This research highlights the evolution of employee competence, organizational commitment, and sustainable performance in public sector or public service organizations by analyzing key trends and key concepts. We also analyzed and mapped the knowledge structure of research themes. Furthermore, this paper aims to outline a specific research agenda for the research subject. This research employs a systematic, integrated literature review approach, conducting a systematic review of existing literature on employee competency, organizational commitment, and sustainable performance in public sector organizations or public services. The PRISMA statement guidelines were followed. We obtained a total of 91 inclusion documents from Semantic Scholar. Our results show that there is a relationship between employee competence, organizational commitment, and the sustainable performance of public sector organizations or public services. Understanding the role of employee competence and organizational commitment in improving the sustainable performance of public sector or public service organizations requires the use of robust research models and a thorough conceptualization of how these relationships can emerge. We propose a research model for the future research agenda that explores how organizational commitment mediates the role of employee competence in improving the sustainable performance of public sector organizations.