Information System Security Manager (ISSM)

An Information System Security Manager (ISSM) is the person responsible for managing the cybersecurity program for one or more information systems. The ISSM ensures security policies are implemented, monitors compliance, coordinates with the Authorizing Official, and oversees the day-to-day security operations of the system.

In DoD environments, the ISSM is a formally designated role with specific training and certification requirements. They serve as the primary point of contact for all security matters related to their assigned systems and must be knowledgeable about RMF, the system's security posture, and applicable policies.

Why It Matters

If your company operates DoD systems, you need a qualified ISSM. This role is critical for maintaining your ATO and ensuring continuous compliance — it's not a collateral duty that can be assigned casually.