Go to the "People" tab at the top of the page. Once you are on the people page, select the three dots at the top right of the page.
From here you will select "View Archive" from the dropdown menu.
This will take you to a new page where you will be able to see employee, agency, and admin profiles that have been archived in the past. Find the person you would like to put back in your account and hit the “Unarchive” button to the far right of their name.