military training or body guard training is a lot more than just shooting a gun.

If they were someone who worked in that position, they would be hyper aware of their surroundings.

Ex-cops would know the way the law works.

Vets would know hand-to-hand, and how to survive in firefights.

Bodyguards know crowd control.

Longtime crooks would be able to read a situation.

I haven't read your CS, just throwing out potential skilz they would gather.