Lockheed Martin System Engineer interview questions

Cold call phone screen with a lot of technical questions from hiring manager. Wait a week. Phone call from recruiter setting up in-person interview about a week later. In-person interview, starting with detailed description of job, a few technical and experiential questions about my background experience and then a role-playing session to see how I would react to different situations. Wait two weeks. Call from recruiter and FedEx offer letter. Counter. Wait a week. Response. Accept. Drug test, credit check, background check. Start two weeks later.