Greg Clark is a global advisor, author, chairman, and non-executive director on cities and urban development. He is chairman of the Business of Cities Ltd, a globally-trading advisory team based in London. The Business of Cities Ltd provides intelligence and benchmarking services on cities to a global client base. These include inter-governmental organisations such as the OECD, World Bank, major firms such as JP Morgan, AirBnB, Siemens, Microsoft and major professional associations. Greg Clark’s role as company chairman and founder is augmented by activities as a global advisor on city development.