How to Prepare for a CMMC Assessment: A Step-by-Step Guide

Preparing for a CMMC assessment is more than reviewing cybersecurity policies before an assessment date. Defense contractors need to understand which requirements apply to them, define their assessment scope, implement the required security practices, maintain evidence, and address gaps before assessing their environment.

The Cybersecurity Maturity Model Certification (CMMC) program evaluates whether organizations in the Defense Industrial Base (DIB) have implemented required protections for Federal Contract Information (FCI) and Controlled Unclassified Information (CUI). As of 2026, the Department of War has suspended the previously scheduled CMMC Phase II requirements, while Phase I self-assessment requirements remain in place.

For organizations preparing for CMMC, the goal is straightforward: understand your requirements, define your environment, validate your controls, and maintain evidence continuously.

 

Key Takeaways

• Confirm the CMMC level and assessment requirements applicable to your contract.
• Define which systems and assets fall within the assessment scope.
• Map requirements to existing security controls.
• Maintain evidence that demonstrates implementation.
• Conduct a readiness assessment before the required assessment.
• Remediate gaps and assign clear ownership.
• Use continuous monitoring and compliance automation to maintain readiness.

 

What Is a CMMC Assessment?

A CMMC assessment evaluates whether an organization has implemented the cybersecurity requirements applicable to its CMMC level and assessment scope.Under the current Phase I implementation:

 

Level	Core Requirements	Current Assessment
Level 1	15 requirements under FAR 52.204-21	Annual self-assessment
Level 2	110 requirements from NIST SP 800-171 Rev. 2	Self-assessment every three years + annual affirmation

 

Current DoW guidance states that Level 2 organizations conduct a self-assessment every three years, enter the results into SPRS, and provide an annual affirmation of compliance. Limited POA&M use is permitted for applicable Level 2 requirements, subject to program conditions and closeout requirements.

Because CMMC implementation can change, organizations should verify the requirements specified in their current solicitation or contract rather than relying on older CMMC timelines.

For a deeper understanding of CMMC requirements and assessment preparation, explore Akitra’s Everything You Need to Know About CMMC 2.0 course.

 

How Do You Prepare for a CMMC Assessment?

The most effective approach is to work through CMMC preparation in a defined sequence: determine requirements, define scope, assess controls, organize evidence, remediate gaps, and validate implementation.

1. Confirm Which CMMC Requirements Apply

Start with the contract and solicitation.

Determine:

• Which CMMC level applies
• Whether the organization handles FCI, CUI, or both
• Which assessment requirements apply
• Which systems and services are involved
• Whether requirements flow down to subcontractors

For Level 1, organizations address 15 requirements under FAR 52.204-21.

For Level 2, organizations address 110 requirements from NIST SP 800-171 Revision 2.

Do not start by fixing everything at once. First establish exactly what your organization is required to demonstrate.

2. Define Your CMMC Assessment Scope

Next, determine where CUI exists and which systems support it.
Identify where CUI is:

• Stored
• Processed
• Transmitted

Then document the systems, users, infrastructure, facilities, and external services connected to that environment.

Your scope should account for:

• CUI data flows
• System boundaries
• User access
• Network infrastructure
• External service providers
• Security responsibilities

A clearly defined scope prevents two costly mistakes: assessing systems that do not need to be assessed and overlooking systems that do.

3. Map CMMC Requirements to Existing Controls

With the scope defined, create a requirement-to-control matrix.

 

Field	What to Record
Requirement	Applicable CMMC requirement
Status	Met, partially met, or not met
Owner	Responsible person or team
Implementation	How the requirement is addressed
Evidence	Supporting documentation or technical evidence
Gap	What is missing
Remediation	Action required

 

This gives security and compliance teams a practical view of their current posture instead of forcing them to manage requirements through disconnected spreadsheets.

Compliance automation can help centralize requirements, controls, evidence, and remediation workflows.

4. Build and Organize Your Evidence

A security control is difficult to defend if you cannot demonstrate that it exists and operates as required.

Depending on the requirement, evidence may include:

• Security policies and procedures
• System Security Plans (SSPs)
• Configuration records
• Access reviews
• Training records
• Risk assessments
• Vulnerability management records
• Incident response documentation
• Audit logs

CMMC assessment activities can involve examination, interviews, and testing, so organizations need to demonstrate more than documentation, they need to show that security practices are actually implemented.

Akitra’s guidance on automated evidence collection explains how automation and continuous monitoring can reduce the manual work involved in maintaining compliance evidence.

Best practice: collect evidence as part of normal operations rather than scrambling to assemble it immediately before an assessment.

5. Conduct a CMMC Readiness Assessment

Before the required assessment, perform an internal review against every applicable requirement.

Classify each requirement as:

• Met
• Partially met
• Not met
• Evidence missing

Then prioritize the gaps that create the greatest security or compliance exposure.

Ask one question for every requirement:

If an assessor asked us to demonstrate this today, could we prove that it is implemented?

If the answer is no, the requirement needs further work.

6. Remediate Security Gaps

Once gaps are identified, assign an owner and remediation plan to each one.

For every gap, define:

1. What is missing?
2. Who owns the fix?
3. What needs to change?
4. What evidence will demonstrate completion?
5. When will it be completed?

CMMC permits limited use of Plans of Action and Milestones (POA&Ms) for applicable Level 2 requirements. Current DoW guidance states that permitted Level 2 POA&M items must be closed within 180 days.

A POA&M should not become an excuse to postpone important security work. The objective should be to reduce risk and achieve sustainable compliance.

7. Validate That Controls Work in Practice

Having a policy is not the same as having effective control.

 

Before assessment, test scenarios such as:

• Can terminated users be removed appropriately?
• Are security logs generated and retained?
• Can employees explain incident reporting procedures?
• Are vulnerabilities identified and addressed?
• Can the organization produce evidence of required reviews?
• Do actual configurations match documented policies?

Testing controls before an assessment gives organizations an opportunity to fix weaknesses before they become assessment findings.

Continuous compliance training can help teams maintain visibility into changing controls and compliance posture between formal assessments.

8. Prepare Employees and Control Owners

CMMC is not only an IT responsibility.

Relevant employees should understand:

• Their security responsibilities
• How CUI is handled
• Incident reporting procedures
• Access control processes
• Applicable security policies
• Their role in maintaining compliance

Employees should understand the processes they own rather than memorize scripted answers.

9. Perform a Final Pre-Assessment Review

Before the assessment begins, conduct one final review:

• CMMC level confirmed
• Assessment requirements confirmed
• CUI environment identified
• Assessment scope documented
• Requirements mapped to controls
• Control owners assigned
• Evidence organized
• Readiness assessment completed
• Gaps remediated or appropriately documented
• Controls tested
• Relevant employees prepared

The objective is simple: avoid surprises during the assessment.

 

Common CMMC Assessment Preparation Mistakes

Treating CMMC as a Documentation Exercise

A policy does not prove that a security control works.

Better approach: Connect every requirement to its implementation, owner, and supporting evidence.

Starting Before Defining Scope

Organizations can waste time assessing systems outside scope while missing systems that matter.

Better approach: Map CUI flows and system boundaries first.

Collecting Evidence at the Last Minute

Last-minute evidence collection can expose missing records and inconsistent documentation.

Better approach: Make evidence collection part of regular compliance operations.

Ignoring Continuous Changes

Cloud environments, users, configurations, vendors, and infrastructure change regularly.

Better approach: Use continuous compliance monitoring to identify changes that could affect security and compliance.

Treating Assessment as the Finish Line

CMMC requires organizations to maintain their compliance posture beyond a single assessment.

Better approach: Build recurring monitoring, evidence collection, and remediation into normal security operations.

 

How Automation Can Support CMMC Readiness

CMMC preparation can create substantial manual work across security, IT, compliance, and business teams.

Compliance automation can help organizations:

• Centralize requirements
• Map controls to requirements
• Track control status
• Collect and organize evidence
• Monitor controls continuously
• Assign remediation tasks
• Track compliance changes
• Maintain audit-ready records

The goal is not simply to automate paperwork. It is to maintain a current view of security and compliance posture so teams can identify issues before they become assessment problems.

Akitra also provides free online Academy courses covering security and compliance topics for organizations building stronger compliance programs.

 

How Akitra Can Help

Akitra’s Andromeda® platform brings Security, Compliance, Risk, and Pentesting together in one connected system. Akitra also supports CMMC and NIST 800-171 among its broader compliance framework coverage.

For organizations managing CMMC and other compliance requirements, Akitra supports capabilities around compliance automation, continuous monitoring, risk management, and automated evidence collection.

Instead of relying entirely on disconnected spreadsheets and periodic reviews, teams can centralize compliance activities, track remediation, and maintain greater visibility into their security posture.

 

CMMC Assessment Checklist

• Confirm applicable CMMC level
• Define CUI and assessment scope
• Map requirements to controls
• Assign control owners
• Organize evidence
• Conduct a readiness assessment
• Identify and prioritize gaps
• Remediate applicable gaps
• Test controls
• Prepare relevant employees
• Complete final evidence review
• Establish ongoing monitoring

 

Conclusion

A successful CMMC assessment starts with understanding your requirements, defining your scope, maintaining evidence, and addressing gaps early. Treating CMMC as an ongoing compliance process, supported by continuous monitoring and automation, helps organizations stay assessment-ready.

Ready to simplify compliance? Explore [Akitra Andromeda] to see how automation can help manage security, compliance, and risk.

 

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