Proceeding of the Joint International Symposium on Deformatuon Monitoring. 2-4 November, 2011. Hong Kong. China. Report. This paper discusses the use of microwave radar interferometry for monitoring the dynamic behaviour of civil engineering works. It provides an overview of the method, its principles of operation and applications areas, with particular emphasis given on the IBIS-S system. Two case studies are considered and the results of the preliminary analyses are presented and discussed. The first case study involves the monitoring of the dynamic response of a tall chimney due to wind load. The second example examines the dynamic behaviour of a long cable-stayed bridge. In this case, the focus is placed on the effects that individual traffic events impose on the vibration response of the structure; particularly, along and on the midpoint of the main span of the bridge.