There's some info on the CTC website on obtaining an airside pass (you must be able to get one of these to work for an airline).
http://www.ctcaviation.com/wings/faq.htm
I think after a certain amount of time you don't have to declare it to an employer, but you'll have to check of course.
There's some more info on:
http://www.disclosurescotland.com/airside.htm
Biscuit