Effective frontline leadership within the Philippine National Police (PNP), particularly among Police Staff Sergeants (PSSg), constitutes a critical determinant of ethical decision-making, community trust, and public safety outcomes. Despite this, empirical evidence explicating how structured training programs cultivate these competencies remains conspicuously limited. This systematic literature review evaluated the effectiveness of the Public Safety Junior Leadership Course (PSJLC) and interrogated the role of the ADDIE (Analysis, Design, Development, Implementation, Evaluation) model in facilitating leadership development among PSSg officers. A comprehensive search of Web of Science, Scopus, and Google Scholar was conducted for English-language, peer-reviewed empirical studies published from 2015 onward, using keyword combinations related to the ADDIE model and law enforcement leadership. Following PRISMA guidelines, 34 empirical studies met the inclusion criteria and were appraised using the Mixed Methods Appraisal Tool (MMAT) version 2018. The findings illuminate that pre-test and post-test evaluations effectively capture gains in leadership skills (Villa & Jarque, 2024; Pastrana, 2024), while the ADDIE model furnishes a structured yet adaptive framework that enhances training relevance and outcomes (Nwizu et et al., 2022). Key emergent themes include leadership development, training effectiveness, community impact, and context-specific implementation challenges. The PSJLC yields a positive contribution to accountable and ethical leadership among PSSg officers, thereby advancing Sustainable Development Goal 16 (Peace, Justice, and Strong Institutions). Methodological limitations include the exclusion of pre-2015 studies and heterogeneity in pre- and post-testing applications across contexts. The review concludes with data-driven recommendations to strengthen the PSJLC and to advocate for national police leadership training standards.

Keywords: ADDIE model; law enforcement leadership; Police Staff Sergeant; PSJLC; systematic literature review; training effectiveness