How to write EL Expression for Announcements Feature?

Summary:

I am looking for assistance in writing EL Expressions in the Announcements Feature. My intention is to be able to select specific audiences for our company announcements, for example, Site HR, Line Managers, all employees, etc. using Security Roles.

Content (please ensure you mask any confidential information):

I am looking for assistance in writing EL Expressions in the Announcements Feature. My intention is to be able to select specific audiences for our company announcements, for example, Site HR, Line Managers, all employees, etc. using Security Roles.

Here are examples of our Security Roles:

Site HR: GCGC_SITE_HR_V2_DATA