I'm active in quite a few Discord servers, but the below lists which ones I'm most active in. I am in many other Discords, but I am not as active outside of these ones. Keep an eye out for ExaltedSlayer#0001
SecurityNewbs is a server dedicated to helping new entrants to the field. I am an early member of the server and helped build it up.
Cooey COE is a server dedicated to the Defense Industrial Base (DIB) and helping with a variety of complianc and technical issues within the DIB. It focuses heavily on NIST 800-171, NIST 800-53, Cybersecurity Maturity Model Certification (CMMC), FedRAMP, and other such compliance issues.
TrustedSec is more of a general Cybersecurity server. Just all around a great server with lots of extremely knowledgeable folks.
Cybrary User Community
No invite will be posted for this one yet. This is a server dedicated to the Cybrary User Community. It is currently limited to paying users of Cybrary, but will be opened up to the public in the future. At that time I will add an invite link.
This is a discord that primarily is for the users of Skiff. Skiff is an end-to-end encrypted word processor, and recently introduced an end-to-end encrypted email system.