Purpose: This study aims to systematically synthesize and evaluate existing scholarly literature concerning the influence of employee work discipline on service quality within the public sector, specifically to provide a conceptual framework applicable to regional legislative secretariats. Research Methodology: This research employs a Systematic Literature Review (SLR) following the PRISMA 2020 guidelines. Peer-reviewed articles published between 2014 and 2024 were retrieved from international databases including Scopus, Web of Science, ScienceDirect, and Emerald Insight. After a rigorous screening process based on inclusion and exclusion criteria, 15 primary articles were retained for thematic synthesis and content analysis. Results: The synthesis identifies that work discipline comprising time discipline, regulatory compliance, responsibility, and work ethics—serves as a primary driver of service quality. The analysis reveals that the effectiveness of discipline is increasingly influenced by digital work environments (e.g., e-attendance systems) and supervisory support. However, a significant gap remains regarding the integration of these dimensions into a unified service excellence model in legislative settings. Conclusions: Work discipline is a critical antecedent of public service quality. The findings suggest that a robust disciplinary framework, supported by digital monitoring, is essential for enhancing citizen trust through improved administrative performance. Limitations: As an SLR, this study is limited to the availability and quality of previously published literature and does not involve direct primary data collection from respondents. Contributions: Theoretically, this study integrates fragmented findings into a comprehensive conceptual model. Practically, it provides a strategic roadmap for legislative secretariats to enhance service quality by optimizing disciplinary dimensions and digital oversight.