Hi, my Minecraft username is Dr_M_Blocks and I love the DMU server really much and enjoy every second of it and I think that I would like to be something bigger and part of the SWDteam and server so my question is how do you become/apply to be a staff member/admin? 

You can apply here. Please note that IF you get accepted, you won't be instant admin, but trainee. And atm we don't really look at applications, because we got a big staff team atm.