Applied in March of 07, didn't hear anything until October, and was given 1 business day notice of interview. A lot of situational questions, more just a conversation steered in the direction that the interviewer wanted to go. All interviewers are ex engineers, very helpful and knowledgeable. 4 days later I was flown across the country, meals out, see the actual operations at 3 field sites over 2 days, and a formal interview at the end of it. There was about 20 of us there. One thing, is although they were very upfront about how much you would be working and that you would be spending tons of time away from home, is that they really pushed the work hard/play hard mantra, and 2 years later it really turns out to be only a work hard mantra. The benefits where given a rosy spin, and are a lot less common or frequent than I was led to believe.