Final specialist thesis Investing in the quality of preschool staff as a contribution to the improvement of business endeavored to approach educators in terms of professionalization of staff and policy makers in terms of being informed about the most important elements of quality that ensure child development, learning and well-being. This thesis resulted in a comparison of quality elements of pre-school education and recommendations for improvement. This thesis attempts to highlight the importance of investing in high quality ECEC in terms of long-term learning and child development. The intention is to encourage educators to actively reflect and participate in professionalization. The need to invest in employee quality and working conditions is proven by analyzing the theoretical part, preliminary research for comparative analysis on a sample of preschool educators from Istria and Split, and comparison of different welfare state models in the European context. The thesis is after the introductory chapter, divided into five sections which emphasize the importance of employee quality and working conditions for improving the business and prove the need for investment. The preschool institution should be a place to create new value, where sustainable quality is achieved based on the competencies of employees, and is embedded and recognizable in the vision and mission of the institution. The results of this thesis should influence the increase of the quality of preschool education, the promotion of professional satisfaction and motivation of employees and raising the standard of work. This would help improve the business and thus strengthen the basic skills of 21st century children.