You don't have to support the philosophical ideals of a place to work there, as long as you're able to do your job and not be disruptive. I don't see why a creation museum would be worried about the religious views of the guy who wants to sweep the floors or stand guard at night. I suppose they might be concerned that their IT personnel could abuse their access and control if they were ideologically opposed to such a place, but there are laws designed to deal with that sort of misbehavior. And of course nothing stops those lawless atheists from pretending to be true believers in order to wreak havoc!
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould