Paper deals with requirement engineering that is used in the first phase of project SIMEX (Research and development of simulation tools for training cooperation of actors in emergencymanagement by subjects of critical infrastructure. Project SIMEX focuses on the development of simulation tools and instruments for common interoperability training of crisis staff managers, security advice bodies and liaison safety employees in the energy sector with the integrated rescue system in dealing with emergencies and their consequences. This paper also deals with the analysis of different national systems providing publicly available information and evaluates the usability and benefits of implementation of information generated into simulation tool.