noun, noun or participle which takes 'suru', transitive verb
concurrent post; serving concurrently; holding an additional position
Used for holding two or more official positions or roles at the same time, often in business, government, or organizational contexts. Functions as both a noun and a suru-verb.
彼は社長と会長を兼務している。
He serves concurrently as president and chairman.
来月から営業部
From next month I will also hold the post of sales department manager.
noun
additional post; concurrent position
Refers to the extra role itself, rather than the act of holding it. Often used in phrases like 兼務を解かれる (be relieved of one's additional post).
その兼務は来月で終わる予定だ。
That additional post is scheduled to end next month.