Former SpecOps folks who are now civilians and work for one of the Alphabet Offices... primarily the CIA. The boys who defended our real estate in Benghazi fit this bill to a “T” because this it what they are.
When they are a kind of "contract support security" organization, no issues. But if they have morphed into an offensive organization for direct combat, that's wildly unconstitutional and an uncontrolled entity.
If you value freedom, it's a very bad idea to have a wildcat civilian force.