I don’t know what Northrop Grumman is going to do to the culture you admire. Best hopes, but hard to predict whether NGC will strike a balance between being sufficiently supportive and sufficiently hands off.
I figure that NorthopGrumman bought them mostly because of the culture. NGC has been a part owner for years, and often increases their share in held companies as necessary to provide funds for tooling, hiring, and research. That makes their share worth a lot more.
NGC also has a fair number of resources (former TRW rocketeers, even retired Grumman Lunar Lander folks, that they can call in as consultants.