Mandeer graduated from the London School of Economics with a degree in Law, and later completed a Master's in Law at the University of Warwick, focusing on international law and human rights. Prior to joining Political Intelligence, she worked as a Research Consultant at another public affairs agency, providing monitoring and intelligence of global and national regulatory and policy developments across sectors including health, food and drink, aviation and technology. She created interactive dashboards displaying stakeholder and regulatory landscapes for clients, using the data visualisation and analytics software Tableau. Before this, she worked as a Management Consultant at KPMG across a number of business transformation projects, for multinational corporate clients. Whilst at KPMG, she received an Advanced Diploma in Management Accounting, from the Chartered Institute of Management Accountants (CIMA). At Political Intelligence, she works primarily across the healthcare sector.