You can apply directly to become an air accident investigator.
If you want to work as an operations inspector, managing an accident response team, you’ll need a pilot’s licence and flying experience.
To be an engineering investigator or flight data recorder inspector, you’ll need a relevant degree or postgraduate qualification and several years’ recent experience in aerospace engineering.
You can also take short courses in accident investigation techniques, which may help broaden your knowledge of the role and skills required.