Yeah, if you do get the second interview, bring up that you stutter in the beginning. Tell them it's normally rare and doesn't interfere with your work, just occasionally means it takes you a little longer to say something than others. (I know that's not how you described what really happens; doesn't matter: You just want to make it clear that it will not interfere with your work, which it won't.) I would try (I know it's hard) to not apologize if you do stutter.....you know, there's no reason to apologize and it can give the appearance that you think you're not up to things which I don't believe is the case at all. They may very well call you again. If you want to stick the word "disability" in there -- "it's a minor disability, but I don't let it get in my way" -- can't hurt. Government agencies are especially vulnerable to non-discrimination laws. I really hope this works out for you. But if not this, something else. The key is setting the tone yourself, you know, not just hoping you won't stutter. That's why it's good to say it up front, so that if it happens it's not as big a deal. I know you kind of have to fake some confidence, but if you can, that can turn into the real thing. You already know you you'd be good at the job; you're halfway there!