As of today, I'm now certified to deliver the Offline Assessment of Active Directory Security (OAADS). This is a service available to Microsoft Premier customers that focuses on identifying many of the common technical, policy, and operational security gaps in an Active Directory Environment.
The ramp for this certification was fantastic. My historic focus has been on Linux and application security. With that background, it was fairly intimidating to sit in the class where half of the students were MCMs. The same security principles apply across technologies though, so it went well. The lateral movement work we touched particularly eye opening.
Lets go tighten down some AD!