This is the 8312th most frequent Turkish word.
müdürlüğünde
"In the directorship" or "under the directorship."
Here, 'müdürlüğünde' indicates the location or department where Ahmet works, specifically the management division of the city library.
Ahmet, şehir kütüphanesinin müdürlüğünde çalışıyor.
Ahmet works at the management of the city library.
In this context, 'müdürlüğünde' denotes a specific place—the management office—where the task was accomplished.
Görevini müdürlüğünde başarıyla tamamladı.
He successfully completed his task in the management office.
The word 'müdürlüğünde' here references the department or office of management within the company where the meeting was held.