Identity governance should include contractors, partners, service accounts, application identities, and automation accounts. Any identity that can authenticate, request access, or hold privileges can create risk if it is not reviewed and revoked with the same discipline as human accounts. That is especially true in hybrid estates.
Why This Matters for Security Teams
identity governance breaks down quickly when it stops at employee accounts. Contractors, partners, service accounts, application identities, and automation accounts often carry broad, persistent access, yet they are reviewed less often than human users. That matters because these identities can authenticate, request access, and move data at machine speed. The NIST Cybersecurity Framework 2.0 treats access governance as a core operational control, not a periodic HR exercise.
NHIMG research shows why this scope matters: the Ultimate Guide to NHIs reports that NHIs outnumber human identities by 25x to 50x in modern enterprises, while 97% carry excessive privileges. In practice, many security teams discover this only after a partner token, service account, or CI/CD credential has already been used to reach systems no employee account should touch.
How It Works in Practice
Identity governance should extend beyond employees because each non-human identity has its own lifecycle, owner, purpose, privilege set, and revocation path. The practical question is not only “who logged in,” but “what identity can act, under what conditions, and who is accountable when it changes.” That means inventorying all identities that can authenticate or hold privileges, then binding each one to an owner, business function, expiration policy, and review cadence.
For human users, governance often relies on joiner-mover-leaver workflows. For non-human identities, the equivalent is closer to asset and secret lifecycle management. Best practice is to classify identities by type:
- Contractor and partner identities tied to external sponsorship and time-bound access.
- Service accounts used by applications, schedulers, and integrations.
- Automation accounts used by scripts, RPA, and CI/CD pipelines.
- Machine or workload identities that prove what a service is, not who a person is.
From there, organisations should enforce least privilege, rotate secrets, and remove orphaned access when the application, vendor relationship, or automation job ends. Current guidance suggests pairing identity governance with secret management and workload identity patterns, rather than relying on static credentials hidden in code or configuration. NHIMG’s lifecycle guidance for NHIs and the OWASP Secrets Management Cheat Sheet both reinforce that review without revocation is not governance.
For implementation, teams commonly map these identities into the same access review process used for employees, then add stricter controls for secrets, API keys, certificates, and service-to-service tokens. These controls tend to break down in hybrid estates where identity owners are unclear and cloud, SaaS, and on-premises systems each keep separate audit records.
Common Variations and Edge Cases
Tighter governance often increases operational overhead, requiring organisations to balance stronger control against delivery speed and partner friction. That tradeoff is real, especially when external teams need access only for short projects or when automation runs continuously.
There is no universal standard for this yet, but current guidance suggests treating every non-employee identity according to risk and replaceability. Long-lived vendor accounts usually deserve formal sponsor approval and recurring recertification. High-volume automation identities may need continuous monitoring rather than quarterly reviews. If a service account cannot be assigned to a named owner, that is usually a sign the identity is already drifting outside governance.
Edge cases also matter. Shared accounts inside legacy applications, embedded credentials in scripts, and machine identities used by ephemeral workloads can look harmless because no person “owns” them in the usual sense. In reality, these are often the hardest to revoke and the easiest to forget. NHIMG’s Top 10 NHI Issues highlights how privilege sprawl and poor rotation become long-term exposure points. In practice, the hardest failures appear when a retired vendor, abandoned integration, or forgotten automation account remains active long after the business relationship ended.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0, NIST SP 800-63 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Identity scope and ownership are core to governing non-employee accounts. |
| NIST CSF 2.0 | PR.AA-01 | Access authorization applies to contractors, partners, and machine identities. |
| NIST SP 800-63 | AAL | Assurance considerations help distinguish human and non-human authentication needs. |
| CSA MAESTRO | IAM | Agentic and service identities need lifecycle controls across trust boundaries. |
| NIST AI RMF | AI systems and automated agents still require accountable identity governance. |
Use the right assurance level for each identity type and avoid human-centric assumptions.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on July 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
