Sietar NL is an association where all activities are performed by volunteers. Every year a General Members Meeting is organised by the Board, in which all important decisions are taken. There is a volunteer handbook to familiarise all new members. Expenses occurred by volunteers can be reimbursed.

Honorary Members

- Mieke Janssen-Matthes  †

- Geert Hofstede  †

- Frank Oomkes

- Hedy d’Ancona

- Jacqueline Franssens

- Jan Gijn

- Jan Hoogewerff

- Nel Jessurun

- Yvonne Verhoeff