Educated in Marketing Management, followed by work experience in the Advertising & Design, Finance, Notary & Legal service branch as well at the Ministry of Defence, Royal Netherlands Navy/Admiralty, Directorate Naval Construction in the Hague (1982-1995).
Dendrology through autodidactic teaching and research (1998-2025). Presentations & lectures (2004-2020) as Chair (2006-2012) of Dendrology courses, Leiden.
Educated Nature/ field biology Guide of the Royal Dutch Natural History Society for field biology (KNNV/IVN) (2007), specialism in dendrology.
Wool craft designer & Founder of Wool craft business (2010-2020).
Faculty of Science, Biology at Leiden University, the Netherlands, Assistant associate professor, Biodiversity Animal (invertebrates) (2009-2019).
Trained professional in the field of toxicology, knowledge through on-the-job research (2015-2025). Staff member & Research team ToxicoWatch Foundation, (2015-2025).
CEO & co-Founder ToxicoWatch Consultancy (2017-2025).