I think there is no sidebar on the employee page.
The employee page are not linked automatically from the siteorigin widget, you have to add employee link manually when you edit the employee page. Edit your employee page then scroll to the bottom of the page, you’ll see the “Employee link” field and you can put the permalink of the page on those employee link field.
If you meant that you want to add some element to the employee page is by using page builder, firstly you have to enable the pagebuilder options for the employee widget from: Dashboard > Settings > Genereal > Post type > then tick the “Employee” option http://prntscr.com/eyjr3k
Then go back to your employee page and start adding row + siteorigin widget to the page.