I find the last comment quite interessting, because if consider that the ATCO license is "valid" internationally but actually if you apply in some countries (in Europe) it's almost impossible to get in. For example I got a ADI, APS rating plus i speak Italian (mother tongue) but I couldn't have any changes to get in Italy and work in a major airport to get a "new experience". I find this a bit sad and for sure not European mind set, in other terms I mean that aviation it's trying to standaraize everything (english level, phrasology, training, medical) but when we got finally that license, we can move pratically only inside or move in the Far East/Middle East or Africa (maybe). Why?