Potter, who announced his resignation from M&C last week, will become the new chief executive of the hotel management arm of the Maltese-owned Corinthia Group.
CHI manages 20 four and five-star hotels in Europe and Africa and is about to begin a rapid expansion programme over the next few years.
Potter said: "I am excited by the prospect of joining Corinthia hotels international and building upon what is already an excellent reputation."
Corinthia Group chairman Alfred Pisani added: "We have ambitious plans for our hotel business, as investors and operators and we welcome Tony as a key contributor to this development and growth."
By Emily Manson