noun which may take the genitive case particle 'no'
job-related; operational; business
Used as a no-adjective to describe something related to one's work or business operations.
これは業務上の秘密です。
This is a business secret.
adverb
in the course of one's work
Adverbial use indicating that something happens while performing one's job duties.
業務上、個人情報を取り扱うことがあります。
In the course of work, we may handle personal information.