It is confirmed that the efficiency of an inclusive educational environment functioning is ensured by the presence of diversified psychological and pedagogical professionals and their proficient cooperation. The training of these professionals is of top priority while developing inclusive education in Ukraine. The results obtained during the pedagogical experiment convincingly prove that the author's developed and tested methods and teaching and methodological materials allow directing the educational process to the training of future diversified psycho-pedagogical professionals to work in the conditions of the inclusive educational environment. During the formative stage of the pedagogical experiment, research and experimental work were carried out to check the effectiveness of the specialist training system of the psycho-pedagogical field to work in the conditions of a functioning of the inclusive educational environment. In order to obtain empirical data and to ensure their validity, a questionnaire and methodology to diagnose the levels of formation of bachelors' professional competence were developed, in the context of which the criteria and levels of formation of the investigated quality were defined, as well as the tools for its implementation were created.