The application process is pretty rigorous, as are all security clearance positions. After you complete your initial application package, you will be contacted for a phone interview. My phone interview was actually pretty brief - they already knew they wanted me and just wanted to verify that I was still interested in the position. Of course, I said yes. The security clearance paperwork following the interview was the most tedious - you really need to know every place you've ever lived at and the dates, etc., as well as everywhere outside of the U.S. that you have travelled, the dates, whom you were with, etc.