Due to ever increasing social demand for more decentralized decision making in the field of technological risk regulation, many social actors from different backgrounds, e. g., industry, scientific research, national and local governments, volunteer organizations, etc., are becoming involved in the decision making processes. This mix of interested parties brings about competing cognitive perspectives and conflicting interests. Thus, there is the need for a participatory approach to risk definition and management which requires that all social actors who have a vested stake in an actual or proposed utilization of technology have the possibility to express their points of view. In addition to cultural/social preparedness on the part of the decision makers, the successful application of participatory methodologies also necessitates a certain level of technological preparedness which can be acquired through the effective implementation of information technology support systems. Within this context, this paper develops a unified perspective on issues such as environmental management, emergency planning and technological risk assessment. It discusses design and application aspects of computerized information support systems and makes suggestions on how to design information technology tools to make them fit naturally and effectively into social organizational structures.