Is there a way to make one person responsible for reviewing, editing and posting grades?

 My issue is that I have an administrator that gets and email from teachers that says grades are ready for review. At that point the Administrator goes in and reviews the grades, skills and comments. She would like to edit their comments if they have any, and then change the status to Ready. At that point she would like to post the grades herself.

I have changed her settings numerous times but can not seem to get her to be able to do all three things herself.