Terry O'Neill is a feminist attorney, professor and activist who was elected Membership Vice President of the National Organization for Women in June 2001. She has taught at a number of law schools, primarily at Tulane University School of Law, where she taught feminist legal theory and international women's rights law, in addition to corporate law and legal ethics. As Membership Vice President she oversees NOW's membership database and direct mail systems, website content and legal issues.

O'Neill's feminist activism began with fighting right-wing extremists in the Deep South. She has served as president of Louisiana NOW, president of the New Orleans chapter and has been a member of NOW's National Board and National Racial Diversity Committee. She has also been active in Colorado NOW.

Using her background in law to fight important legal battles for feminists, O'Neill has written key amicus briefs at the federal, trial and appellate levels on abortion rights issues for Louisiana NOW, Planned Parenthood and the American Civil Liberties Union.

O'Neill's community activism includes work with labor unions, Louisiana's Lesbian and Gay Political Action Caucus, the Mayor of New Orleans' Task Force on Domestic Violence and ACORN of Louisiana.

O'Neill is also a skilled political organizer, having worked on campaigns ranging from the election of Louisiana's first woman U.S. Senator, Mary Landrieu to the successful defeat of David Duke's bid for the Louisiana governorship. She also worked on successful campaigns to elect women's rights supporters to the Louisiana state legislature and to state judgeships.