This is the 9965th most frequent Korean word.
공무원에게
"To a public official" or "to a civil servant."
In this sentence, '공무원에게' is used to indicate the recipient ('to the civil servant') in the action of submitting documents.
공무원에게 서류를 제출해야 합니다.
I need to submit the documents to the civil servant.
Here, '공무원에게' is used as the target of the inquiry ('to the civil servant').
그 사건에 대해 공무원에게 질문을 했습니다.
I asked the civil servant a question about that event.
In this example, '공무원에게' is functioning as the entity receiving the explanation ('to the civil servant').