In the three lines of defense model, the primary responsibility for ensuring risk mitigation controls are properly configured belongs to line management.

First Line of Defense:

Operational Management:Line management is part of the first line of defense and is responsible for managing risks and implementing controls in their day-to-day operations.

Direct Control:They have the most direct control over processes and are best positioned to ensure that risk mitigation controls are properly configured and functioning as intended.

Responsibilities:

Implementation and Monitoring:Line management is responsible for both implementing the controls and monitoring their effectiveness. They are on the front lines of risk management and are integral to maintaining control effectiveness.

Accountability:They are accountable for ensuring that controls are aligned with the organization's risk management policies and procedures.