[noun] being hired by administrativebody named with 庁(chō) (東京都庁(Tōkyō Tochō, “Tokyo Metropolitan Government Building”), 文化庁(Bunkachō, “Agency for Cultural Affairs”) and so on)
[verb] to be hired by administrative body named with 庁(chō)
(This term, にゅうちょう(nyūchō), is the hiragana spelling of the above terms.)