[3] Her junior year, she worked for the Office of the Administrative Assistant to the Chief Justice of the Supreme Court of the United States, Warren E.

[11] Olivarius helped coin the phrase "date rape" during the process,[13] which she publicized through a series of talks at the college and elsewhere in the US and England.

[20] Olivarius represented a group of professors and students at the University of Rochester, of which two plaintiffs, Celeste Kidd and Jessica Cantlon, were named "Persons of the Year" by Time magazine in its cover story "Silence Breakers" in 2017.

In 2017, she represented a British Sikh couple, who were turned away from an adoption agency because only white children were available, in a case against The Royal Borough of Windsor and Maidenhead that was supported by the Equality and Human Rights Commission.

In 2012, the American Civil Liberties Union (ACLU) included her in its list of nine most influential people in the history of Title IX.

[32] On 31 December 2022, she was awarded Officer of the Order of the British Empire (OBE) in the 2023 New Year Honours for services to justice and to women and equality.