You make a pretty glaring assumption in the post: that all "conservatives" are religious (specifically Christian). I live in CA, too, but I have lived in very progressive pockets and very conservative pockets.

Further, it might be helpful to stop grouping everyone/thing into such narrow binaries. The world is more complicated than "liberal" and "conservative."

That being said, I think you are correct in your understanding of vocation--that is, that you are serving God through your secular work, and that is (at least presently) your "calling" and how you serve God.