I was a member of a GRW task force consisting of folks who preferred to play more milsim but none of them are playing anymore. What's funny is that I found more people in Europe and GB that liked playing this way than here in the States.
I few of my friends are retired LEO or military but like me, we haven't played in a while.
You might want to expand your reach beyond service backgrounds. There are a lot of regular folks who dig this sort of experience. Of course I can understand if you're just looking to find those who share this commonality. .....I typically will only befriend those who are over 30 or closer to my age (50s). Nothing wrong with that.
Hope you can muster a group to play with. Might want to check Ghost Recon Network to see if you can locate an active Task Force that shares your criteria. Another option is to try the PSN Community feature and browse those. IIRC, there was a LEO community I belonged to on there (Communities) but it wasn't very active.
....good luck.