Adding AD security groups via policy

What do you mean by add a security group? You can run dsconfigad to give a group admin rights, if that is what you want. It doesn't have to be run at the time the system is bound, it can be added later.

@alexjdale We have a group of Techs that need to be administrators on a Mac. A lot of our Macs are missing this and I want to use a policy or configuration profile to essentially push an AD group to all the Macs.

dsconfigad -groups "DOMAINAD GROUP"

You can do so, the problem is that it requires AD Admin creds in order to run. These credentials shouldn't be stored within a script, so if you were to do this you would need to create a Jamf Buddy prompt for credentials that could be passed to a variable. This page has some options, but I haven't gotten around to creating and posting a solution that doesn't store credentials in plain text:

https://www.jamf.com/jamf-nation/discussions/9742/active-directory-add-computer-name-to-security-group-after-ad-bind

There's no reason this should require AD admin creds to run. You're just making a change to the local dsconfigad settings, local admin is all that is necessary. The bind itself isn't being touched, so no need for domain access.

I missed OP's follow-up that this was for local admin. That is correct, local admin is all that is necessary. My answer was regarding adding Mac Computer Objects to AD Security Groups.