To be totally honest? It's unclear at the moment. All we know is that it's a mysterious organisation with enough funds to outfit several outposts around the country with supplies. When a certain someone (*cough* Michael Langdon *cough*) visits Ms. Venable's location, he mentions that all of the other Outposts have been overrun with desperate, radiation-poisoned people who weren't lucky enough to gain access to an Outpost after the bomb was dropped. He also says that there's another, larger Outpost that has enough food to last "a decade," so he needs to figure out which one of Venable's survivors are worthy.