A Pit of Paranoia

Follow the chopper until it reaches a trailer park. Get close enough to hack the chopper and use its mounted camera to find the new security chief. Be careful not to accidentally detonate explosives or overload junctions since any explosions will blow your cover. Once the targets are found and marked, you got to infiltrate the restricted are and take out the security chiefs. When moving around, you have to be careful since the roving helicopter can also see you. You can drive it away by attacking the sniper and the chopper. Once the chopper is out, you're free to take out the targets as you see fit.

More reinforcements will arrive. If you alerted the enemies and managed to take out one of the security chiefs and hack his phone, the other may find a vehicle and attempt to escape. When this happens, quickly find a fast vehicle of your own and chase after him. Force him off the road and kill him, as well as your other pursuers. You can save yourself for this chase by sneaking inside the compound and taking out the chiefs stealthily. The mission will be complete once you've dealt with the threat, the mission will be complete.