PNN (Promovendi Network Netherlands): Promovendi Netwerk Nederland (PNN) is the national interest organization for and by PhD candidates affiliated with one of the Dutch universities, university medical centers or research institutes.
LNVH: Dutch Network of Women professors (Landelijke network voor vrouwelijke hoogleraren) - offers amongst others grants, career training and mentorship programs.
Labour unions for PhDs:
AOb: 80% of the members in the sector Scientific Education and Research at the AOb belong to academic staff, including PhD candidates, which means that there is a lot of substantive expertise within the AOb.