First Objective is finding the 3 marked crates, they contain breaching charges, a keycard and a blowtorch that you will need to progress towards the vaults.
Once you are in the mainframe you can use the camera system to see which 4 vaults have the loot and open those they take 1 minute each. When you hacked them make sure to actually physically open them under 10 minutes to get your achievement.
Special thanks to my teammates:
Avarat
P1ckl3s