Payday 3 Engineer skill tree

Engineer

The Engineer skill grants access to the formidable Sentry Turret equipment, deployable in your loadout. This automated weapon engages non-mechanical foes until they're out of sight or eliminated, with the option to reset heat buildup by picking it up. Enhanced skills increase turret efficiency, from heat tolerance to armor penetration, and even allow for the deployment of a second turret, albeit at a faster heat generation rate.
BASIC
Unlocking this skill gives you access to the Sentry Turret equipment. This turret can be equipped in the equipment slot of your loadout.
The turret will shot any non-mechanical enemies it sees until the enemies are dead or no longer within sight. As it shoots, it will build up heat until it reaches max heat. Once the sentry is at max heat, it will stop functioning. The owner of the turret can pick up the turret at any point to reset the heat to 0 and redeploy it.
Equipping this skill increases the max heat build-up of your turret by 20%
ACED
Increases the max heat build-up of your sentry turret by another 20%.
Engineer AP Turret
Increase armor penetration of sentry turrets you deploy by 1.
Engineer Cooling System
Reduce heat build-up from damage, electrical explosions or hack attempts by 30% for all turrets.
Engineer Detonation
Whenever your turret overheats, it will cause an explosion that damages NPCs in an area.
Engineer Spin Cycle
Your sentry turret can now rotate 360 degrees to acquire its targets.
Engineer Dual Sentries
You can now deploy a second sentry turret, but all your turrets build heat 50% faster while shooting.
Engineer Targeted Fire
Your turrets will switch targets to whichever enemy you mark manually, if it's within line of sight. If you mark multiple enemies, it will prioritize the last one you marked.

Other Skills

Medic
Ammo Specialist
Mower
Infiltrator
Tank
Sharpshooter
Escapist
Demolitionist
Enforcer
Manipulator
Gunslinger
Grifter
Hacker
Tactician
Strategist
CQC Specialist