Abstract: Live team training of firefighters has several disadvantages. Firstly, it is costly because many team members and training staff are involved. Secondly, not all team members have the same competency level, and some individuals may just not be ready to train in a team context. Thirdly, live training in high-risk situations is difficult and dangerous. Consequently, critical situations can not be trained adequately. Following a scenario-based and a rapid prototyping approach, we are designing and developing a pc-based virtual training environment to train individual firefighters in making decisions in a team context operating in high-risk situations. This individual training program can better prepare the firefighters for live training, enhancing the effectiveness and efficiency of these team-training exercises. In this paper we describe the training-method, we outline how this is technologically implemented and discuss how we are planning to test the prototype.