How to become a beer judge in US?

Dear homebrew friends,
If I want to be a judge in a homebrewing competition or an event, I need to have the judge certification/qualification first. But how can I get it?
Based on my search, I know that the judge ranks like this:


And if I would like to be a judge of a homebrewing competition or an event, which rank should I have?
Any one can offer some help, guide or tips?
Thank all!