International Journal of Scientific Research and Engineering Development

Nigeria’s persistent security challenges have exposed the limitations of public law enforcement, prompting a surge in the role and visibility of Private Security Organizations (PSOs). This study critically examines the contributions, challenges, and regulatory landscape of PSOs in Nigeria, with a focus on Synergy Guard Nigeria and Halogen Group Nigeria. Drawing on a descriptive survey across Lagos, Abuja, and Port Harcourt, the research highlights PSOs’ roles in infrastructure protection, surveillance, and emergency response. It also identifies systemic barriers including outdated legislation, limited legal authority, and weak coordination with public agencies. Comparative case studies from South Africa, Kenya, and the United Kingdom offer insights into effective regulation and integration. The study concludes with policy recommendations aimed at professionalizing the sector, enhancing collaboration, and embedding PSOs into Nigeria’s national security strategy