Learn to walk before you run Patrick.
The Harmonised European ATC Licence is supposed to give anyone who is a licenced ATCO and who is also an EEC National the right to work in any other EEC country.
Fine theory, and indeed, I know that there have been a number of non UK Nationals applying for jobs in the UK, but I can't see any country going out of it's way to employ a non - national when they will almost never have a shortage of willing and suitable trainees in their own state.