The working hours vary depending on position and work location. For example the administrative/business support personnel work an 8 hour day Monday to Friday. Our trade roles in Nisku generally work 8 days on, 6 days off with a shift length of 10 hours. The Slave Lake plant operators work 4 days on, 4 days off with a shift length of 12 hours.
Not much for preparing for the interview. Just show up. Ask questions, know what you are getting into.