Bremen, Federal State of Germany, is planning to set up a headquarter for GMES - Global Monitoring of Environment and Security. One goal of the Institute of Shipping Economics and Logistics (ISL) is to develop services for GMES to improve the security in intermodal container transport with emphasis on the maritime sector. ISL is developing a Security Event Management System which takes care of all security related events in the intermodal chain. The security system registers the schedule and transport information of a container and assigns a corridor for its transport. During the transport the system receives events which will be used for computing a security risk factor for each container, by considering restrictions like position with respect to the assigned corridor, duration of standstill and others. According to the value of the security risk factor the user will be informed using web services, EDI, or email.