Is it anybody from any country?
Is there any rank range?
Is it by lenght of participation period?
Is there any qualification?
What are the criteria for being a BitcoinTalk forum, admin or moderator?
theymos only choose who will be Moderator or an Global Moderator !
As i know there was no Admin named the last years as the only Admins are theymos and Cyrus.
For sure the criterias are that you helpful to all Users , helping the forum to be better and i guess that you are neutral and hold on the forum rules.
But as i said only theymos decides who get the Role of an Local Moderator or an Global Modeerator .