Oddly, I recall seeing a small building project in Johnstown, PA with a sign ‘future site of (something branch) of Northrup Grumman.’
Hmmmm...wonder how that got there???
Northrop Grumman built a National Workforce Center at Johnstown. They have a number of them across the country. I selected a few states at their web site and they had job openings everywhere I happened to click, except Montana and apparently they do have operations in that state. It’s a big, big company.