[2] Born in Uccle, Eggerickx studied at the University of Ghent gaining a degree in Moral Sciences, and became a teacher of non-confessional ethics.

[1] While studying to become a teacher of "non-confessional (secular) ethics" she became a member of the Dutch Humanist association, Humanistisch Verbond (HV).

"[2] Following the Charlie Hebdo shooting, Eggerickx, in her role as president of the IHEU, worked to promote a campaign against blasphemy laws in which the IHEU and the European Humanist Federation aim to support organisations involved in the defence of free speech, against persecution in countries with religious minorities and those working against punitive blasphemy laws.

[9] She has also spoken out against the treatment of prisoners of conscience as a result of blasphemy laws such as Raif Badawi and Asif Mohiuddin, calling Badawi's treatment "sickening" and a "gratuitous, violent sentence,"[9][10] and suggested laws which prevent criticism of religious institutions "is one reason why sexual abuse in the Catholic Church persisted so long.

[18][19] Eggerickx was also involved in launching The Freedom of Thought Report, published annually since 2012 on International Human Rights Day, which examines the treatment of non-religious people, atheists and freethinkers across the member states of the United Nations.