She will manage a portfolio of the line’s trade accounts to lead the strategic commercial and marketing direction of her agent partners for "mutual growth".
With a background of over 25 years working in travel retail and commercial, Dos Santos has experience in strategic account management, increasing sales, and nurturing trade relationships.
During her last travel role with Thomas Cook, she was responsible for the relationships with multiple suppliers, including key cruise accounts.
Rachel Poultney, Princess Cruises UK and Europe sales and commercial director, said: "We are delighted to welcome Nikki to the team.