Hi,

I am a Junior Administrator at my company. At my company, we have a number of developers that are local administrators on their machines. Our developers have the ability to change the UAC settings on their machines, and that compromises our security. 

I have been researching how to restrict UAC settings via Group Policy, but everything I have read only works on users that do not have local administrator privileges. 

My question is: Is there a way to lock down UAC settings for local administrators? If so, how can I do this?

No - the very fact that they are local administrators mean they can bypass any Group Policy setting you configure.

So you are saying there is no way to restrict local admins from changing UAC settings at all?