Which role is primarily responsible for overseeing system PoAM updates?

The role primarily responsible for overseeing system Plan of Action and Milestones (PoAM) updates is the Validator. This role involves reviewing and validating the status of the system’s security controls and ensuring that any documented findings, such as vulnerabilities or compliance issues, are updated in the PoAM. The Validator must be vigilant in assessing the effectiveness of corrective actions and tracking the progress of mitigations for identified risks.

Having a designated Validator is crucial as it ensures that there is a consistent and thorough review of the security posture of systems. This individual works collaboratively with other roles, such as System Administrators, who may implement mitigations, and Risk Managers, who analyze the potential impacts of risks. However, the Validator has the specific responsibility of maintaining and updating the accuracy and relevance of the information in the PoAM, which is fundamental to managing and mitigating security risks effectively.