FedRAMP System Security Plan (SSP) Template and Guide

Core SSP Sections

• System name, unique ID, and authorization boundary diagram
• System categorization (Low / Moderate / High) and information types
• Roles, contacts, and shared-responsibility matrix
• Control implementation summaries and detailed narratives
• Inheritance / customer-responsibility statements
• Attachments: inventory, diagrams, policies, scan evidence indexes

Control Narrative Quality

Assessors look for who, what, where, when, and how — not marketing language. Tie each control to owners, tools (e.g. ThreatHawk for AU), configurations, and artefacts. For Rev 5 Moderate expect coverage against the 323-control baseline; Low 156 and High 410 change the narrative volume accordingly.

Lightweight Outline You Can Copy

1. System overview & mission
2. Authorization boundary & data flows
3. Impact level rationale
4. Ports, protocols, services
5. Control family implementations (AC, AU, CM, CP, IA, IR, RA, SC, SI, …)
6. Continuous monitoring approach
7. POA&M process summary
8. Appendices & evidence index

How CyberSilo Helps

• Evidence workflows for SSP, POA&M, and control status via Compliance Standards Automation
• ThreatHawk SIEM for AU-family logging, ConMon telemetry, and investigation evidence
• Advisory scoping for readiness, baseline selection, and agency-path planning — contact CyberSilo

Frequently Asked Questions

Is there one official SSP Word file forever?

FedRAMP publishes templates that evolve; 20x also pushes machine-readable evidence. Start from the current official package for your path.

Can we reuse SOC 2 policies as SSP text?

Policies help, but FedRAMP needs control-level implementation narratives mapped to the FedRAMP baseline — not a SOC 2 report paste.

Who owns the SSP?

The CSP owns the SSP. Advisors and tools can draft; leadership must approve accuracy of the boundary and implementations.

Related FedRAMP Resources

Checklist · ConMon · AU logging · Hub