E&M applicants have rated the interview process at SLB with 2 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 73% positive. This is according to Glassdoor user ratings.
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Interview process was pretty informal and non-technical. I had a phone call that lasted about half an hour with one of the recruiters. The focus of the interview was on previous projects I worked on and what I was interested in.