Introduction. The present paper addresses social, psychological and professional characteristics of a mature human adult (ages 56-60). The analysis of a social situation of development determines essential developmental inconsistencies akin to a confl icting reality between external and internal conditions for the process of selfrealization. The termination of professional engagement causes emotional stress and (normative) crisis of job loss and initiates the search for the ways to ensure solvency and professional performance. Thus, the relevance of this research is underpinned by the idea that self-realization is a factor of ensuring professional performance. The confl icting realities in personal growth during the period of mature adulthood feature a social situation of development where social and technological activities are the most dominant in leading economic sectors. The structural and functional model of self-realization refl ects the basic features of a newly formed personality. The aim of the present research is to defi ne the aspects and patterns of human self-realization that accounts for professional performance. Methodology and research methods. A new theoretical and applied discipline constitutes the methodological framework of the present research. It involves psychologic, postmodern paradigm, methodological approaches to and principles of professional creditworthiness, as well as the concept of professional growth. Results. The heuristic model of professional self-realization generalizes the social situation of development in mature adulthood. The said model has become the blueprint for the structural and functional model of self-realization that accounts for professional performance of a person in mature adulthood. The purpose of the present research warranted the development of a supplemental educational program which increases the professional worth of a person nearing retirement age. The program content is illustrated as a block module, thus enabling to tailor several learning paths to individual needs of trainees. This program is meant for online learning and is based on advanced educational technologies. Practical signifi cance. The points and recommendations stated in the paper can be used by staff development services. However, our primary goal was to help people with their self-determination during professional transformation of economy through self-actualization and self-realization to ensure their professional performance.