A managed security service provider (MSSP) is an external party that provides cybersecurity services to its customers. Because of the complexity, ever-evolving threats, and niche expertise required to run an effective security program, many organizations choose to outsource their security to a MSSP instead of going through the effort to hire, train, and maintain their own cybersecurity program. MSSP’s services are broad and can range from baseline system monitoring to comprehensive offerings that fully manage a customer’s security.