Interview process for refinery roles?

Hi Frazierali - sorry for the delay but only now can I post on this forum. Had an interview for an ops position in London in late May. Single interviewer (I believe he was an area ops leader) just asked general questions regarding manning structure/management structure of current employer, shift pattern worked etc interspersed with some specific ops question ranging from troubleshooting desalter operations at the beginning of the interview right up to giving an overview of how a crude unit would be started after handback from maint. They have your CV and I thought my interview was just to confirm their thoughts before making an offer. As I say had my interview in late May, offer made second week of June, all contingencies passed, passport stamped by late August. I am currently awaiting travel details to leave for KSA. Hope this is not too late and helps. Good luck