I don't think that you will get a reply from this web page.
I suggest that you make a note of all the cruise lines then put one name in at a time on Google and find the official web-site for each cruise line like pocruises.com for P & O Cruises. Look at their site and somewhere on it you will find "Employment" or "Jobs" , click on that and it will take you to their employment vacancies section. Hope that helps. .... Neil.
Which leads me to the simple further question- why aren't questions vetted?
They are but the "black marker" only comes out when it is rude, blasphemous or has a conflict of business interest I think. Besides if we can steer someone in a good direction that can't be a bad thing. Regards. .... Neil.