C3PAO
Guernsey
Guernsey is a C3PAO that lists assessments, gap assessments and remediation for defense companies. Guernsey states its headquarters as Oklahoma City, Oklahoma. Verify authorization on the Cyber AB Marketplace before you hire.
Firm states: Guernsey was among the first organizations in the country to achieve C3PAO status and remains the only Oklahoma-based Certified Third-Party Assessment Organization (C3PAO), which authorizes the firm to provide CMMC assessments, or "audits," for clients seeking certification to meet their contractual obligations.
SourceOct 15, 2026
Headquarters stated by the firm: Oklahoma City, Oklahoma. Source Oct 15, 2026
Services the firm lists
- Assessments
- Gap assessments
- Remediation
Industries the firm lists
- Defense
Verify authorization on the Cyber AB Marketplace
Authorization can change. Always verify on the Cyber AB Marketplace before you hire.