Noun and する verb
こよう
かつては多くの会社が終身雇用を保障していましたが、今ではそれが当たり前では無くなっています。
Many companies used to guarantee their workers a job for life, but that’s no longer a common thing.
The employ task is employment.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.