Your Role as Mission Owners – The Final Step to IL5 Authorization

While AWS provides secure infrastructure and RegDOX delivers secure applications, your role as Mission Owners is essential. Ultimately, your agency’s Authorizing Officials (AOs) must perform independent risk assessments and grant the final Authority to Operate (ATO). This critical step ensures that your unique security requirements are met and that your systems are fully compliant. Understanding your role sets the stage for our next discussion, clarifying the differences between provisional authorizations and agency-specific approvals.

Understanding the IL5 Landscape

The Department of Defense (DoD) employs the Cloud Computing Security Requirements Guide (CC SRG) to categorize cloud workloads based on sensitivity and required security controls. Impact Level 5 (IL5) supports Controlled Unclassified Information (CUI) and unclassified National Security Systems (NSS) data that is mission-critical and requires a higher level of protection, including controlled access and robust security controls..

AWS GovCloud (US) has achieved a Provisional Authorization (PA) from the Defense Information Systems Agency (DISA) for IL5, indicating that its infrastructure meets the necessary security controls. This PA enables DoD customers to deploy production applications within AWS GovCloud (US) for workloads requiring IL5 compliance.

Mission Owners and Their Pivotal Role

Despite AWS’s IL5 PA, the responsibility for securing the application layer and ensuring full compliance rests with the Mission Owners. This includes:

• Risk Assessment: Evaluating the residual risks associated with deploying applications in the cloud environment.
• Security Control Implementation: Ensuring all necessary security controls are in place and functioning as intended.
• Continuous Monitoring: Establishing processes for ongoing monitoring of the system’s security posture.
• Documentation: Preparing and maintaining comprehensive documentation to support the ATO decision-making process.

Mission Owners must collaborate with their agency’s Authorizing Officials (AOs) to review the Security Assessment Report (SAR) and Plan of Action and Milestones (POA&M) provided by the Cloud Service Provider (CSP) and the Certified Third-Party Assessment Organization (C3PAO). This collaboration is crucial to determine if the risk level is acceptable for the agency’s specific mission requirements.

From Provisional Authorization to ATO

A Provisional Authorization (PA) signifies that a CSP’s infrastructure has met certain security standards. However, it does not equate to an Authority to Operate (ATO) for specific applications. The ATO is a formal declaration by an agency’s AO that authorizes the operation of an information system and explicitly accepts the risk to agency operations.

To transition from a PA to an ATO, Mission Owners must:

1. Conduct a Detailed Risk Analysis: Assess how the CSP’s environment aligns with the agency’s specific security requirements.
2. Implement Additional Controls: Apply any supplementary security measures necessary to mitigate identified risks.
3. Engage in Continuous Monitoring: Establish mechanisms to detect and respond to security incidents promptly.
4. Obtain AO Approval: Present the comprehensive risk assessment and mitigation strategies to the AO for final approval.

This process ensures that the system not only leverages the secure infrastructure provided by AWS but also aligns with the agency’s unique operational context and risk tolerance.

Conclusion

Achieving IL5 compliance is a collaborative effort that extends beyond the capabilities of the CSP. As Mission Owners, your active participation in risk assessment, control implementation, and continuous monitoring is vital to secure your agency’s information systems. By understanding and embracing your responsibilities, you play a crucial role in safeguarding national security interests and ensuring mission success. Up next, we’ll explore how these responsibilities tie into the broader compliance framework—specifically, the differences between Provisional Authorizations and Agency-Specific Authority to Operate (ATO). Next week’s discussion will help clarify how each type of authorization shapes your path to IL5 compliance. For more information on this series overview, visit DoD IL5 Compliance.

About RegDOX

At RegDOX Solutions Inc., we help defense contractors and high-security organizations simplify compliance with ITAR, EAR, DFARS, NIST SP 800-171, and CMMC requirements. Our secure, cloud-based platforms combine end-to-end encryption, access controls, and audit-ready documentation to keep your data—and your contracts—safe.

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