German as a Second and Foreign Language for Work and Specialised Studies

["a researcher in German as Second Language / Foreign Language at a university in Germany or overseas,", "a head of department for German as Second Language / Foreign Language at an adult education institution,", "a teacher in German as a Foreign Language at a non-German university for prospective engineers,", "a German language teacher in healthcare settings in a non-German-speaking country,", "or a staff member developing teaching materials for a publishing house,"]