NIST SP 800-53 Rev. 5 MA-5 — Maintenance Personnel

What this control requires

Establish a process to authorize Maintenance personnel, maintain a list of authorized entities, verify non-escorted personnel's access authorizations, and designate competent personnel to supervise Maintenance activities. This control supports the Access Control System capability within the Maintenance family.

In plain English

Establish a process to authorize Maintenance personnel, maintain a list of authorized entities, verify non-escorted personnel's access authorizations, and designate competent personnel to supervise Maintenance activities. In practice, this means you can prove you policy management-level controls on a defined cadence.

Why it matters

SP 800-53 is the catalogue every U.S. federal authorisation (FedRAMP, FISMA, CMMC) and most regulated industries point at. A missing control surfaces as a Plan of Action & Milestones (POA&M) item that an Authorizing Official must approve before the Authority To Operate is granted or renewed.

This control is rated high. Auditors expect a named owner, a remediation SLA, and a tooling artefact that evidences continuous operation.

What an auditor looks for

A 3PAO (FedRAMP) or Independent Assessor (NIST RMF) tests against NIST SP 800-53A assessment procedures. For each control they expect a documented implementation that addresses every assessment objective (Examine, Interview, Test) and an implementation summary in the System Security Plan.

Within Maintenance, the assessor will trace your implementation back to the catalogue reference (Control MA-5) and look for objective evidence on the latest two assessment cycles.

How to implement

Policy Management

Docs. Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA.

Operational checklist

• Policy. Document the trigger, the owner and the cadence.
• Access. Document the trigger, the owner and the cadence.
• Process. Document the trigger, the owner and the cadence.
• Authorize. Document the trigger, the owner and the cadence.
• Maintenance. Document the trigger, the owner and the cadence.
• Scope: management, access control, access authorizations, system, personnel, identity, maintenance, capability.

Evidence to collect

• Policy Document. A signed and version-controlled policy / standard / procedure document.

Signed policy or standard documents the safeguard. Focus: Maintenance Personnel.

Common pitfalls

• Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

• NIST SP 800-171 Rev. 3 3.7.6 — Maintenance Personnel
• HIPAA (45 CFR Part 164) 164.310(a)(2)(iv) — Facility Access Controls - Maintain Maintenance Records
• CIS Controls v8 6.8 — Define and Maintain Role-Based Access Control

Related controls in NIST SP 800-53 Rev. 5

• Control AC-16(4) — Association Of Attributes By Authorized Individuals
• Control MA-5(5) — Non-System Maintenance
• Control AC-16(2) — Attribute Value Changes By Authorized Individuals
• Control MA-5(1) — Individuals Without Appropriate Access
• Control MA-5(2) — Security Clearances For Classified Systems
• Control AC-16(6) — Maintenance Of Attribute Association

References

• NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
• Catalogue identifier: Control MA-5

Topics: governance riskidentity accesspolicy management