Hello andrijander:
as you may know, in Spain the system is different from Eurocontrol´s:
to apply for the job, you need to have completed at least 3 years of any university carreer. The first filter is in the selection por the candidates:
for example, 8500 applied for 150 positions at the control school at SENASA. That is a 1,76 % success rate. Once at the school, another 1% are expeled before completing the 20 month formation.
Saludos!