Who is primarily responsible for the security of classified materials?

The unit commander is primarily responsible for the security of classified materials because they hold the ultimate accountability for the safeguarding of all information and assets within their command. This responsibility includes ensuring that proper security measures and procedures are in place to protect classified information from unauthorized access, disclosure, or loss. The unit commander must ensure compliance with relevant policies and regulations governing the management of classified materials.

While other roles, such as the information security officer, personnel security officer, and security manager, contribute to the security of classified materials by developing policies, implementing programs, and conducting training, the unit commander has the overarching responsibility for the enforcement of these measures. Thus, it is the unit commander's leadership and oversight that ultimately secure the classified information within their unit.