Any class can actually hack, you will have to attach the Stun gun (under secondary). First down an enemy and data hack their body. After a successful data hack enemies will be highlighted in red. Use the Coordination System to create a path to the nearest enemy. This is done by holding , hold UP on the , you will see a small section on the top of the action wheel with a grid and crosshairs, release the . This will create a path to the nearest enemy. Kill that enemy to achieve a Coordinated Kill. Do this 9 more times to grab the achievement.
Note: If you were the one who completed the hack, IMMEDIATELY use the Coordination System () to highlight a target path to the player you just downed or stunned (who should be right next to you). Send a bullet to their head, execution style to get an easy Coordinated kill.
You will know when you get a coordinated kill because it will pop up under your kill score at the top of your screen.
Note:This does NOT have to be done in one game.
MeonOner Credits: XcS Dead Deer for the solution.