Ownership should sit with the teams that control identity policy, privileged access, and platform operations, with security and compliance providing oversight. Least privilege spans multiple estates, so no single tool or team can manage it in isolation. Clear accountability is needed for policy design, access approvals, session recording, and periodic review.
Why Least Privilege Governance Cannot Live in One Team
least privilege across cloud and OT platforms fails when it is treated as a single-product problem instead of an operating model. Cloud teams control IAM and workload permissions, OT teams control plant continuity and vendor access, and security teams usually own policy intent and risk acceptance. That division matters because permission sprawl, over-broad service accounts, and emergency access are created in different places but produce the same exposure. NIST CSF 2.0 makes governance explicit, while NHIMG’s Top 10 NHI Issues shows how fast unmanaged non-human access becomes an operational issue.
In practice, many organisations discover ownership gaps only after a platform outage, a vendor escalation, or an audit finding has already exposed who can approve, revoke, and review access.
How Ownership Should Work Across Cloud and OT
The right owner is not a single person but a clearly named governance chain. Identity policy should sit with security architecture or IAM leadership, privileged access operations should sit with the PAM or platform operations team, and business or engineering owners should approve access based on real task need. For OT, the control point often includes plant engineering, safety, and operations because uptime and physical impact change the risk model. Current guidance suggests using one policy standard across estates, then mapping it to separate execution owners.
That model works best when runtime controls enforce intent, not just roles. NIST’s Zero Trust Architecture supports continuous verification, while the OWASP Non-Human Identity Top 10 highlights why static credentials and broad service-account rights are recurring failures. For cloud, that means short-lived access, workload identity, session recording, and periodic review. For OT, it means time-bounded vendor access, dual approval for sensitive changes, and explicit break-glass procedures.
NHIMG’s Ultimate Guide to NHIs - Lifecycle Processes for Managing NHIs is useful here because least privilege is only durable when ownership covers issuance, use, renewal, and revocation, not just initial approval. These controls tend to break down when OT vendors still need remote access during unplanned maintenance because emergency pathways bypass normal review.
Where Governance Usually Breaks Down
Tighter least privilege often increases coordination overhead, requiring organisations to balance reduced blast radius against slower approvals and operational downtime. That tradeoff is real in OT, where production continuity can pressure teams to keep standing access alive longer than intended. Best practice is evolving, but current guidance suggests separating policy ownership from day-to-day exception handling so emergency access does not become normal access.
Two edge cases matter most. First, shared platform teams can accidentally become de facto owners of all exceptions, which weakens accountability and makes reviews ceremonial. Second, environment-specific access in hybrid estates can blur the boundary between cloud and OT, especially when identity federation, remote access brokers, or third-party support channels are involved. In those cases, least privilege governance should be anchored to the system of record for identity policy, with clear handoffs to operations and a documented review cadence. NHIMG’s Ultimate Guide to NHIs - Regulatory and Audit Perspectives is a useful reminder that auditors will ask who approved access, who monitored it, and who proved revocation. The question is not whether one team can manage it all. It is whether every team knows which part of least privilege it owns before access drifts into exception mode.
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 Zero Trust (SP 800-207) and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.OC-02 | Defines governance roles and accountability across security outcomes. |
| NIST Zero Trust (SP 800-207) | PA-1 | Least privilege depends on continuous policy enforcement and verification. |
| OWASP Non-Human Identity Top 10 | NHI-03 | Covers over-privileged non-human identities and weak access governance. |
| CSA MAESTRO | GOV-1 | Agent and workload governance needs clear ownership across platforms. |
| NIST AI RMF | AI governance principles apply when autonomous systems request or change access. |
Use zero-trust policy checks to approve access at request time, not by standing entitlement.
Related resources from NHI Mgmt Group
- Who is accountable for enforcing least privilege across cloud infrastructure during an enterprise migration?
- Who should own least privilege governance across humans and non-human identities?
- Who should own least privilege governance across human and machine identities?
- Who is accountable for maintaining least privilege across human and machine identities in cloud platforms?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on August 28, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
