Deloitte outsourced their GNOC to India. They tried to sell it at first that they were just taking over third shift, which was harder to staff. It would have made sense to keep India as first level support, and keep one or two Americans to mentor and take anything complex.
Before they even outsourced everyone, one of the Hyderabad engineers got an alert that a server was running out of room. So he deleted some "temp directories". We're not exactly sure what happened, but part of what he deleted was AD stuff. Which replicated across the globe. The AD team leaps into action and after working 12 hours, managed to fix. At which point, Africa came back online and replicated the changes again.
We calculated it, and roughly estimated this one incident likely wiped out the savings for a minimum of 5 years, possibly 10.
Some of the engineers were pretty good, some were VERY good and we would have loved having them here. Most however weren't, even if they had three times the certs we had. Turnover was high.