This is the 1617th most frequent Turkish word.
sorumlusu
"Person in charge" or "responsible person."
Here, 'sorumlusu' identifies the person in charge or responsible for the given project.
Bu projenin sorumlusu Ahmet Bey'dir.
The person responsible for this project is Mr. Ahmet.
In this context, 'sorumlusu' describes the person who has managerial or overseeing duties for the specified department.
Sorumlusu olduğunuz bölümde yeni düzenlemeler yapılacak.
New regulations will be implemented in the department you are responsible for.
In this sentence, 'sorumlusu' refers to the individual held accountable or who had oversight for the shop in question.