The minimum diploma requirements, or qualifications required to sit an EU competition and become an EU official varies according to the type of competition - Assistant (AST) or Administrator (AD).
Generally, for Administrators, a university diploma of at least 3 years (Bachelor level) is the absolute minimum requirement. For Assistants in the AST1 (entry level), no diploma is required other than a high school or vocational school certificate (though for AST1 who have no specialised education, generally 3 years of work experience is needed). For AST3 level, a university diploma is not required if the candidate possesses a high school level education and 6 years of relevant work experience, otherwise a diploma is needed (usually in field that is relevant to the topic of the competition, e.g. project management or audit) with only 3 years of work experience.
Always consult the Notice of Competition for the official, up-to-date eligibility requirements for your competition.
All diplomas must be recognised by an EU member state's public authority.
See also:
Eligibility Criteria | Administrators | Assistants (AST) | Reserve List | EU Officials