O'Sullivan said: "I cannot wait to get started in Diageo's home market of Great Britain, where some of the country's most iconic and loved brands are at the heart of celebrations. "After four wonderful years in Ireland, I look forward to bringing my experience to this new role and building on the incredible legacy Nuno leaves behind." Diageo Mexico Teles joins Diageo Mexico after three years in Great Britain, where he is credited with growing the business despite challenging market conditions. He has also made bold decisions to reshape the GB operations, including last year's establishment of the Diageo Luxury Company, which aims to streamline and refocus the market's emphasis on the luxury sector. Throughout his time in GB, Teles has championed a people-first culture at Diageo, ensuring that the company's purpose of 'celebrating life every day' thrives within the GB workforce. Teles commented: "While I am excited by the opportunity ahead, I will be very sad to leave the remarkable market that is Diageo GB.