Ask HN: How to Break into Defense Industry?

Hey HN, I have an engineering background and have been working on hardware projects tangentially related to defense applications, with a hobbyist focus. I have a lot of interest in working for/contracting with a company in the Defense Industry, but aside from trying to join the army (?!?) I'm not sure how to get my foot in the door. Especially now since a lot of places don't seem to be hiring or taking on extra projects.

What would you advise someone in my position? Thanks!