(This question may be off-topic, and better suited for Academia.SE. I think it is helpful to German language learners, but I'll understand if it's closed.)
I'm pursuing a move to Germany in the coming years. I am currently a music professor in the United States.
I see on the Goethe Certificate summary that a C2 level allows admission into every Hochschule in Germany. Many accept C1 students, and many music schools accept B2 students (see pp. 4, 5, and 7).
This is one of several documents showing the levels for potential students, but I can find no such information for potential job applicants.
Obviously the more fluent the better, and I'm sure different universities will have different requirements. (And, like with students, I'm sure a C2 level would be a universally acknowledged acceptable level.) But I'm asking if there is any universal standard that I haven't yet found.
I'm assuming that such a certification would be necessary to have a successful application, and that publishing in German and interviewing in German may not be enough from a legal standpoint.