www.minecraftsurvivalgames.com/forums/apply
Be sure to answer every question as detailed as possible. Also remember to use correct grammar and whatnot.
If the senior staff like your application, they'll put it into the 'pending' section for the rest of the senior staff and administration to see. If the rest of them like it, you'll be giving 'interview', or 'waiting'.
After that, just connect to the Teamspeak (ts.mcgamer.net) and ask for your waiting rank.
Once the senior staff have decided to do interviews, be sure you're ready, have a glass of water next to you, and get ready for your interview!
But remember; most likely you will NOT get accepted on your first try, but that doesn't mean you should give up! It took me 4 tries before I got accepted for moderator, and it may take you less, or even more.