The paper presents some of the main scientific results achieved within the framework of a recently completed NATO Science for Peace and Security research project. The project aimed to harmonize the different seismic risk maps of Romania, Bulgaria, and the Republic of Moldova, and to develop standard maps in Eurocode 8 format, reflecting the real trans-boundary geophysical characteristics. In order to achieve these results, an important amount of research work in the field was carried out by the project teams of the three countries. The project also involved training of young scientists in the fields of seismic hazard, vulnerability and risk, organizing of seminars and workshops with international experts, and upgrading the national seismic networks with new digital equipments. The general coordination of project activities, and the evaluation of the project progress, were performed by a scientific team from the Middle East Technical University in Ankara, Turkey.