Application owners, business managers, and control owners should be accountable for the decision itself, while IAM or IGA teams should provide the evidence and workflow. Auditors usually care less about the tool and more about whether decisions are documented, defensible, and actually enforced.
Why This Matters for Security Teams
For SOX and iso 27001, access review accountability is not just an IAM housekeeping question. It is a control ownership question. The reviewer must be able to judge whether access still matches job need, whether segregation of duties is broken, and whether exceptions are accepted by the right business authority. IAM and IGA teams can run the workflow, but they should not be the ones deciding business necessity on behalf of the control owner. That distinction is what makes the review defensible to auditors and usable during remediation.
For non-human access, the stakes are even higher because service accounts, API keys, and automation tokens tend to outlive the people and projects that created them. NHI Mgmt Group research shows that Ultimate Guide to NHIs reports only 5.7% of organisations have full visibility into their service accounts, which means a review process can look complete while still missing entire classes of privilege. OWASP’s OWASP Non-Human Identity Top 10 similarly treats ownership, rotation, and excessive privilege as core risks, not optional hygiene. In practice, many security teams discover reviewer gaps only after an auditor asks who actually signed off on the decision, rather than through the review itself.
How It Works in Practice
The cleanest operating model is simple: the business or application owner owns the decision, while IAM, IGA, or control operations owns the process evidence. That means the reviewer confirms whether the identity still needs access, whether the privilege level is appropriate, and whether any compensating controls exist. The workflow system should capture the approver, timestamp, rationale, and remediation outcome. For SOX, the evidence needs to be traceable enough to support financial reporting controls. For ISO 27001, it should map to access control governance and periodic review expectations.
For NHI access, the same pattern applies, but the decision often needs input from a technical control owner because the “user” may be a pipeline, workload, or agent rather than a human. The NHI Lifecycle Management Guide emphasizes that access should be tied to lifecycle events such as onboarding, rotation, and offboarding. That is important because a reviewer cannot meaningfully approve what they cannot see. NHI Mgmt Group’s 52 NHI Breaches Analysis shows how often privilege persists after the original purpose has ended.
- Assign the final approve or revoke decision to the control owner, not the IAM administrator.
- Use IAM or IGA tooling to present entitlements, last-used data, and privilege deltas.
- Require written justification for exceptions, especially for privileged or shared accounts.
- Make remediation enforceable, so revocations happen after review and not just in a report.
Current guidance suggests that controls work best when the evidence trail is separate from the decision authority, but they tend to break down in highly delegated engineering environments where technical owners and business owners are not clearly defined because no one can approve removal of access with confidence.
Common Variations and Edge Cases
Tighter review governance often increases operational overhead, requiring organisations to balance auditability against delivery speed. That tradeoff is real, especially in DevOps and platform teams where access changes frequently and approval chains can slow incident response. Best practice is evolving, and there is no universal standard for this yet, but many organisations separate steady-state access reviews from emergency access and JIT exceptions so the control does not become unusable.
One common edge case is delegated administration. Here, a platform lead may own the access decision for a shared service, while a security or compliance manager owns the control quality. Another is autonomous or agentic workloads, where the account behaves more like a workload identity than a human user. In those cases, accountability may sit with the product owner, system owner, or the team that operates the workflow, but the evidence still needs to show who approved the risk and why. The Ultimate Guide to NHIs — Key Challenges and Risks is useful here because it frames excessive privilege and poor visibility as governance problems, not just technical misconfigurations.
Where organisations get into trouble is assuming the tool can be the reviewer. It cannot. Tools can surface stale access, but only accountable owners can decide whether the access should remain.
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-01 | Ownership and accountability are central to non-human identity governance. |
| NIST CSF 2.0 | PR.AC-4 | Access permissions must be managed and reviewed with clear accountability. |
| NIST AI RMF | Autonomous and agentic workloads need explicit governance and accountability. |
Define decision authority, evidence, and escalation paths for any autonomous or workload identity access.
