The qualifications you need:

This programme is aimed at recent graduates from university or higher technical institutes seeking further training in a wide area of projects. In order to qualify for the programme the following applies:

• You are a Spanish national.
• You hold a Masters degree (“ingeniero superior” or “master”) or are about to obtain it (you are expected to have your Masters when starting your contract) in the field of mechanical, electrical, electronic or computing engineering, applied physics or equivalent.
• You have no more than 4 years’ experience following completion of your last degree.
• You have not previously worked at CERN for more than 14 months.

More info:

https://careers.smartrecruiters.com/CERN/ftec