Ann Walker studied international relations at Stanford University and international development at the London School of Economics. She began her career in strategy consulting with Booz & Company in Australia, and after her Masters joined the second Associate Programme cohort in London, where she worked for both Comic Relief and Vivobarefoot. After staying an additional year at Vivobarefoot to manage the company's operations, she joined Palantir Technologies' operations and strategy team in California. In 2014 she joined the On Purpose team to co-found On Purpose Paris, where she co-led the organisation and the Associate Programme for 3 years. Since late 2017 she has been supporting On Purpose's international team, first leading ad hoc projects and since May 2018 as Interim COO.