CMMC Level 3: Expert
The highest CMMC level, with 130+ practices adding NIST SP 800-172 requirements on top of Level 2. Reserved for the most sensitive DoD programs, assessed by the government (DCSA).
CMMC Level 3 is designed for contractors working on the DoD's highest-priority programs — those at greatest risk of attack by advanced persistent threat (APT) actors. It builds on the full 110-control Level 2 baseline by adding a subset of enhanced practices from NIST SP 800-172.
What Level 3 adds to Level 2
- ✓Threat hunting and adversary behavior analysis capabilities
- ✓Enhanced insider threat programs with behavioral analytics
- ✓Proactive penetration testing and red team exercises
- ✓Supply chain risk management with dedicated vetting processes
- ✓Advanced incident response with forensics capabilities
Government-led assessment
Unlike Level 2, Level 3 assessments are not conducted by commercial C3PAOs. They are led by the Defense Counterintelligence and Security Agency (DCSA). As of mid-2026, the Level 3 assessment process is still being finalized and has not yet been deployed in contracts, pending the Phase 3 rollout.
Who needs Level 3?
Prerequisite: Level 2 first
An organization cannot achieve Level 3 certification without first holding an active Level 2 certification from a C3PAO. The DCSA assessment process validates the Level 2 foundation before proceeding to evaluate the Level 3 enhancements.
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