This is the enforcer for this racket. He is found in an offroad dumpsite as marked in the map, along with a considerable number of hostiles tightly clumped together. It will be moderately difficult to take them all out stealthily so if ever you go loud, target the sentry first. There will be limited cover for moderate or close engagements so if you want to snipe them from afar, that will work as well since there’s a lot of open space here. After clearing the area, loot the cash drops and the cash bag to get a lot of money.
There are also armed cleaners driving garbage trucks around the district. You can stop in front of them to engage them but chasing after them after fully damaging the racket is already pointless and risky because of the possibility that nearby witnesses may report the incident to the police.