Abstract: In crisis management involvement of a large number of organizations is required. Not only the first responders need to take action, but also organizations and entities like civil authorities, public utility and crisis teams are responsible for critical infrastructures as well as the community. A key element for effective collaboration is situation awareness; having a common operational picture. So far research has mainly focused on situation awareness. However, several incidents show that situation awareness alone is not sufficient for reaching effective collaboration among the organizations involved. Collaboration awareness is a second key element. Knowing the needs, goals, expectations, culture, capabilities and procedures of the crisis management partners makes collaboration more effective. In this paper we elaborate our research focusing on what organizations need to know about each other in order to collaborate effectively. Finally, we describe the possible measures for increasing the collaboration awareness. Â© 2012 ISCRAM.