See attached file for all details about the position.
Mandatory requirements:

1) 5 years of proven experience.
2) In possession of Belgian nationality
3) In possession of a “top secret” security clearance or, if not, willing to obtain one.
4) All work must be performed at the VSSE. There is no possibility for working from home
5) Dutch-speaking or French-speaking with a good knowledge of the other national language (Dutch or French) and of English