Ownership should follow the application and the risk domain, not a single central team alone. Central identity teams should orchestrate policy, scope, and evidence, while local managers or app owners make the access call when context matters. That model works better than asking IT to guess user need.
Why This Matters for Security Teams
access review ownership becomes messy as soon as one identity can reach multiple applications, tenants, and data domains. A central team can define process, but it usually lacks the business context to judge whether access is still needed. Local app owners, data owners, and managers understand operational need, risk, and exceptions. That split matters because NHIs often carry broad privileges and are difficult to see consistently across estates, as highlighted in the Ultimate Guide to NHIs.
When ownership is unclear, reviews turn into checkbox exercises and stale access survives across environments. The problem is not just process drift; it is that review decisions are being made without the right context for application criticality, tenant boundaries, or dependency chains. Current guidance suggests that governance should be centralized, but decision authority should stay close to the system that can actually assess risk. In practice, many security teams discover overexposure only after an audit, incident, or tenant-specific control failure has already exposed the gap.
How It Works in Practice
The practical model is shared ownership with clear decision rights. Central identity or IAM teams orchestrate the review cycle, define policy, gather entitlements, and prove completion. Application owners, service owners, or delegated managers then make the actual access decision for each app or tenant because they understand whether the identity still needs that access. This is especially important for NHIs, where the key challenges and risks include excessive privilege, poor visibility, and weak offboarding discipline.
In larger environments, the workflow usually looks like this:
- Identity governance defines the review cadence and scope across applications, tenants, and privileged roles.
- Local owners validate business need, approve or revoke access, and record exceptions with justification.
- Central teams enforce evidence capture, escalation paths, and completion SLAs.
- For NHIs, the review should include secret ownership, rotation status, and whether the workload still exists.
Where possible, teams should use the OWASP Non-Human Identity Top 10 to frame common failure modes such as credential sprawl and overprivilege. For multi-tenant services, the reviewer should be the person who can answer whether the specific tenant still needs the entitlement, not a generic IT approver. That becomes more reliable when access data is normalized through lifecycle controls like the NHI Lifecycle Management Guide, which helps tie provisioning, review, rotation, and offboarding together.
These controls tend to break down when one reviewer is asked to approve access across unrelated business units or tenants because they cannot reliably judge operational necessity or delegated risk.
Common Variations and Edge Cases
Tighter review ownership often increases coordination overhead, requiring organisations to balance decision quality against review speed. That tradeoff becomes visible in shared platforms, reseller tenants, and managed service models where one identity may legitimately support many customers. In those cases, best practice is evolving, and there is no universal standard for this yet, but the reviewer should still match the risk domain as closely as possible.
Common edge cases include outsourced operations, emergency access, and platform teams that administer hundreds of tenants. A central team can approve the framework, but the delegated approver may need to change by app, tenant, or privilege tier. If the owner is unavailable, a pre-defined backup should be named in policy rather than defaulting to IT. For high-risk NHIs, approval should also consider whether the identity has standing credentials, whether rotation is overdue, and whether the application is still active.
For programs looking to mature this model, the 52 NHI Breaches Analysis is a useful reminder that weak ownership and delayed revocation repeatedly show up in real incidents. The most durable pattern is not central approval for everything, but central governance with accountable local decisions and clear escalation when the context is ambiguous.
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 address the attack and risk surface, while NIST CSF 2.0 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-08 | Covers access governance and review for non-human identities across systems. |
| NIST CSF 2.0 | PR.AA-04 | Identity access decisions must be governed and reviewed across environments. |
| NIST AI RMF | GOVERN | Accountability for access decisions is a governance requirement for AI-enabled estates. |
Assign app-level owners to approve NHI access and central teams to enforce review evidence and revocation.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 10, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
