EUROCONTROL is an established consultancy in the security sector.
The company is currently hiring in Madrid. Just now, there is one unstaffed position from EUROCONTROL to be found on Jobspotting.
Some more web resources for you: Twitter and Google Plus provide a lot of useful information about EUROCONTROL. Make sure to read through before applying. If you haven't already, make sure to visit EUROCONTROL's website for more information.