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Winning defense contracts increasingly depends on more than technical capabilities, pricing, and past performance. Organizations are also expected to protect sensitive information and meet evolving cybersecurity requirements.
For many defense contractors, Cybersecurity Maturity Model Certification (CMMC) is now part of the contracting process. Knowing what is required, which level applies, and how certification works can help organizations prepare for future opportunities.
This guide explains the CMMC program, certification requirements, assessment process, and the steps defense contractors can take to prepare for compliance.
TL;DR
- CMMC is the DoD's cybersecurity program for contractors and subcontractors that handle FCI or CUI.
- The program is being rolled out in phases through 2028, and CMMC requirements are already appearing in some DoD solicitations and contract awards.
- Most defense contractors will fall under CMMC Level 1 or Level 2, with Level 2 applying to organizations that handle CUI and requiring controls based on NIST 800-171.
- Preparing for certification typically involves identifying systems that handle CUI, performing a gap analysis, developing SSPs and POA&Ms, implementing controls, and training personnel.
- CMMC is not a one-time project. Annual affirmations, ongoing monitoring, documentation management, and continuous compliance activities are required to maintain eligibility.
- MotherBear helps defense contractors manage requirements, evidence, SSPs, POA&Ms, remediation activities, and assessment readiness from a single platform.
What Is Cybersecurity Maturity Model Certification?
CMMC is a cybersecurity framework developed by the Department of Defense (DoD).
It establishes a set of cybersecurity requirements that organizations must meet when handling Federal Contract Information (FCI) and Controlled Unclassified Information (CUI).
The CMMC program includes multiple certification levels and assessment requirements designed to verify compliance with specific cybersecurity standards.
Depending on the applicable CMMC level, organizations may be required to complete a self-assessment or undergo an independent assessment.
CMMC applies to defense contractors, subcontractors, and other organizations that support DoD contracts.
The required certification level depends on the type of information involved and the requirements associated with a particular contract.
Why CMMC Matters for Defense Contractors
CMMC is closely tied to how the DoD evaluates cybersecurity requirements for contractors and subcontractors.
As the program continues to roll out, organizations may need to demonstrate their CMMC status before receiving certain contract awards.
Many defense contractors handle CUI and FCI as part of their work. The CMMC program defines security requirements intended to protect that information from unauthorized access, disclosure, and other cyber threats.
CMMC also plays a role in cybersecurity efforts throughout the Defense Industrial Base (DIB).
The framework sets common cybersecurity standards for contractors and subcontractors and supports a more secure defense supply chain. These requirements help reduce risks to national security.
Current CMMC Rule and Rollout Timeline
CMMC is governed by two key rules that establish both the program requirements and how those requirements are incorporated into DoD contracts.
The final rule under 32 CFR Part 170 became effective on December 16, 2024, formally establishing the CMMC implementation timeline.
The publication of the DFARS acquisition rule (48 CFR) in the Federal Register on September 10, 2025, enabled the integration of CMMC requirements into Department of Defense contracts.
CMMC is being implemented through a four-phase rollout that began on November 10, 2025, and continues through November 10, 2028.
- We are currently in Phase 1, during which applicable contracts may require Level 1 or Level 2 self-assessment requirements.
- Phase 2, effective November 10, 2026, mandates Level 2 certification through an authorized third-party assessment for a broad range of contracts involving CUI.
- Phase 3 begins on November 10, 2027, expanding the use of CMMC requirements in DoD solicitations and contracts.
- Phase 4 starts on November 10, 2028, when the full CMMC program is expected to be implemented across applicable contracts.
For defense contractors, the most important takeaway is that CMMC requirements are already appearing in solicitations and contract awards.
Organizations that handle FCI or CUI should determine their applicable CMMC level, evaluate their current CMMC status, and address any gaps before certification becomes a condition of award.
CMMC Framework and Requirements
The CMMC framework is built on existing cybersecurity requirements rather than an entirely new set of standards.
For defense contractors, the primary foundation is NIST 800-171, which establishes security requirements for protecting CUI within nonfederal systems and organizations.
However, CMMC goes beyond simply defining requirements. The framework also introduces assessment and certification requirements designed to verify compliance with the applicable CMMC level.
This gives the DoD greater assurance that organizations are implementing the cybersecurity practices required for their contracts.
At a practical level, CMMC assessment evaluates whether required security controls are implemented and operating as intended.
These controls cover areas such as access control, identification and authentication, incident response, physical protection, system and communications protection, and other measures used to protect sensitive information.
CMMC Levels Explained
Not every defense contractor is subject to the same CMMC requirements.
The framework includes three levels, with each level corresponding to the sensitivity of the information involved and the cybersecurity requirements that apply to a particular contract.
CMMC Level 1
Level 1 is intended for organizations that handle FCI but do not process, store, or transmit CUI. The requirements focus on basic safeguarding practices designed to protect information used in support of government contracts.
Organizations pursuing Level 1 complete an annual self-assessment and submit the required affirmation.
This level is typically associated with contractors handling less sensitive information and does not require a third-party assessment.
CMMC Level 2
Level 2 applies to organizations that handle CUI and represents the level most defense contractors will encounter.
The requirements are based on NIST 800-171 and include a broader set of cybersecurity controls covering areas such as access control, incident response, configuration management, and physical protection.
Depending on contract requirements, organizations may complete a self-assessment or undergo an assessment performed by a Certified Third-Party Assessment Organization (C3PAO).
For contractors handling CUI, Level 2 is often the applicable CMMC level.
CMMC Level 3
Level 3 is reserved for a smaller group of organizations that support higher-priority DoD programs and handle more sensitive information.
In addition to meeting Level 2 requirements, these organizations must satisfy additional security requirements derived from NIST 800-172.
Unlike Levels 1 and 2, Level 3 involves government-led assessments and is intended to provide greater assurance against advanced persistent threats and other complex cyberattacks. Most contractors and subcontractors will not require Level 3 certification.
How Defense Contractors Prepare for CMMC Certification and Maintain Eligibility
Preparation usually starts well before an assessment is scheduled. Organizations seeking assessment often begin by determining their appropriate CMMC level, reviewing current cybersecurity compliance efforts, and identifying areas that require remediation.
1. Identify Systems Handling CUI
Start by identifying where CUI is stored, processed, or transmitted. This helps define the assessment scope and determines which systems, users, assets, and business processes fall under CMMC requirements.
2. Perform a Gap Analysis
Compare your current cybersecurity practices against the requirements associated with your appropriate CMMC level.
A gap analysis helps organizations address gaps, identify missing controls, and develop a remediation plan before an assessment begins.
3. Develop SSPs and POA&Ms
Document the current state of your environment in a System Security Plan (SSP) and record outstanding remediation work in a Plan of Action and Milestones (POA&M).
These documents help assessors verify compliance and are commonly reviewed during assessment preparation and close out assessment activities.
4. Implement Required Controls
Address identified gaps and implement the security controls required for your CMMC level.
Controls should align with applicable CMMC standards and support the organization's ability to protect sensitive data and other sensitive unclassified information.
5. Train Personnel
Employees, system owners, and other stakeholders should understand their responsibilities, follow documented procedures, and participate in security awareness training appropriate to their roles.
Ongoing training supports continuous compliance and helps maintain security after certification has been achieved.
6. Maintain Assessment Records and SPRS Status
Organizations should maintain assessment records and ensure required information is submitted to the Supplier Performance Risk System (SPRS) when applicable.
Keeping records current can help support future contract opportunities, maintain eligibility, and demonstrate readiness to contracting officers.
Maintaining CMMC Compliance
Achieving certification is not the end of the process. The CMMC model is built around ongoing cybersecurity compliance, which means organizations must continue meeting requirements after an assessment has been completed.
Annual Affirmations
After certification, certain organizations must submit annual affirmations confirming that required security practices remain in place. These affirmations help maintain current CMMC status and support continued eligibility for applicable contracts.
Ongoing Monitoring
Over time, systems, users, vendors, and business processes change. As a result, organizations should periodically review their environment to identify new risks, maintain security, and ensure compliance with applicable requirements.
Documentation Management
In addition, documentation should be kept current. Policies, procedures, SSPs, POA&Ms, and assessment records all play a role in demonstrating compliance and supporting future assessments.
Up-to-date records can also make it easier to respond to requests from customers, assessors, and government agencies.
Continued Compliance Activities
Finally, organizations should review controls, address newly identified gaps, and update documentation when systems or business processes change.
For many government contractors, continuous compliance becomes part of normal operations rather than a one-time certification effort.
This approach can help reduce contract risk and maintain a competitive advantage as CMMC requirements become more common throughout the DoD supply chain.
When questions arise, organizations often seek expert guidance from consultants, assessors, or other compliance professionals to help ensure compliance with evolving requirements.
MotherBear Supports CMMC Compliance for Defense Contractors
Defense contractors need to manage evidence, SSPs, POA&Ms, and assessment readiness while keeping documentation organized and current.
MotherBear brings these activities into a single platform, helping teams track requirements, manage compliance records, and maintain visibility throughout their CMMC program.
Book a demo to see how MotherBear helps defense contractors prepare for assessments and maintain CMMC compliance.
FAQs about CMMC for Defense Contractors
What companies need CMMC certification?
Organizations that support DoD contracts and handle FCI or CUI may need to comply with CMMC. This includes defense contractors, subcontractors, manufacturers, technology providers, research organizations, universities, and other companies working within the Defense Industrial Base (DIB).
Is CMMC required for DoD contracts?
Yes, many DoD contracts will require CMMC as the phased implementation continues. The required certification level depends on the contract and the type of information involved.
Does CMMC apply to subcontractors?
Yes, CMMC can apply to subcontractors when contract requirements flow down from prime contractors. The required level depends on the work being performed and whether the subcontractor handles FCI, CUI, or other contract-related information.
How long does CMMC last?
CMMC is not permanent. Organizations must maintain required security practices, complete any required affirmations, and remain compliant with applicable requirements to keep their certification status in good standing.
