Hi,
Have you enabled the system members in your Request object , at the time of request creation by a user?
I will link this question: https://forum.mendix.com/link/space/studio-pro/questions/108550 because it contains relevant discussion on this topic.
Because it seems you are trying to do the same thing. So to get the immediate result you have to make the user who has done the request be manageable by the officer. (In app security → user roles)
What i would personally do is, create an association between the request and the requestor if possible when the requestor creates the request, show that association in the data grid with the name on it. Then ake sure that the officer has access to the Requestor.name attribute.