This is the 12477th most frequent Korean word.
당직자의
"당직자의" means "of the person on duty" or "of the on-duty staff."
In this sentence, '당직자의' (person on duty's) acts as a possessive form attributing responsibility to the individual designated as on duty.
당직자의 책임은 매우 중요합니다.
The responsibility of the person on duty is very important.
Here, '당직자의' (person on duty's) describes the location by specifying the office associated with the individual on duty.
회의는 오늘 밤 당직자의 사무실에서 열립니다.
The meeting will be held tonight in the office of the person on duty.
This usage emphasizes the decision-making aspect directly linked to the individual fulfilling the duty role.