He spent a decade in architectural practice where he worked on a variety of commercial, domestic and public buildings, before becoming a founder partners of Eclipse Research Consultants, a small independent research consultancy undertaking commissions for a variety of mostly public sector built environment organisations. He has written many good practice guides on energy efficiency in the built environment. He is also an Associate with Cambridge Architectural Research. He joined the Department of Architecture on a part-time basis in 1996, and was appointed Director of IDBE, a joint initiative of the Departments of Architecture and Engineering, in 2006.