A range of important projects were designed in the office, most noticeably the Conservatorium of Music (2002), the upgrade of Circular Quay (2002) and the upgrading of George Street and Railway Square (2000). Another major achievement was the "Houses of the Future Exhibition" during the Year of the Built Environment (2004). Johnson retired as Government Architect in July 2005, and went on to become Executive Director of the Department of Planning, and is currently Chief Executive of Urban Taskforce, a property development lobby group.