There is no mention of Job having any other job besides being a "man of great wealth" (Job 1:3). He is described as having "seven thousand sheep, three thousand camels, five hundred yoke of oxen, and five hundred she-asses" (Job 1:3), indicating significant wealth and likely a role as a landowner and livestock owner.
While he is not explicitly described as a poet or composer, his famous speeches and dialogues within the Book of Job display exceptional eloquence and poetic skills.
Therefore, while he is not known to have any specific occupation other than being a wealthy landowner, his eloquence and the poetic nature of his pronouncements suggest a deep understanding of language and a natural talent for expression.