IF you can get in as a bona fide NATS employee, then you will discover that you have significant advantages whilst at the college (For a start, you'll stay on the same salary) (Better that than going in as a temp)
Geting a job as an ATSA with NATS would be a good start, as you'll learn lots of really useful stuff 'by osmosis' and in the event that it all goes to pot, you are unlikely to get the heave - ho.
Good luck
PS All ATCOS mistrust Admin