If you want to integrate the Job feature on your business page, Install and activate the WP Job Manager plugin.
Then navigate to WB Plugins > BP Business Page > Integration, and enable the setting WP Job Manager Integration.
Once this option is enabled, You’ll get a Jobs tab on your business page.
Now Click the “Create a Job” link to create a new job.
Once this button is clicked, You’ll be redirected to the job publish form.
Fill all the details. Choose the business in which you want to publish the job and submit it.