The interview consisted of just one phone interview, asking about my past experience in the field. All in all lasted about 30 minutes, but took about 5 weeks after applying to actually get a call. Got an offer about a week later. Due to the fact that you need a security clearance for their positions, they do hire a year in advance, so keep that in mind when applying for the job. Overall, the interview process was pleasant, but I had to decline due to how far out the actual dates of the internship were.