Allow group members to add users to a specific group

[MadMorbius]

I don't know if there's something native to accomplish this, but one of the forums I'm working with has a a group of staff members that are tasked with performing physical ID verification checks in order to grant a member access to the classified ads. The current process has the age verifiers (AVer's group) posting a member's username in a specific thread once ID has been verified. Admins then have to go through the list and edit each verified member's profile to add them to another group, which grants access to the classifieds.

What I'd prefer to see is a mod that allows members of the AV'ers group to add verified members to the Age Verified group directly, thus removing the bottleneck.

Thoughts?