Check the job posting. If it's like the usual ones, it asks for a full set of skills that have nothing to do with being a DBA, as well as decades of experience with SQL Server 2012, and all that kind of thing.

It will also depend on what market you're in, and whether you're willing to pay (or at least help with) moving expenses if the best candidates live outside normal commute distance from you. Some cities have a lot of good DBAs, some don't, and this varies over time as well.

Also, keep in mind that skilled Lead DBAs are probably already working. It's a high-demand field with unemployment around 1% nationally (if you're in the US; I don't know numbers from other countries if you're not). So, not only do you need to find someone good, but you need to find someone good who's looking, or whom you can convince to leave a current employer/contract.

You might also want to get a good marketing copy-writer to look over your job posting and make sure it follows good marketing practices. I've seen dismal results turn into great results by doing that kind of thing (works on both job postings and resumes to treat them as marketing material). Doesn't have to be flashy, but does have to read in such a way that it will generate interest/excitement in the right target-demographic.