How should security teams approach IGA modernisation when they are moving from on-premises systems to SaaS and hybrid infrastructure?

Security teams should start with governance, planning, and stakeholder alignment before implementation. Build the operating model around business processes, critical applications, and approval paths, then automate joiner mover leaver and access recertification workflows. Keep foundational design decisions stable early, use early demos to reduce rework, and avoid heavy customization that makes the programme harder to govern and scale.

Anchor IGA modernisation in the operating model before the tooling change

The move from on-premises IGA to SaaS or hybrid infrastructure fails most often when teams treat it as a platform migration instead of an operating-model redesign. The first decisions should define who owns access decisions, which business processes trigger them, and how approval paths work across cloud and on-premises systems. That is the point where governance becomes real, not just where provisioning gets faster.

Modernisation should start with the smallest set of applications and identities that prove the model works end to end. Build around joiner mover leaver handling, access recertification, and exception management first, because those are the workflows that reveal whether business ownership, entitlement data, and approvals are actually usable at scale.

For teams that are also trying to rationalise identity controls across modern infrastructure, NHIMG’s Ultimate Guide to NHIs is a useful companion because it frames lifecycle, visibility, and governance as operating questions rather than product features. The same applies to NHI Lifecycle Management Guide, which is helpful when lifecycle ownership and deprovisioning discipline need to be made explicit.

Design for workflow automation, not heavy customisation

In SaaS and hybrid environments, IGA value comes from standardised workflows, predictable data quality, and stable integration patterns. Heavy customisation usually creates brittle rules, makes upgrades harder, and leaves teams dependent on one-off fixes that are expensive to govern. Early demos should be used to validate the basic joiner mover leaver path, recertification cadence, and application onboarding approach before the programme hardens around the wrong design.

Foundational decisions should stay stable early because every later connector, role model, and approval exception inherits those choices. That means teams should be deliberate about where authoritative identity data lives, how entitlements are normalised across systems, and what level of process variance is acceptable between SaaS and on-premises applications. The goal is not perfect uniformity, but a control model that stays understandable when the estate grows.

When the programme needs a stronger lifecycle and governance reference point, Ultimate Guide to NHIs, Lifecycle Processes for Managing NHIs and Ultimate Guide to NHIs, Key Challenges and Risks both reinforce the practical lesson that lifecycle failure and over-complexity are usually governance problems first. For teams looking at broader identity governance patterns, Top 10 NHI Issues also highlights the operational consequences of poor visibility and excessive permissions.

Make governance measurable across SaaS and hybrid estates

Modernisation only works when the team can prove that access is being created, reviewed, and removed with the same discipline everywhere. In hybrid estates, the sharpest failure mode is inconsistent control coverage, where SaaS apps receive well-structured governance but legacy systems keep manual exception handling and stale entitlements. The programme should therefore track workflow completion, recertification completion, entitlement ownership, and deprovisioning timeliness across both environments.

This is also where security teams should decide what evidence they need for auditability, because SaaS makes provisioning easy but does not automatically make governance complete. If the organisation cannot show who approved access, when it was reviewed, and how quickly access was revoked after role change or departure, the programme is only partially modernised. The measure of success is not how many integrations are live, but how consistently the same governance standard applies across the estate.

Risk and Threat Considerations

IGA modernisation in SaaS and hybrid infrastructure creates risk when access workflows become fragmented across systems, especially if offboarding, recertification, or privileged approvals remain manual in any one environment. That inconsistency widens the window for stale access, excessive privilege, and audit failure, and it becomes more dangerous as the number of connected applications grows.

Failure mechanism: Teams automate the easy parts of provisioning while leaving ownership, exceptions, or revocation logic inconsistent across SaaS and on-premises platforms, so access outlives the business need that justified it.

Impact: The organisation accumulates latent access, weaker evidence for audits, and a larger blast radius when an account, approval path, or integration is misused or compromised.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

CIS Controls v8 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.

Framework	Control / Reference	Relevance
CIS Controls v8	6 — Access Control Management	IGA modernisation centers on provisioning, reviews, and removal of access across systems.
Recommendation — Define and enforce account lifecycle controls for provisioning, recertification, and timely deprovisioning.
NIST CSF 2.0	GV.OV — Oversight	The question is about governance, operating model, and stakeholder alignment for identity change.
	PR.AA — Identity Management, Authentication, and Access Control	IGA modernisation directly affects how identities and access are administered across hybrid estates.
	PR.PT — Protective Technology	Automation and integration are core to modern IGA implementation and scaling.
Recommendation — Establish governance oversight for identity workflows, ownership, and exception handling. Standardize identity and access control processes across SaaS and on-premises systems. Use protective technology to automate access workflows while keeping control boundaries stable.

Practitioner Guidance

What to prioritise: Start with the access events that create the most governance debt, usually joiner mover leaver, recertification, and privileged exceptions. If those workflows are not reliable, adding more applications only scales the problem.

What to verify: Confirm that each application has a named business owner, a stable approval path, and a clear source of truth for identity and entitlement data. If any of those are unclear, pause automation until the operating model is explicit.

Common mistake: Treating SaaS onboarding as a connector project. The connector is the easy part; the hard part is deciding how approvals, reviews, and revocation will work consistently across heterogeneous platforms.

Practitioner takeaway: The best modernisation programmes standardise governance first and automate second, because automation only improves control when the underlying ownership, lifecycle, and approval model is already coherent.