Grant Robertson was a member of Parliament for fifteen years, including being New Zealand's Minister of Finance from 2017 to 2023 and Deputy Prime Minister from 2020 to 2023. In addition, he was Leader of the House, and held Ministerial portfolios in Infrastructure, Sport and Recreation, Racing, Earthquake Commission, Cyclone Recovery and an Associate Ministerial role in Arts, Culture and Heritage.

Grant is now Vice-Chancellor at the University of Otago. He and his partner, Alf, have four grandchildren. Grant and Alf live in Dunedin.