My atheism is the result of a methodological choice. It is a consequence of my epistemology. Given what I think counts as good practices what counts as good evidence and good argument atheism is the only way I can imagine things to be.
It isn't a stand alone belief, it doesn't do any work. I don't believe other things because I'm an atheist. If somehow you made me believe in the divine, none of my other beliefs would have to change.