Greg is Chairman of the Business of Cities Ltd, providing global benchmarking services on city performance.

He is also a global advisor, author, and non-executive director. He is Professor, and Co-Chairman of Advisory Board, City Leadership Lab, UCL and Fellow of the Academy of Social Sciences. His expertise covers city economies, globalisation and trade, city identity and promotion, planning and transport, city and metropolitan strategic planning, technology and smart cities, urban investment, national and regional strategies.