に任命された

was appointed to

→ に
phrase Uncommon #15,770
was appointed to に marks the position or role someone is appointed to.
JA: 彼女は委員長に任命された。
EN: She was appointed chairperson.

兄弟が枢機卿に任命された

My brother was appointed a cardinal.

— 教皇選挙 (2024)

まもなく彼は教授に任命された。

He was appointed professor shortly thereafter.

彼は責任ある地位に任命された。

He was appointed to a position of responsibility.

ブラウン氏が重役に任命されたことに我々はみんな驚いた。

We were all surprised that Mr. Brown had been appointed as an executive.

私は課長に任命された。

I was appointed section chief.