The current study deals with the Foreign Language Training for university students seeking the Master Degree in International Relations. The research focuses on the efficient organization of Foreign Language for Specific Purposes (FLSP), including ESP, course regarding the professional competence: meeting specific needs of the program stakeholders, designing it for adult learners of intermediate or advanced levels, etc. The aim of the course participants’ training is to apply a foreign language in professional work situations. The learners are expected to get new knowledge and experience through integrated education that includes more than one subject and tends to be more effective. This article offers the theoretical and practical support for FLSP practitioners researching, designing courses and providing materials for learners of the Master programs in International Relations and related professional areas. The support includes problem-based training to develop students’ professional competence. The training focuses on the insights from designing an FLSP course for such students, the analysis of their future job responsibilities, the stakeholders’ needs, as well as the FLSP literature on integrated education approaches review, the Master study programs and Qualification Requirements.