Information security roles and responsibilities

ISO/IEC 27017 Clause 6.1.1 requires you to define and allocate all information security responsibilities, and in cloud environments to clearly document which security tasks belong to the cloud service provider versus the cloud service customer. To operationalize it, publish an accountable role model (RACI), embed it into contracts and procedures, and prove it through approvals, training, and execution evidence.

Key takeaways:

• Document a shared responsibility model per cloud service and attach it to the contract and security operating procedures.
• Assign named accountable owners for each security control area, including third-party management, incident response, logging, access, and change.
• Retain auditable evidence: role charters, RACI, contractual allocations, onboarding/training, and operational records mapped to owners.

“Information security roles and responsibilities” sounds basic until you operate in cloud. The same control (logging, access reviews, vulnerability management) can be partially owned by a cloud service provider (CSP), partially owned by you, and partially performed by a managed service provider. ISO/IEC 27017 Clause 6.1.1 forces clarity: define every security responsibility, allocate it to a role, and explicitly document the split between cloud service provider and customer so nothing falls into the gaps ¹.

For a CCO, Compliance Officer, or GRC lead, the fastest path is to treat this as an accountability and contracting requirement, not a policy-writing exercise. Auditors will look for two things: (1) a complete, current responsibility map, and (2) proof it is used in operations (tickets, approvals, sign-offs, incident records, access attestations). If your cloud responsibilities live only in a slide deck, you will fail the “defined and allocated” test.

This page gives you requirement-level steps, the minimum evidence set to retain, common audit hangups, and a practical execution plan you can run with security, IT, and procurement.

Regulatory text

ISO/IEC 27017:2015 Clause 6.1.1 states: “All information security responsibilities shall be defined and allocated. In a cloud computing environment, the allocation of information security responsibilities between the cloud service provider and the cloud service customer shall be clearly defined and documented.” ¹

Operator meaning: you must (a) identify security responsibilities that exist in your environment, (b) assign each one to an accountable owner, and (c) where cloud is involved, document which party performs which tasks and who is accountable for outcomes. “Defined and allocated” must be specific enough that a new operator can execute the task without guessing.

Plain-English interpretation (what the requirement is really asking)

You need a living map of security work that answers, for every meaningful security activity:

1. What must be done (the responsibility).
2. Who is accountable (a named role inside your org, even if a third party performs the work).
3. Who performs it (internal team vs cloud service provider vs other third party).
4. How you know it happened (evidence/record).
5. Where it is documented (policy/standard/procedure, contract, runbook).

In cloud, the “shared responsibility model” cannot be implied. Your contract, security addendum, and operating procedures must reflect the split. If the CSP says “customer configures logging,” your internal responsibility model must name who configures logging, who reviews alerts, and how often it is checked.

Who it applies to

Entity types

• Cloud Service Providers (CSPs): you must define and allocate internal responsibilities and clearly document what you do versus what customers must do.
• Cloud Service Customers: you must define and allocate your internal responsibilities and clearly document what the CSP does versus what you must do.
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Operational contexts where this requirement becomes “make or break”

• Multi-cloud environments (different CSP defaults, different responsibility splits).
• Use of managed services (MSSP, MSP) where “outsourced” becomes “unclear.”
• Regulated workloads (PII, financial data, health data) where unclear ownership delays response.
• Rapidly changing product teams where cloud resources get created outside central IT.

What you actually need to do (step-by-step)

Step 1: Define your responsibility taxonomy (keep it practical)

Start with operational responsibility domains that match how work gets done. A workable baseline:

• Governance: policy ownership, risk acceptance, exceptions
• Asset and configuration management
• Identity and access management (IAM)
• Logging/monitoring and alert handling
• Vulnerability management and patching
• Change management and CI/CD security
• Incident response and forensics coordination
• Backup/restore and resilience testing
• Encryption and key management
• Data lifecycle: classification, retention, deletion
• Third-party risk management
• Security awareness and role-based training

Deliverable: Responsibility Domain List owned by security/GRC with IT input.

Step 2: Build a RACI that names “Accountable” roles (not teams)

Create a RACI matrix where each responsibility has:

• A (Accountable): one role, one throat to choke (CISO, Head of Cloud Ops, App Owner, etc.).
• R (Responsible): the performer(s), including third parties.
• C/I: stakeholders who must be consulted/informed.

Cloud-specific addition: add a “Party” column:

• CSP
• Customer (you)
• Shared
• Other third party (MSP/MSSP/SaaS integrator)

Deliverable: Information Security Responsibilities RACI + Shared Responsibility Allocation.

Step 3: Map each responsibility to control documentation and operating procedure

Auditors hate “RACI-only” programs. For each responsibility, link to:

• policy/standard section (what good looks like),
• procedure/runbook (how it is done),
• system of record (where evidence is generated: ticketing, SIEM, GRC tool).

Deliverable: Responsibilities-to-Procedures Crosswalk (table form is fine).

Step 4: Contractually document the cloud split

For each cloud service relationship (IaaS/PaaS/SaaS), ensure the allocation is captured in:

• Master agreement / MSA security exhibit (or DPA/security addendum),
• SLA language for availability/incident communications,
• right-to-audit / reporting commitments,
• responsibility boundaries for configuration, logging access, and incident cooperation.

If you are the customer, this step often lives with procurement and legal. Your job is to provide the responsibility matrix and insist the contract reflects it.

Deliverable: Executed contract artifacts showing the responsibility allocation is “clearly defined and documented” ¹.

Step 5: Operationalize with onboarding, training, and workflow gates

Make it real:

• Add “security responsibilities briefing” to onboarding for roles in the RACI.
• Add workflow gates: access requests route to the accountable role; risk exceptions route to the accountable approver; cloud account creation requires named owners.
• Tie responsibilities to on-call rotations and incident roles.

Deliverable: Role-based training records, workflow routing rules, approval logs.

Step 6: Test allocation through tabletop exercises and evidence sampling

Pick representative responsibilities and test end-to-end:

• “Who owns customer-managed encryption keys for workload X?”
• “Who approves logging exclusions?”
• “Who contacts the CSP during a suspected incident?”

Deliverable: Tabletop outputs and corrective actions.

Step 7: Keep it current through change triggers

Define triggers that force review:

• new cloud service adoption,
• major CSP feature changes you adopt,
• org restructure / role changes,
• material incidents.

Deliverable: Change-control checklist item: “Update responsibility allocation documentation.”

Required evidence and artifacts to retain (audit-ready list)

Maintain a single “Roles & Responsibilities” evidence folder with:

• Information Security Roles & Responsibilities policy/standard section (or standalone charter).
• RACI matrix with versioning, approval, and named accountable roles.
• Cloud shared responsibility allocation per cloud service (matrix or appendix).
• Contracts/security addenda reflecting responsibility split.
• Role descriptions or security responsibility statements for key roles (CISO, Cloud Owner, App Owner, IR Lead).
• Training records for role-based security responsibilities.
• Access approval/workflow evidence showing accountable routing.
• Incident response plan with named roles and CSP/customer coordination points.
• Evidence samples: tickets, change approvals, vulnerability exceptions, restore tests, monitoring review logs mapped to owners.

Common exam/audit questions and hangups

Expect these:

• “Show me where CSP responsibilities end and customer responsibilities begin for logging, patching, and incident response.”
• “Who is accountable for IAM in cloud platform X? Name the role and show an approval record.”
• “How do you ensure responsibilities remain current after reorgs or cloud migrations?”
• “Where is this documented, and how do operators find it during an incident?”
• “If a third party performs the task, who in your org is accountable for results?”

Audit hangup: teams list “Cloud Team” as accountable. Auditors typically want a role that carries accountability, even if multiple people can fill it.

Frequent implementation mistakes (and how to avoid them)

1. Mistake: treating the CSP shared responsibility model as sufficient documentation.
   Fix: create your own allocation document that maps the CSP model to your actual services, configurations, and internal roles ¹.

2. Mistake: documenting responsibilities but not wiring them into workflows.
   Fix: require accountable approvals in IAM, change management, exception handling, and incident comms. Evidence will appear naturally.

3. Mistake: missing “gray-zone” responsibilities (monitoring, alert triage, evidence retention).
   Fix: explicitly assign who reviews alerts, who tunes detections, and who retains logs, plus where the records live.

4. Mistake: outsourcing equals offloading accountability.
   Fix: keep “Accountable” internal; assign “Responsible” to the third party. Keep escalation paths documented.

5. Mistake: static RACI that never changes.
   Fix: add change triggers and an owner for the matrix with a defined review cadence that fits your change velocity.

Enforcement context and risk implications

No public enforcement cases were provided for this specific ISO/IEC 27017 clause in the supplied sources. Operationally, weak role allocation typically shows up as control failures during incidents and audits: delayed containment, missed patches, incomplete logging, and contractual gaps that block forensic access. The risk is less about the document and more about “unowned” security work in cloud where tasks are easy to assume someone else is doing.

Practical 30/60/90-day execution plan

First 30 days (get to a defensible baseline)

• Assign an executive owner (often CISO) and a GRC driver for the responsibility model.
• Publish a draft RACI for the responsibility domains that matter most to your audit scope and highest-risk workloads.
• Identify top cloud services and produce a first-pass shared responsibility allocation for each.
• Start contract gap review: locate security addenda and confirm they reflect the allocation.

By 60 days (make it operational)

• Finalize and approve the RACI and cloud allocation documents through your governance process.
• Update at least one core workflow to reflect accountability (access approvals, change approvals, risk exception approvals).
• Roll out role-based briefings for accountable roles and operators.
• Create the evidence map: for each responsibility, record the system-of-record and sample artifact type.

By 90 days (prove it works and close gaps)

• Run a tabletop that tests cloud/customer responsibility boundaries (incident scenario + logging/IAM scenario).
• Remediate gaps found: unclear owners, missing contract terms, missing evidence, broken workflows.
• Establish ongoing triggers for updates and assign an owner to maintain the responsibility documentation.
• If you manage many third parties, consider tracking responsibility allocations and contract evidence in Daydream so you can generate audit packets and show ownership, approvals, and third-party commitments without manual chasing.

Frequently Asked Questions

Do we need a separate RACI for every cloud provider and every SaaS tool?

You need documentation that clearly defines and allocates responsibilities for your cloud environment, especially the split between provider and customer ¹. In practice, keep one enterprise RACI and add per-service “responsibility appendices” for material cloud services.

If a managed service provider runs our cloud, can they be “Accountable” in the RACI?

Keep accountability inside your organization. Assign the managed service provider as “Responsible” for execution and document oversight responsibilities internally, including how you verify performance.

What is the minimum documentation auditors accept for “clearly defined and documented”?

A version-controlled responsibility allocation that names roles, shows CSP vs customer tasks, and is approved by appropriate owners, plus contracts or addenda that reflect the allocation ¹. Pair it with at least a small set of operational records mapped to those owners.

Who should own this requirement, security or compliance?

Security typically owns the content (roles, technical responsibilities). Compliance/GRC should own the governance mechanics: approvals, evidence mapping, audit response, and making sure third-party contracts reflect the allocation.

Our org changes often. How do we keep responsibilities current without constant rewrites?

Put the RACI under change control and tie updates to triggers such as reorgs, new cloud services, and major architecture changes. Keep roles generic (e.g., “Cloud Platform Owner”) and maintain a separate register of current role-holders.

How does this intersect with third-party risk management?

The cloud responsibility split is a third-party boundary decision documented in contracts and operating procedures. Treat responsibility allocations as a required artifact in due diligence and renewals so you can show what the third party does, what you do, and how you monitor it.

Footnotes

1. ISO/IEC 27017:2015 Information technology — Security techniques — Code of practice for information security controls based on ISO/IEC 27002 for cloud services