Judges need a login account, but do not need to be a member of any organization.
Judges do not need to be members.
Judges must have a Visual Pursuits login from any organization, even without being a member anywhere. The login is used to identify the judge.
Judges are assigned to competition using their email address that was used when they created their login account.
When a judge is assigned to a competition, the judge is assigned a role of "Judge" and they will be able to see the "Judge" menu item. That menu is hidden for normal members. The Judge role does not provide any permissions, other than judging specific competitions assigned to that judge.