Jacinda Ardern, 43, who retired from politics in January 2023, will take up a Professor of Practice role this month and will deliver guest lectures and masterclasses, as well as provide mentoring. Former New Zealand Prime Minister Jacinda Ardern has been appointed as a lecturer and mentor at the USYD, commencing this month. Jacinda Ardern was elected as the prime minister of New Zealand when she was just 37.