They sit you down and have you visit 5 offices. Usually 2 supervisors or 3 then 2 managers or 3 but it is ussually limited to 5 interviewers. Personality questions What would you do if you were confronted with this behaviour etc.

Phone interview with recruiter (company employee) then 1:1 interview with future manager and two other department supervisor. Drug and background screening, Take hair sample for drug test. The interview process was one of the better that I have gone through, but word back can be lengthy; perhaps due to extensive background check. Last phase is a very thorough medical evaluation, which is repeated every year. Hey, it's a free medical check every year!