Qualifications improve your chances; they do not gate the job. Level 6 is the most recognised.
Level 6 most recognisedOpen entry
Your route in
You can start without qualifications - direct entry/volunteering; a qualification improves your chances
1
Qualifications employers recognise (Level 6)
Any of these strengthens your application.
2
Where this can take you
With experience, you could: move into the co-ordination and management of interpreting services, specialise in a particular field, such as legal, medical or diplomatic work, set up your own interpreting agency in the public or private sector and work freelance and combine interpreting with training others.