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Hannah Harrison is an accomplished sustainability professional currently serving as Chief Sustainability Officer and Director of Sustainability at WPP since February 2019. Prior to this role, Hannah held the position of Manager at Earth Security Group, where responsibilities included project management and report writing on sustainability innovation in agri-business. Hannah's extensive experience at SABMiller involved senior management of global sustainable development strategy, while earlier roles at Tesco encompassed various managerial positions focusing on climate change, corporate responsibility, and government affairs. Educational qualifications include an Executive MBA from the University of Cambridge, a Von Clemm Fellowship from Harvard University, and a degree in Philosophy, Politics, and Economics from the University of Oxford.