You need 6 Cover Thefts and 6 Cover Heist. Must be "Cover" type of Theft and Heist, not just Theft or Heist and 6 AND 6. I did it and unlocked that engineer.
Wow...you will argue with me ?? I did it and I know what I did. 6 AND 6. not combination 6 or 6. If that is what customer service person told you then he was wrong. Maybe never played the game.
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It's 6 missions total. Any combination of Covert Thefts and Covert Heists should do it.
But since Covert Thefts are not properly counted, most people prefer to do 6 Covert Heists then a relog and be done with it.
My own experience was not that smooth since for quite a while the station i was based lacked any Covert Heists.
So i started with Covert Thefts, knowing they are not counted properly. Eventually i did 7 Covert Thefts and 3 Covert Heists (the unlock came after handing over the last 2 covert thefts followed by a relog).
So 10 total missions due to the bugged counting of Covert Thefts
Also... check Zac's response below.... 6 missions total.
TERRA VELASQUEZ
Hey all - I'm looking into the stuff with Terra now - it seems like the unlock prerequisites are all working now? Happy to be proved wrong. Can somebody potentially sum up any of the other issues with Terra into one post for me to read please as I'm also seeing stuff about financial projections...