CMMC Policies and Procedures: What Documentation You Need

Policies and procedures form the foundation of CMMC compliance. Without documented rules and processes, you cannot demonstrate that your security controls are intentional, consistent, and repeatable. Assessors do not just check whether controls exist—they verify that you have established formal requirements for how those controls operate.

CMMC stands for Cybersecurity Maturity Model Certification—the DoD’s mandatory cybersecurity program for defense contractors.

This guide explains what policies and procedures CMMC requires and how to build a documentation framework that supports your certification.

Why Documentation Matters for CMMC

Documentation serves multiple purposes in CMMC compliance:

Demonstrates Intent

Policies show that security controls are deliberate organizational decisions, not accidental configurations. A policy requiring multi-factor authentication proves MFA is a planned control, not something someone enabled randomly.

Ensures Consistency

Procedures ensure controls operate the same way every time, regardless of who performs the task. Without documented procedures, each person does things differently, creating gaps and inconsistencies.

Enables Assessment

Assessors cannot observe every security activity in your organization. They rely on documentation to understand how controls are supposed to work, then verify implementation matches documentation.

Supports Continuity

When employees leave, documented procedures ensure institutional knowledge is not lost. New staff can follow established processes without reinventing them.

Policies vs. Procedures vs. Standards

Understanding the difference helps you create appropriate documentation:

Policies

High-level statements of organizational intent and requirements.

Example: “All users must authenticate using multi-factor authentication before accessing systems containing CUI.”

CUI stands for Controlled Unclassified Information—sensitive government data requiring protection.

Policies answer “what” and “why”—what is required and why it matters.

Standards

Specific technical requirements that implement policies.

Example: “Passwords must be at least 12 characters, include uppercase, lowercase, numbers, and special characters, and cannot match the previous 24 passwords.”

Standards answer “how much” or “how strong”—the specific parameters for implementation.

Procedures

Step-by-step instructions for performing tasks.

Example: “To create a new user account: 1) Verify approved access request form is signed by manager. 2) Open Active Directory Users and Computers. 3) Navigate to the appropriate organizational unit…”

Procedures answer “how”—the exact steps to follow.

Core Documentation Requirements

CMMC requires documentation across all control families. Here are the essential documents:

System Security Plan (SSP)

The cornerstone document describing your entire security program:

• System boundary and scope
• How each CMMC requirement is implemented
• Roles and responsibilities
• System architecture and data flows
• Security controls in place

Every Level 2 contractor needs a comprehensive SSP. Level 1 contractors benefit from a simplified version.

Plan of Action and Milestones (POA&M)

Document security gaps and your plan to address them:

• Identified weaknesses
• Remediation steps planned
• Responsible parties
• Target completion dates
• Resources required

If you have any gaps during assessment, a POA&M tracks your path to full compliance.

Security Policies

Formal policy documents covering each control family:

Control Family	Policy Topics
Access Control	Account management, access authorization, and remote access
Awareness and Training	Training requirements, security awareness
Audit and Accountability	Logging requirements, log review, retention
Configuration Management	Baseline configurations, change control
Identification and Authentication	Password requirements, MFA
Incident Response	Incident handling, reporting procedures
Maintenance	System maintenance, remote maintenance
Media Protection	Media handling, sanitization, and disposal
Personnel Security	Screening, termination procedures
Physical Protection	Facility access, visitor management
Risk Assessment	Risk assessment procedures, vulnerability scanning
Security Assessment	Self-assessment, continuous monitoring
System and Communications Protection	Encryption, boundary protection
System and Information Integrity	Malware protection, patching

You can create individual policies per family or combine related families into comprehensive documents.

Operational Procedures

Step-by-step procedures for security operations:

• User account provisioning and deprovisioning
• Access request and approval process
• Incident response procedures
• Backup and recovery procedures
• Patch management process
• Vulnerability scanning procedures
• Log review process
• Visitor management procedures
• Media sanitization procedures

Documentation by CMMC Level

Level 1 Documentation

Level 1 requires less formal documentation:

• Basic security policies covering the 15 requirements
• Simple procedures for key activities
• Evidence of control implementation
• Assessment records

Many Level 1 contractors document everything in a single security plan covering all 15 requirements.

Level 2 Documentation

Level 2 requires comprehensive documentation:

• Full System Security Plan
• Policies addressing all 110 requirements
• Detailed procedures for security operations
• Evidence collection and retention
• POA&M for any gaps
• Continuous monitoring documentation

Building Your Documentation Framework

Step 1: Start with Templates

Do not write from scratch. Start with templates designed for CMMC:

• Adapt templates to your environment
• Ensure templates cover all requirements
• Customize to reflect your actual practices

Step 2: Document What You Actually Do

Policies must reflect reality. Document your actual practices, then identify gaps between current state and requirements.

Do not write aspirational policies describing what you wish you did. Assessors will compare documentation to implementation and find the mismatch.

Step 3: Keep It Practical

Overly complex documentation creates problems:

• Staff cannot follow complicated procedures
• Updates become burdensome
• Implementation drift occurs

Write documentation people can actually use. Clear and concise beats comprehensive and confusing.

Step 4: Establish Version Control

Track document versions:

• Version numbers and dates
• Change history
• Approval signatures
• Review dates

Assessors may ask about document history and when policies were established.

Step 5: Review and Update Regularly

Documentation becomes stale quickly:

• Review policies annually at a minimum
• Update procedures when processes change
• Revise after incidents reveal gaps
• Refresh when technology changes

Common Documentation Mistakes

Mistake 1: Copy-Paste Without Customization

Generic templates used without modification do not reflect your environment. Assessors recognize boilerplate immediately.

Mistake 2: Documentation Without Implementation

Policies nobody follows are worse than no policies—they demonstrate you know what to do but choose not to do it.

Mistake 3: Overly Complex Procedures

If procedures are too complicated to follow, people will not follow them. Keep procedures practical.

Mistake 4: Missing Approval and Dates

Unsigned, undated policies lack authority. Ensure management approval is documented.

Mistake 5: No Evidence Connection

Documentation should connect to evidence. Your log review procedure should reference actual log review records.

Organizing Your Documentation

Create a logical structure that assessors can navigate:

/CMMC Documentation
├── System Security Plan
│   └── SSP v2.1.pdf
├── Policies
│   ├── Access Control Policy.pdf
│   ├── Incident Response Policy.pdf
│   └── [Additional policies]
├── Procedures
│   ├── Account Management Procedure.pdf
│   ├── Patch Management Procedure.pdf
│   └── [Additional procedures]
├── Standards
│   ├── Password Standard.pdf
│   ├── Configuration Standards.pdf
│   └── [Additional standards]
├── POA&M
│   └── Current POA&M.xlsx
└── Evidence
└── [Organized by control family]

Key Takeaways

CMMC requires documented policies and procedures demonstrating that security controls are intentional and repeatable. Core documents include your System Security Plan, security policies for each control family, operational procedures, and POA&M for any gaps.

Start with templates, but customize them to reflect your actual environment and practices. Keep documentation practical and maintainable. Review and update regularly.

Documentation is not just for assessors—it is the foundation that ensures your security program operates consistently.

Related Articles:

• How to Write a System Security Plan for CMMC
• Creating a Plan of Action and Milestones
• CMMC Level 1 Self-Assessment Guide
• Essential Tools for CMMC Compliance
• NIST SP 800-171 Rev 2
• 32 CFR Part 170 – CMMC Program Rule

Official Sources: This article is based on NIST SP 800-171 Revision 2, NIST SP 800-171A assessment procedures, and the DoD CMMC Assessment Guides.

Ready to get your policies and documentation in order? Contact Greypike for expert CMMC consulting, or fast-track your Level 1 certification with Obolix—our compliance platform that gets you certified in a week or less.