This is the 14700th most frequent German word.
nebenamtliche
"Nebenamtliche" means "part-time" or "secondary employment."
The word 'nebenamtliche' here describes a supplementary job or position held alongside the primary role.
Ich habe eine nebenamtliche Tätigkeit als Dozent.
I have an additional part-time position as a lecturer.
The word 'nebenamtlich' is used as an adverb to indicate that Marie's work at the library is secondary or supplemental to her primary job.
Marie arbeitet nebenamtlich in der Bibliothek.
Marie works part-time in the library alongside her main job.
The word 'nebenamtliche' modifies 'Aufgaben' to specify that the tasks are outside the primary scope of official duties.