There are 22 Workbenches in the (main) game, three in each mission (except mission 1 with 1 workbench). As always, some of the workbenches are very well hidden, and others are placed in easy spots.
In the spoilers of each mission, you will find the map of the mission with the marked workbenches and the video of this mission, so they should be easy to find. If you have any problems or need help, just ask.
The workbench (vid) for mission 1 is part of the all in one if you need it. I haven't created a single video for just one workbench.
Mission 1 (Behind Enemy Lines)
Mission 2 (Dead Drop)
Mission 3 (Sonderzüge Sabotage)
Mission 4 (Collision Course)
Mission 5 (Devil's Cauldron)
Mission 6 (Assault on Fort Rouge)
Mission 7 (Lock, Stock and Barrels)
Mission 8 (End of the Line)
All in One Video:
If you need help with other collectibles, I have a complete guide for each mission and a single video for all collectibles.
Mission 1 + 2 - Behind Enemy Lines + Dead DropMission 3 - Sonderzüge SabotageMission 4 - Collision CourseMission 5 - Devil's CauldronMission 6 - Assault on Fort RougeMission 7 - Lock, Stock and BarrelsMission 8 - End of the LineAll in OneLights, Camera, Achtung - Target Führer DLC