Jean-Denis Lejeune

Lejeune was one of the leaders of a massive protest march (the "White March") of an estimated 300,000 people in Brussels, on 20 October 1996, in which demands were made for reforms of Belgium's police and justice system.

Since 2005, Lejeune has been working with Claude Lelièvre, the Commissioner for Children Rights of the French (i.e. French-speaking) Community of Belgium.

[4] Lejeune became an advisor on energy and environment in the department of Belgian State Secretary Melchior Wathelet (the younger).

Most notably Objectif Ô, an NGO which aims to provide drinking water in developing countries.

Objectif Ô is not recognised by the Belgian government, so it can not make claim to grants.