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Casier Liesbeth

International Institute for Sustainable Development (IISD)


Lead, Public Procurement & Sustainable Infrastructure Policy and Coordinator of the NBI Resource Centre

Liesbeth’s work focuses on research and advisory services that involve innovation and sustainability in public procurement. She works on policy & regulatory frameworks and the business case for the planning, procurement and financing of sustainable infrastructure. Liesbeth also works with IISD’s Sustainable Asset Valuation (SAVi) methodology to make the case for sustainable and nature-based infrastructure.

Liesbeth has advised governments in Bhutan, Canada, Colombia, the Dominican Republic, India, Morocco, Paraguay, Senegal, South Africa and the Netherlands. Liesbeth also works extensively with the European Commission, the Inter-American Development Bank, the World Bank and the Organisation for Economic Co-operation and Development (OECD) on policy frameworks and the business case for sustainable infrastructure. She represents IISD at the OECD Working Group on Leading Practitioners on Public Procurement.

Liesbeth previously worked with UN Environment and started her career as consultant in auditing and corporate finance with a family-owned consultancy business in Belgium.

Liesbeth has an academic background in political science and law. She holds a master’s degree in development studies from the Graduate Institute of International and Development Studies (Geneva, Switzerland). She also has master’s degrees in complementary studies in business economics and in political science, both from the University of Ghent (Belgium).

Liesbeth works in Dutch, English, French and Spanish.