How do I provide business unit access to HRM manager

Summary:

To provide access of all employee falling under 'Collection' department to HRM manager

Content (please ensure you mask any confidential information):

Hi Team,

We have an HRM manager for whom multiple HRM AORs are mapped for different departments and locations. Now, the business wants to grant this employee full access to all employees falling under the 'Collection' department, in addition to the regular employees for whom this person is already assigned as HRM.

We tried using a Person Security Profile and mapped it with the newly created AOR. Additionally, we assigned the security profile to map the created Person Security for Public and the Person for the role linked only to this HRM manager.