It sounds like you’re perfectly qualified for the job – it’s just that it’s a highly competative position.
I usually reccomend people attending the job fair if they want a job down here (April-ish in Denver). The info is for jobs is at http://www.polar.org Actually, I think they’re disbanding that site and replacing it with http://www.usap.gov – – either way, look for the job fair postings. At the job fair, the line for recreation is always the longest line there, and you wonder if they ever remember your face. Get in touch with the hiring manager (I’m not sure exactly who that is right now) and make sure they know who you are, why you’re qualified… remind them often. Or, come down working a different job, and go schmooze in rec, so you can get a job there the 2nd year.