If you want to work in or at the airport, in many cases you will first have to undergo a background check by the relevant authority. This check is a basic requirement for obtaining access authorization.
If you want to work in secure areas of an airport, you will need access authorization. This includes, for example, an airport ID card and a positive background check. In addition, various training courses are required.
If you would like to have proof of certification issued for your aviation security controller or security personnel, you can apply for this at your aviation security authority.