As well as being a practising urbanist, Miller was also a commentator on urban design issues, a member of the editorial board of Urban Realm magazine, and was involved with urban design education at the University of Strathclyde's Department of Architecture and the University of Glasgow's Department of Urban Studies. He was a member of the Architectural Association. Miller was also a member of the Paris-based Association Internationale de Développement Urbain (INTA); he was a member of the INTA Panels for Bordeaux Metropolitan 2010 and Repositioning of the South-West sector of the Lyon Metropolitan Area: Givors-Grigny in January 2013. He wrote for The Guardian, The Architectural Heritage Society of Scotland magazine and Urban Realm magazine, and lectured on European Urbanism at Wayne State University, Detroit.
