I've created a 36 second YouTube Short guide showing how to get the Brute Force achievement by killing a brute. The first Brute you encounter in the game is in Chapter 4: Obliteration Imminent. This is an unmissable encounter, and you pretty much have to kill the brute to progress.
As far as I can tell there are 2 great methods to killing a Brute. Stasis and take the arms off at the shoulder joints, or stasis and shoot the orange spots on the brute's back.
https://youtube.com/shorts/ZhV5PsMlr0o?feature=share