If you're interested in becoming a GM, visit the "Now Hiring
" page on the forums. There's no remote work, GM-ship though so you'll have to be able to commute to the Aeria offices in either Santa Clara, California or Berlin, Germany.
If you're interested in becoming a Community Volunteer "Game Sage" then please read the Current Wolfteam Game Sage List
and scroll down to the Game Sage FAQ where the process is explained.