Separation of duties and internal controls are not the same

At a glance

What this is: This article explains how separation of duties differs from broader internal controls, and why that distinction matters for access governance and compliance.

Why it matters: IAM, IGA, PAM, and audit teams need the distinction because SoD is one control inside a wider governance model, not a substitute for lifecycle, review, or monitoring discipline.

👉 Read Zluri's article on separation of duties and internal controls

Context

Separation of duties is a governance control that limits how much authority any one person has over a sensitive process. Internal controls are the broader mechanisms, rules, and procedures used to safeguard information, support accountability, and deter fraud. In identity programmes, that distinction matters because access design, approval flow, and audit evidence are not the same control.

For IAM and IGA teams, the practical issue is not whether SoD exists in policy, but whether it is enforced across lifecycle processes, approvals, and monitoring. If role design, recertification, and audit trails do not align, SoD becomes a paper rule rather than a control that actually constrains privilege.

Zluri frames the difference through finance and operations examples, but the underlying lesson is identity-wide: control intent must match the process being governed. That is typical of organisations that have policy language before control discipline.

Key questions

Q: How should organisations implement separation of duties in access governance?

A: Start by identifying the specific processes where one identity should never be able to initiate, approve, and finalise the same action. Then map those steps to different roles, verify the separation through access reviews, and collect audit evidence that proves independence in practice rather than only in policy.

Q: Why do internal controls need more than separation of duties?

A: SoD limits role concentration, but internal controls also need monitoring, reconciliation, training, and corrective action. Without those layers, organisations may block one risk path while still missing collusion, weak approvals, or undetected exceptions that undermine the whole governance model.

Q: What do teams get wrong about SoD in identity programmes?

A: They often treat it as a single permission rule instead of a control design problem. The common mistake is assuming different job titles guarantee independence, when the same person, role, or delegated access path can still control the process end to end.

Q: Who is accountable when SoD failures lead to compliance issues?

A: Accountability usually sits with the control owner, the process owner, and the identity governance team together, because SoD failures often reflect both design gaps and enforcement gaps. Regulators and auditors expect organisations to prove that controls are defined, operating, and independently evidenced.

Technical breakdown

What separation of duties actually controls

Separation of duties is a preventative control that splits critical steps across different people or functions so one actor cannot complete an entire sensitive transaction alone. In practice, it is used to reduce fraud, error, and misuse by breaking the chain between initiation, approval, execution, and reconciliation. The control is strongest where the process has a clear sequence and a meaningful second check. It weakens when roles are too broad, approvals are automatic, or the same account can exercise multiple permissions in one workflow. Practical implication: map each sensitive process to the identities that can initiate, approve, and validate it.

Practical implication: Map each sensitive process to the identities that can initiate, approve, and validate it.

How internal controls differ from SoD in identity governance

Internal controls are the wider operating system around governance. They include preventive, detective, and corrective measures such as policy enforcement, audit trails, monitoring, reconciliation, and training. SoD is one preventative element inside that system, not the system itself. That means a programme can have SoD written into policy yet still fail if access reviews are weak, logging is incomplete, or remedial actions are not enforced. In identity terms, SoD reduces concentration of privilege, while internal controls define how the organisation detects, explains, and corrects deviations. Practical implication: evaluate SoD as part of the control environment, not as a standalone compliance checkbox.

Practical implication: Evaluate SoD as part of the control environment, not as a standalone compliance checkbox.

Why approvals and audits are not enough on their own

Approvals and audits are important, but they do not automatically create effective separation of duties. An approval step can still be meaningless if the approver has no independence, if the same person can influence both request and review, or if the audit only records that a control existed rather than whether it constrained action. The article’s examples show that control design must resist role concentration and collusion, especially where financial, operational, or access decisions have lasting impact. Practical implication: test whether approval paths and audit evidence actually prevent the same identity from controlling the full process.

Practical implication: Test whether approval paths and audit evidence actually prevent the same identity from controlling the full process.

NHI Mgmt Group analysis

Separation of duties is a process control, not a governance strategy. The article correctly distinguishes SoD from internal controls, but the deeper point is that SoD only works when it is embedded in a wider control environment. Without access reviews, logging, reconciliation, and enforcement, SoD becomes a policy statement rather than an operational constraint. Practitioners should treat it as one control in a chain, not the chain itself.

The real failure mode is role concentration across sensitive steps. The article repeatedly shows that risk emerges when one identity can initiate, approve, and complete a task. That is a classic control failure in both finance and access governance because it removes independent challenge from the process. The implication is that role design must be tested against end-to-end workflow, not against job titles alone.

SoD is only as strong as the identities it governs. In identity programmes, the same control logic applies to human access, service accounts, and privileged workflows. If teams separate duties for people but ignore machine accounts or delegated admin paths, they leave a governance gap that attackers and insiders can exploit. Practitioners should extend SoD analysis across every identity type that can influence the same business process.

Identity blast radius: the article points to a broader governance reality that a single overly privileged identity can collapse multiple checks at once. That matters because access governance fails when process design assumes distinct actors where one account or role can actually act for several. Practitioners should audit where one identity still spans initiation, approval, and validation.

Compliance language without control verification creates false confidence. The article links SoD to SOX and other regulatory expectations, but the control only matters if organisations can show consistent enforcement. A named control on paper does not demonstrate independence in execution. Practitioners should make evidence of separation, not just policy wording, the standard for assurance.

From our research:

• 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, according to The State of Non-Human Identity Security.
• A separate finding in the same report says only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs.
• That visibility gap is why teams should pair SoD with NHI Lifecycle Management Guide discipline, especially where delegated access and third-party approvals overlap.

What this signals

Identity blast radius: the next governance step is to measure how far a single role can still reach across request, approval, and execution paths. When SoD is treated as a workflow property instead of a job-title policy, teams can see where privileged accounts quietly recreate end-to-end control. Pair that review with the Top 10 NHI Issues to pressure-test the same pattern across machine identities as well as human roles.

The practical signal for programme owners is whether audit evidence can prove independence without manual reconstruction. If access reviews, logs, and approval trails do not line up cleanly, the control may exist only in documentation. That is where the NIST Cybersecurity Framework 2.0 becomes useful: governance should produce verifiable control operation, not just stated intent.

For practitioners

• Define SoD at workflow level Break sensitive processes into discrete initiation, approval, execution, and reconciliation steps, then assign each step to different identities where the risk justifies it.
• Test for role concentration Review where one user, service account, or admin role can still influence multiple steps in the same process, especially in finance, procurement, and privileged access paths.
• Tie SoD to access reviews Use periodic access recertification to verify that role assignments still preserve independence and that inherited permissions have not recreated end-to-end control.
• Require evidence, not policy text Collect audit trails that show who initiated, who approved, and who reconciled each sensitive action so control independence can be demonstrated during audit or investigation.

Key takeaways

• Separation of duties is one control pattern inside a broader internal control environment, not a substitute for it.
• The risk appears when one identity can still initiate, approve, and complete the same sensitive process.
• Teams should verify SoD through access reviews and evidence, because written policy alone does not prove control independence.

Key terms

• Separation Of Duties: A control pattern that divides a sensitive process across multiple identities so no single person or account can complete the whole task alone. It reduces fraud, error, and misuse by forcing independent checks at key points in the workflow.
• Internal Controls: The broader set of mechanisms, rules, and procedures used to safeguard operations, support accountability, and detect or correct problems. In identity governance, they include approvals, monitoring, reconciliation, audits, and training, not just permission boundaries.
• Preventative Control: A control designed to stop an unwanted action before it happens. In SoD programmes, preventative controls split authority across roles so one identity cannot both perform and authorise the same sensitive step.
• Detective Control: A control that identifies problems after they occur or after a process has moved outside expected bounds. In identity governance, detective controls include logging, audit review, and reconciliation that reveal whether SoD is actually being enforced.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.

This post draws on content published by Zluri: Security & Compliance Separation Of Duties & Internal Controls: What’s The Difference? Read the original.