I applied online. The process took 6 weeks. I interviewed at Northrop Grumman (Baltimore, MD) in Aug 2017
Interview
Basic interview process. Why are you a fit, tell me about prior experiences... no questions that throw you for a loop. Apply - Hire time quite lengthy, understandably. Just keep your recruiter updated and check in every 1-2 weeks. Very nice recruiting staff. This was 1 on 1 interview, but other departments may differ.