and  in the civil division of the United States Attorney's Office in Boston.  Her caseload at the U.S. Attorney's Office included both affirmative and defensive civil litigation with a focus on multi-district pharmaceutical litigation.  Ms. O'Neil received an Honors Bachelor of Arts degree from McGill University in 2006.  She also completed an interdisciplinary sports management certificate program at Wake Forest University.

Ms. O'Neil is admitted to practice in the Commonwealth of Massachusetts, the State of Rhode Island and the United States District Court for the District of Massachusetts.