Her specializations are the work of Piet Mondrian, the relationship between art and Western Esotericism, especially Modern Theosophy and Anthroposophy, and Nazi plunder of books during the Second World War.

[1] Bax is the sister of the human rights activist Robert van Voren and of Jacky Bax, programme manager and deputy director at NRPO SIA / Taskforce for Applied Research, formerly Programme Manager Innovation Universities at Ministry of Education, Culture and Science.

In 2001 she was co-founder of the Stichting ter bevordering van wetenschappelijk Onderzoek naar de geschiedenis van de Vrijmetselarij en verwante stromingen in Nederland (OVN; Foundation for the advancement of academic research into the history of freemasonry and related currents in the Netherlands) to preserve archival and architectural heritage.

In 2010 Bax made the full membership list of the Theosophical Society available online as a primary source for scholarly and family research.

Bax contributed to the 2013 exhibition and conference in Stockholm,[20][9] but is critical of the myth created around Hilma af Klint.

She focuses on Anna Cassel as the inspirational and creative source of De Fem, and on the broader historical and religious context of the group.

[21][22][23] From 2020 Bax has been contracted by the Claims Conference to research the plunder of books and archives in The Netherlands during the Second World War by the Reichsleiter Rosenberg Taskforce (ERR).

[24] Millions of books and archives were looted, displaced or destroyed, not only of Jews, the main focus of the plunder, but also of all Dutch religious, esoteric, humanitarian and socially or politically oriented organizations and groups deemed 'subversive' by the Nazis.