Took weeks to get a phone call after applying to the position. Went onsite for the interview. I was asked a few technical questions and some behavioral ones as well.
Basic interview process for an Engineering position, nothing out of the ordinary. However, the need to have a security clearance causes the hiring process to take months and months. Be prepared to wait for extended periods of time before the actual onboarding starts.
It was an average/typical interview. There was not anything unexpected. The whole interview process did take awhile. You just have to be prepared to hurry up and wait. I would imagine with any large company there is alot of dead time in between.