When you upload documents to an employee's profile, they can be added to either the Person or to the Employment folder.
When added to Person: the document is visible across all of that employee's employments.
When added to Employment: The document is only visible to that specific employment and doesn't carry over to other employments.
When a person has multiple employments, as long as the previous employment has not been removed from the system, the documents attached to that employment are still stored and are accessible.
The employee will need to click on their name in the top right corner of the screen and then select the employment to which the documents have been uploaded. They will then be able to access them in Self Service.