They should use one governed identity record, one lifecycle process, and one approval model wherever possible. Fragmented handling creates inconsistent access evidence and makes audits harder to defend. The goal is not to treat every identity the same in policy detail, but to make the control model consistent enough that review, revocation, and ownership are always traceable.
Why This Matters for Security Teams
Public-sector identity sprawl is not just an admin problem. When employees, contractors, and service account are handled through different approval paths, different owners, and different evidence trails, the result is uneven access control and weak auditability. NIST Cybersecurity Framework 2.0 stresses governance and traceability as core outcomes, and that matters because auditors rarely accept “the process differed by identity type” as a control rationale.
For NHI Management Group, the practical lesson is simple: governance must be consistent even when policy details vary. A single identity record and lifecycle view makes it easier to prove who approved access, who owns it, and when it was revoked. That is especially important for service accounts, which are often overlooked until a breach or audit exposes them. NHIMG data shows only 5.7% of organisations have full visibility into their service accounts, and 20% have formal offboarding and revocation processes for API keys, which is why fragmented handling remains a recurring failure mode. See Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs and NIST Cybersecurity Framework 2.0.
In practice, many security teams discover inconsistent revocation only after a contractor leaves or a service account is reused without a clear owner.
How It Works in Practice
The most defensible model is one governed identity record per subject, with separate attributes for identity type, sponsor, role, entitlement scope, and lifecycle status. That means a contractor can be processed through the same intake, approval, recertification, and offboarding workflow as an employee, while still applying different policy rules where required. The same pattern should extend to service accounts, even if the control checks differ. Current guidance suggests treating service accounts as governed identities, not technical leftovers.
Operationally, this usually means three things:
- One authoritative source of record for ownership, sponsor, and business justification.
- One lifecycle workflow for joiner, mover, and leaver events, including expiry and revocation.
- One approval model that records who requested access, who approved it, and under what policy.
That approach aligns well with the audit lessons in Ultimate Guide to NHIs — Regulatory and Audit Perspectives and with the broader control emphasis in 52 NHI Breaches Analysis. Public-sector teams should also map the record to identity proofing, delegated authority, and periodic review so that entitlements can be defended under policy and law. When service accounts are issued separately from human identities, use the same approval and review evidence, but attach machine-specific fields such as purpose, system owner, credential TTL, and rotation interval. These controls tend to break down when legacy systems cannot support distinct ownership metadata because revocation becomes manual and ownership evidence fragments across ticketing tools.
Common Variations and Edge Cases
Tighter identity consolidation often increases migration and data-quality overhead, so organisations need to balance standardisation against legacy constraints. Some agencies will not be able to fully merge records on day one, especially where HR, IAM, and system inventories are split across ministries or shared service providers. In those cases, current guidance suggests using a common governance wrapper even if back-end systems remain separate.
That wrapper should still enforce consistent review cadence, documented sponsors, and revocation evidence. Contractor identities may need shorter expiry windows and more frequent access recertification than employees, while service accounts may need non-interactive controls such as credential rotation, owner attestation, and automated disablement when the workload is retired. The key exception is when a system cannot support lifecycle state at all; then the control focus shifts to compensating evidence, such as ticket records and periodic reconciliation. Best practice is evolving here, but the direction is clear: separate policy nuance from separate governance. For an overview of the identity model itself, see Ultimate Guide to NHIs — What are Non-Human Identities and the broader pattern in Top 10 NHI Issues.
In mixed environments, this guidance breaks down when identity ownership is split across agencies and no single system can reconcile approvals, expiry, and revocation consistently.
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 CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.OC | Governance and outcomes depend on a single accountable identity model. |
| NIST CSF 2.0 | PR.AA | Identity proofing and authorization must stay traceable across employees and contractors. |
| OWASP Non-Human Identity Top 10 | NHI-01 | Service accounts and keys need ownership, lifecycle, and revocation controls. |
Define one governance owner for all identity types and standardise lifecycle evidence across systems.
