The Halliburton hack is a good example that assuming skilled engineering, programming, and operational positions are commodities and all interchangeable is not a smart business move. Chevron can't compete here to attract the best and brightest, it's going to be even worse overseas where the hours and oversight will result in frequent turnover and a struggle to maintain any real OC.
Not so long ago we were in a panic that the majority of our programming OC was contractor based or overseas. We changed that, but appear to be making the same mistake with engineering. Ask any competent professional how much time they spend either correcting, or creating requests to fix solutions that were delivered by those overseas hired at a certain price point.