2007: Board member, Jeugdbond voor Natuur- en Milieustudie, Amsterdam
2002–2011: nature guide and organising camps, Jeugdbond voor Natuur- en Milieustudie, Amsterdam
participated and (co) organised 100+ weekend- and summer camps as nature guide in the areas of sea life, birds, butterflies and dragonflies, as well as various other functions such as overall supervisor, treasurer and cook.
2007–2009: Course leader, Stichting Onderwaterbiologie, Groningen
Organising introductory courses in marine biology for SCUBA divers and dive clubs. Lectures, dives and practicals on identification.
2005–2009: Various functions, Groninger Biologen Duik Vereniging Calamari, Groningen
A local diving club. Organising camps, teaching theory and practice of diving. Functions including Board Member, Instructor and Course Leader.
2004–2005: Editor, Vrije Vogels, Zeist
Writing and editing contributions for a magazine of the Dutch branch of BirdLife International