Personal Trainers - Careers at Sea Imagine working for the leading spa operator on board luxury cruise ships. Apply today and make your dream a reality. OneSpaWorld operates spas on over 190 luxury cruise ships sailing the seven seas from California to Hong Kong, Alaska to South America. Work your way around the world with us. You must have a recognised certificate in Personal training, knowledgeable in all aspects of fitness is essential. Yoga and Pilates would be a benefit but not essential. You will deliver informed and fun seminars; therefore, public speaking will be important. 6 months paid or unpaid experience would be a benefit.