I don't work there but visit quite often. They have experimental test pilots - ie those that fly new designs to obtain certification etc.
They have production test pilots who fly the brand new aircraft on their first flights out of the factory, but those aircraft have a previously-tested modification state. I am not sure if these pilots have actually done the full test-pilot course.
Then they have instructors who teach customers how to fly their shiny new aircraft. EC does employ pilots elsewhere, eg I know of one EC-employed pilot who is based in Malaysia.
HC