[3] While studying for that degree, she began working for the American Federation of State, County, and Municipal Employees and the Staten Island Rapid Transit Operating Authority, where she became assistant director of labor-management relations.

[4] From 1987, Blumner held the position of executive director at the American Civil Liberties Union In Utah[6][7] where she frequently acted as spokesperson on topics such as freedom of speech (including for white supremacists such as Aryan Nations)[8] and abortion rights.

[11] Controversially, while with the ACLU, Blumner stated she is against affirmative action (also referred to as positive discrimination), saying: "I can no longer sit silently while my cohorts defend a discriminatory policy that favors groups of people solely on their gender, skin color or national origin...An advantage granted me due to my sex demeans my individuality, reducing me to a walking immutable characteristic.

[14] Blumner is an author and contributor to several publications, including Center for Inquiry in association with the Council for Secular Humanism[15] and Time magazine[16] in her capacity as CEO and president of CFI, and for her experience in civil liberties.

[23] In 2016, as president of the Center for Inquiry, Blumner championed a new global initiative called Secular Rescue which aims to protect and provide emergency support to non-believers, atheists and apostates, if necessary giving them an escape route from violence and death threats as well as diplomatic and legal assistance.

"It’s really an underground railroad of sorts for non-believers in countries where simply expressing doubt about religious belief is a criminal offense or where it may lead to grave physical harm.

"[24] Blumner addressed the 36th Session of the UN Human Rights Council in Geneva on September 20, 2017, following a surge in discrimination against atheists in Malaysia, bringing pressure to bear on the issue of freedom of conscience.