Janneke completed the college degree in Office Management at Schoevers in Eindhoven. In 2005, she began as a management assistant at an international trading company in Helmond. Because she always maintained an interest in legal affairs, in 2008, she decided to begin part-time studies in law at Radboud University in Nijmegen. While pursuing this programme, she took a position as a legal secretary at a firm of attorneys and civil-law notaries in Eindhoven. She completed her legal studies in 2017.
Since January 2015, she has been a management assistant at LXA Attorneys. Her work is primarily focused on the support of the anti-counterfeit practice.