Grammar help?

I'm searching for a word that means "military-like", as in "my boss runs a very serious, "military-like" office."

I'm not sure if "militaristic" would work, as that usually pertains to actual focus on a military, as to where I'm just trying to embody the strictness and structure of the military in an everyday setting.

I also considered "militarian" which seems to have some definitions that are similar to what I'm looking for, but isn't actually in the Merriam-Webster Dictionary. I don't want to use a word that isn't universally accepted.

Should I go with either of those words or is there another word that I'm completely missing that fits into what I'm trying to convey?