What Is a C3PAO? CMMC Third-Party Assessor Organizations

What a C3PAO Does

• Conducts Level 2 certification assessments against the 110 NIST SP 800-171 Rev 2 requirements
• Evaluates MET / NOT MET outcomes and Conditional eligibility under programme rules
• Produces assessment results that feed SPRS / CMMC status workflows

What a C3PAO Is Not

• Not required for Level 1 (self-assessment)
• Not the Level 3 assessor (DIBCAC)
• Not automatically required during Phase II suspension for new designations (Self only)
• Not a substitute for your SSP accuracy or DFARS 7012 incident duties

How OSCs Should Prepare

1. Freeze scope and asset inventory
2. Complete SSP mapped to all 110 requirements
3. Stage evidence by domain (see 14 domains)
4. Rehearse interviews for system owners
5. Know POA&M eligibility and 180-day closeout rules

How CyberSilo Helps

• Pre-assessment evidence organization in CSA
• Operational AU proof via ThreatHawk
• Referrals mindset: we help you be assessable, not assessed by us

Frequently Asked Questions

Do I need a C3PAO for Level 1?

No. Level 1 is self-assessment against 15 FAR 52.204-21 requirements.

Is CyberSilo a C3PAO?

No. CyberSilo provides CSA automation, SIEM evidence, and readiness coaching.

Who assesses Level 3?

DCMA DIBCAC, after you hold the required Level 2 C3PAO prerequisite.

Related CMMC Resources

CMMC hub · Assessment process · Level 2 · Level 3 · Cost