Petrofac are traditionally an engineering support company although they're getting into Ops as they've been brought in by Lundin to operate Heather and North West Hutton. If your post is something to do with CNR (Canadian Natural Resources) then I'd guess you'll be headed for Ninian South or Central - CNR operate them but Petrofac provide the engineering support (poss maintenance as well). Workmate of mine's other half works for Petrofac - no complaints. He's doing some shutdown pre-works for Ninian S or Central, big shutdown April time.
Another green and yellow bod....