Check out www.pocruises.com and click on 'careers' on the bottom right hand corner. This will forward you to all sea and land jobs within Carnival Corporation at presen.
These are you big companies mostly owned by Carnival Corporations. Once you enter the main page, go to the end of the page and search for ''jobs/carreer/ crew placement''..sship side and not shore side. Everyear newer ship are launched..have a cv with picture well presented. Cunard has there office in Southampton. Good luck.