You’ve worked hard to achieve full compliance with CMMC 2.0 by implementing the controls outlined in NIST 800-171. Now it’s time to make sure your system doesn’t decay, sliding you into a non-compliant state. In our last blog, we discussed the components of a solid compliance management plan and the importance of assigned ownership for key activities. Now it’s time to address other key aspects that support your efforts to maintain your compliance.
Why Compliance Fades Without Operational Discipline
Cadence, organization, and durability are key to being audit ready. You may feel compliant today, but how do you stay compliant tomorrow and what pushes you out of compliance? The below challenges cause chaos and disruption to your compliant state. Without active management, drift toward non-compliance is inevitable.
- Staff turnover – Institutional knowledge needs to stay in-house. In the event that key personnel leave the company, make sure you have all processes documented so that staff changes don’t impact your compliance status.
- Technology changes – Cloud migrations, new tools, updated security capabilities, and new environments could all impact your audit readiness. Monitor and actively seek out changes while adjusting your processes, documentation, and system security plan (SSP) to tell the right narrative and keep you operationally compliant.
- New controlled unclassified information (CUI) use cases – Expanding how your company processes and stores CUI because of contract changes can substantially change your scope. For instance if you start using Microsoft 365 to work on a new contract with the Navy, that’s a major change. You will have to account for a new in-scope platform and the configuration management practice changes needed for that environment.
- Boundary changes – Moving from an enclave model to an enterprise-wide environment is not an administrative detail—it’s a compliance event. NIST 800-171 is fundamentally data-centric, and how CUI flows dictates how controls must operate.
Repeatable Processes Are Key to Maintaining CMMC Compliance
You have some flexibility to set your own cadences for structured activities. Define how frequently you’re taking these actions and make sure you are meeting your commitments. Don’t deviate too far out from best practice, stick with what’s reasonable.
Here are commonly used operational cadences:
- Access review – quarterly
- Policy reviews – annually
- IR tabletop – annually
- Audit log reviews – continuous / weekly
- Self-assessments – annually
However, you define your dates, make sure you put them on the calendar. Assign owners. Define expected outputs. Every process in your compliance program should have a schedule, a responsible party, and a documented result.
Treat Major Business and Technology Changes as CMMC Compliance Events
Major business or technology changes have compliance impact and should trigger a scope review, boundary and CUI flow validation, and risk and Plan of Action and Milestones (POAM) updates. Acquisitions, mergers, or divestitures typically involve staff movement and turnover. Be sure to talk about the desired end state.
If the change would alter your narrative to a CMMC third-party assessment organization (C3PAO), treat it seriously and account for it. Start with assessing the new environment and discovering how the CUI flows, then update the SSP to tell the right story. In-scope platforms, control narratives, policy and procedure documentation, and operational capabilities should all be effectively maintained in a way that accurately reflects your current status.
Why Compliance Evidence Must Stay Current for CMMC and NIST 800-171 Audits
Deliver proof, not promises, being sure to have fresh evidence to build your case of a compliant state. C3PAO auditors have the option to either ask for evidence or a demonstration, but it’s best to understand that every process has an output. When you’re doing an annual assessment, collect refreshed artifacts. Assessors prefer recent, relevant evidence demonstrating ongoing operation. Evidence must show current compliance and include:
- Recent audit log review records
- Tickets and change approval documentation
- Signed and communicated policy acknowledgements
- Meeting minutes from change management boards and compliance-related reviews
Also account for the right verbs in the NIST 800-171A assessment guide. Any control that uses the operational verbs (monitor, maintain, perform, review, or update) requires a process executed and documented on a regular basis.
Use Your POAM as a Continuous CMMC Compliance Management Tool
Well-maintained Plans of Action and Milestones (POAMs) keep you ready, not just reactive. Your POAM is an operational management tool that you should maintain and leverage to track all of your compliance-related tasks. Use it for logging identified or reported deficiencies, managing compliance-impacting change, and planning for anticipated changes, including NIST 800-171, Rev. 3. Once you have compliance deficiencies entered on your POAM, set deadlines and proactively close out corrective actions.
For example, if a vulnerability cannot be remediated within your defined SLA for high severity findings, it should be formally documented as an exception, with associated risk justification, and tracked in the POAM until it is resolved.
If you want to assess your capabilities and understand from a planning standpoint where you are against the NIST 800-171, Rev. 3 framework, track them as non-compliant deficiencies and put them on the POAM, which allows you to have some readiness ahead of that version being rolled out. Use your POAM proactively for reported changes, and any chaos in your environment that could have compliance impact.
Why CMMC Compliance Is a Continuous Program, Not a One-Time Project
Sustained CMMC compliance requires the same operational discipline you apply to any critical business function. Every process needs a schedule, an owner, defined participants, and an expected output.
CyberSheath works with defense industrial base (DIB) organizations at every stage of the CMMC journey. If you’re looking to formalize your ongoing compliance program or prepare for an upcoming C3PAO assessment, our team is ready to help you get—and stay—audit ready. Contact us today to get started.