Neat rank names. Nice systematic insignia. I've been kicking around the idea of using police-sounding ranks as part of a military force. How did you decide which police sounding ranks align with which OF level? It's a similar issue that Marc had in adopting modern Quebec police uniform to an independent Quebec military.
The premise of mine was that NASA and other space exploration adopt uniforms for ease of transfers from military personnel, while emphasizing using civilian sounding rank names to emphasize that they are peaceful. I was thinking that maybe one branch would be the TSA-like organization that uses police ranks. Eventually their mission to patrol launch sites and inspect launch materials evolves into inspecting things in orbit, and once war breaks out, they become a real military. I see that you are using police like ranks for a very different thematic reason, because you're emphasizing that this is a dystopia where the National Guard is a paramilitary force that's involved in policing.
I just looked at a bunch of OTL police rank systems, picked the names I wanted and just mixed and matched until I got the combination I liked