These type of positions are usually very high end. A friend did this kind of thing and his pay was well north of $200k per year almost ten years ago flying a single pilot jet, he was and still is the rare Tier 1 operator with no military specops or LE SWAT background. He also spent a lot of time at government contractor gigs. It was more of a single pilot operation and PSD position, he had been federally deputized so he could carry firearms everywhere.

Yes those people really exist, and no, he did not pick up the drycleaning or kids at school.