• Definition of security. • Types of security. • Meaning of types of private security. • Origin and development of private security. • Reasons for the growth of private security sector. • Legal framework of private security company. • Organisation of private security company. • Prospect and limitations of the private guard companies act (1986) to the effective operations of private security companies in Nigeria. • Training and development. • Equipment and other accessories. • Functions of private security. • Risk analysis and the security survey. • Challenges and problems of private security service. • Computer and information security. • Nigerian Security and Civil Defence Corps (NSCDC ) act no 2 of 2003. • List of private security companies in Nigeria. • Conflict management in private security service. • Relationship between police and private security operatives in Nigeria. • Regulation and recommendation of private security service in Nigeria. • Specific security threat.