Developers with a year or more of SQL Server programming experience who’ve decided they want to focus on SQL Server instead of development. They’ve written code that stores data in SQL Server, so they know the basics of T-SQL or LINQ, understand the basics of data models, and maybe they’ve even done a little SQL Server administration on their dev boxes.
Windows administrators with a year or more of Windows experience who also want to switch their focus. These people know hardware, know the basics of performance tuning, have backup/restore experience, and maybe they’ve even built a cluster or two. They might have even built SQL Servers, but they haven’t been working on SQL Server full time.