NIST 800-53 assessments, from control gaps to ATO.
Federal systems live or die by their Authority to Operate. SubRosa's certified assessors evaluate your controls against every NIST 800-53 family, align your risk management to the NIST RMF, and prepare the POA&M and documentation your ATO depends on, so agencies and contractors get to compliance without guesswork.
NIST 800-53 · FISMA · NIST RMF · POA&M · ATO
What is NIST 800-53?
NIST 800-53 is the catalog of security and privacy controls that federal information systems must implement to protect government data. It is the backbone of FISMA compliance and the NIST Risk Management Framework (RMF), organized into control families, from access control to incident response, each with a baseline (low, moderate, or high) matched to a system's impact level. For federal agencies and contractors, a NIST 800-53 assessment is the path to an Authority to Operate (ATO): it documents which controls are implemented, where the gaps are, and how you'll close them.
Every control family, mapped to your ATO.
A complete evaluation of your NIST 800-53 program, built for federal requirements.
Control assessment
Certified assessors evaluate every applicable NIST 800-53 control family against your baseline, documenting implementation and evidence.
RMF & risk management
Risk assessment and management aligned to the NIST Risk Management Framework, so your program satisfies the RMF steps end to end.
POA&M & ATO preparation
A comprehensive Plan of Action and Milestones and full documentation support to prepare and maintain your Authority to Operate.
Policy & ongoing support
Policy development, leadership training, and continuous monitoring support to keep controls compliant as requirements evolve.
Federal compliance, done right.
Certified NIST assessors
Certified assessors who work in NIST 800-53 and the RMF every day, so agencies and contractors get an assessment that holds up to federal scrutiny.
Built for ATO
We prepare the POA&M, evidence, and documentation your Authority to Operate depends on, and guide you through the process end to end.
Continuous monitoring
Ongoing support and continuous monitoring, so you maintain compliance and adapt as controls and baselines are updated.
NIST 800-53 controls, tracked to your ATO.
Sable maps your controls to the NIST 800-53 families and baselines, tracks your POA&M, and collects evidence continuously, so your ATO package is assembled as you go, not reconstructed under deadline.
- 42 / 45Access Control (AC)3 POA&M
- 16 / 16Audit & Accountability (AU)Complete
- 38 / 44System & Comms (SC)6 POA&M
- 9 / 9Incident Response (IR)Complete
Get to your ATO, and keep it.
Let's assess your NIST 800-53 controls and map the fastest path to Authority to Operate.