The article presents the challenges connected with working in multicultural environment. In the authors’ opinion, these challenges include the employees’ and managers’ levels of cultural intelligence, effective intercultural communication, and the efficient and effective functioning in a multicultural team. The article is based on a review of the subject literature and the study conducted as part of the project: Social Integration Leaders [Liderzy Integracji Spo?ecznej]. The model programme for the improvement of migrants’ social competence under the Operational Programme Knowledge Education Development [Program Operacyjny Wiedza Edukacja Rozwój] 2014-2020, co-financed by the European Social Fund in the field of social competence of migrants working in intercultural teams. The aim of the article is to analyse the challenges of working in multicultural environment identified by the respondents of the study conducted among the Ukrainians who live in Poland and work in culturally diverse teams. In order to compare the challenges of working in multicultural environment, the authors also referred to other studies conducted among employees of other nationalities.