Put what you wrote here, "We need a senior-level, generalist DBA that can work with three other entry- to mid-level DBAs to maintain a fairly large SQL database infrastructure and support a large developer team." right at the top of the posting. In bold if it'll support that. Heck, make it a few points larger (font size) than the rest of the post. It's PERFECT!

It expresses exactly what you need, why you need it, and what to expect. A posting with something like that, if I were looking, I'd jump on fast.

For those worried about the "rude or harsh" bit, that was me, and was quoting a caveate I put in one of my posts. Couldn't think of a more diplomatic way to efficiently, effectively say what I needed to say, so pre-appologized, and he quoted that.

But if it helped arrive at that statement about what's actually needed, was worth it.

As already mentioned, there may not be such in the area you're recruiting in, but if you're willing to help with moving expenses (some companies are, some aren't), and post that nationally, it'll have a much better chance of a postive response than the prior incarnations of the posting.