The sustainable development serves as the resulting index of new economic, social and political development in society with multiple uncertain parameters due to the increased process dynamics. It foresees the creation of personnel training system, the personnel able to develop proactively and fit the times. Consequently, it sets other tasks to the professional education system. The analysis conducted by the authors is directed to studying the term “professionalism” on the example of the social sphere, the dynamics of key professional functions and possibilities of social sphere specialists’ professional conversion. Respectively, primary trends in the social education development and the compliance with the labour market needs in social sphere, the impact of professional activity of social sphere specialists towards sustainable development in our country were analysed. The evaluation of study results was carried out during the development of professional and education standards, their professional and public hearings, and the development of recommendation on application of network and distance technologies in the social education.