Margaret O’Neill is a member of the firm’s Finance Group. She was admitted to the bar in New York in 1999.

Prior to attending law school, Ms. O’Neill was an instructor at the Shunan English School in Yamaguchi, Japan from 1992 to 1994. She joined Debevoise in 1997.

Ms. O’Neill received her B.A. magna cum laude from Harvard in 1992, where she majored in English, and her J.D. in 1997 from Columbia. She was a Stone Scholar and managing editor of the Columbia Law Review.


  • Columbia Law School, 1997, J.D.
  • Harvard University, 1992, B.A.

Bar Admissions

  • New York