[2][3][4] Manning worked a physiotherapist and then as a lawyer and lecturer, before founding a food sharing organisation (initially named FoodShare and now called KiwiHarvest) in 2012.
[2][5] KiwiHarvest collects and redistributes food that can’t be sold for reasons such as damaged packaging, cancelled orders, mislabelling or short-dated.
[2] By 2024, KiwiHarvest was operating five branches nationally, and had delivered 12 million kilograms of food to more than 220 charitable organisations.
[2][9] She has been named as a Distinguished Alumni of Otago Polytechnic, and was one of the 2023 Top 50 Women in Food & Drink in Aotearoa New Zealand.
[11][12] In the 2024 King's Birthday Honours, Manning was appointed an Officer of the New Zealand Order of Merit for services to the community and the environment.