Northrop Grumman interview questions

I had a first phone interview with 2 technical managers for the position I applied for. It went great, they asked great questions and overall I had a good impression of them and the team. A 3rd manager(?) over this position couldn't make the phone interview and reached out to me separately to set up a 1:1 phone call. He accepted a time/date to call, and then flaked without notice. He reached out the following day trying to reschedule, but I declined.

It was pretty straightforward, the interviewer explained the role, conducted a STAR interview, was pretty transparent with their answers after all my questions about the company and it’s onboarding and the company’s culture