Anonymous wrote:OP, the SES is about management -- in theory, SESs should be managers able to move to any agency regardless of subject matter, although in practice they do tend to have some expertise or experience with one agency. If you are a manager (there are lots of GS-14 managers in field offices, for example) you have a shot. If you have no managerial experience then it is going to be difficult even if you were a GS-15.
Some agencies have SES development programs, and that may be a good place for you to start. Go to USAJobs and search for "Candidate Development Program." Many of them require you to have GS-15 "or equivalent" experience, so you'll have to demonstrate that.
Good luck!
I am at a research agency. If you want an SES position where I work, you have to have gone through the SES development program or be a top scholar from outside of government with some management experience.