"Ai là chỉ huy của căn cứ này?"

Translation: Who is the commander of this base?

[wordgeek416]

chỉ huy 指揮

• Mandarin zhǐhuī
• Cantonese zi2 fai1
• Hakka (Sixian) chṳ́-fî
• Minnan chí-hui

căn cứ 根據

• Mandarin gēnjù
• Cantonese gan1 geoi3
• Hakka (Sixian) kîn-kí
• Minnan kin-kì/kun-kù

[RebeccaTsu]

I thought that chỉ huy is the verb meaning to command. In this sentence,
chỉ huy means commander, a noun. Why doesn't it need sự before it to show that it is a noun or would that make it mean the command?? Thank you.