As a Director, Nathan leads on the Portal’s methodological approach and embedding social value in procurement, as well as managing a number of key client relationships. He brings over 20 years’ experience working on the procurement of major public sector projects and with large and small companies in the energy, clean-tech and sustainability. Previously a partner at Grant Thornton, Nathan set up and managed Grant Thornton’s Energy, Cleantech & Sustainability sector for over a decade and has worked across social, environmental and economic infrastructure projects in education, health, housing, economic development, digital and IT. He is a recognised thought leader on sustainable cities.