The world lives in the era of conflict, when the safety and well-being of states or individuals to a large extent depend on the availability of well-trained professionals who are able to perform mediating functions, keeping in mind ethnic, national, political, cultural and other differences between conflicting sides. However, employers increasingly claim that today’s graduates lack the skills required for conflict management and mediation even in homogeneous working environments, let alone multinational teams and international interaction. This problem is particularly relevant for the field of international relations where conflict resolution by peaceful means is very important. Countries with transition economies, such as Russia and Kazakhstan, where there is a gap between labor market requirements and university teaching practices, have been searching for new ways to educate and train young specialists. This article presents the preliminary results of a collaborative project between Petrozavodsk State University of the Russian Federation and Gumilyov Eurasian National University of the Republic of Kazakhstan. The project includes a set of dialogue- and polylogue-based learning activities with special focus on addressing any discrepancies, misunderstandings and divergence of views. The aim of the paper is to assess the impact of professionally oriented cross-border communication in the English language on the readiness of international relations students from Russia and Kazakhstan for resolving future professional disputes through mediation. The authors used formal structured questionnaires with closed-ended questions for obtaining necessary data and the comparative analysis method for interpreting them. The results suggest that systematic English-language cross-border communication in a realistic work-like environment will demonstrate the importance of mediation as a component of professional communicative competence to the students and will better prepare future foreign affairs staff for conflict resolution and mediation.