Concealed Weapon permit?

ok I know you need a good reason to obtain a permit to carry arms but I am going to apply for an armored truck carrer with either brinks or dunbar or Garda... which either one, I will need special requirment to be hired on...so what is the whole process in getting this done??? i think i need to go to DPS of texas where i live but is this where i hav to get my permit to carry a weapon or will I hav to go through them to get it ???