Architecture & control · reference function

Cloud Security & Assurance

Define security conditions and independently assess control effectiveness.

Reference mandate

Translate enterprise security and risk requirements into cloud control expectations, authoritative risk decisions and proportionate assurance.

Short

Define security conditions and independently assess control effectiveness.

Standard

Translate enterprise security and risk requirements into cloud control expectations, authoritative risk decisions and proportionate assurance.

Detailed

Translate enterprise security and risk requirements into cloud control expectations, authoritative risk decisions and proportionate assurance. The function maintains explicit decision boundaries, measurable outcomes, governed interfaces and a documented improvement loop for its scope.

Scope in

  • Security requirements
  • Risk assessment
  • Control assurance
  • Security exception authority

Scope out

  • Owning all technical implementation
  • Platform backlog management
  • Supplier-only risk acceptance

Responsibilities

  • Security requirements
  • Risk assessment
  • Control assurance
  • Security exception authority

Services

  • Security requirements service
  • Risk assessment service
  • Control assurance service
  • Security exception authority service

Required capabilities

  • Cloud Security Lead capability
  • Security Risk Owner capability
  • Control Assurance Lead capability

Roles

  • Cloud Security Lead
  • Security Risk Owner
  • Control Assurance Lead

Decision rights

  • Accept security risk
  • Approve security exception
  • Confirm assurance outcome

Key interfaces

  • Cloud Governance / CCoE
  • Cloud Architecture
  • Platform Engineering

Inputs

  • Requirements from Cloud Governance / CCoE
  • Requirements from Cloud Architecture

Outputs

  • Governed output to Cloud Architecture
  • Governed output to Platform Engineering

Governance forums

  • Assure design review
  • Cloud operating-model review

Measures

  • Control evidence coverage
  • Exception age
  • Risk-treatment closure

Dependencies

  • Cloud Governance / CCoE
  • Cloud Architecture
  • Platform Engineering

Sourcing options

  • Retained internal
  • Shared
  • MSP-supported

Organizational placements

  • Central cloud organization
  • Federated domain
  • Shared technology function

Decisions owned

  • Accept security risk
  • Approve security exception
  • Confirm assurance outcome

Decisions contributed to

  • Contribute to decisions owned by Cloud Governance / CCoE
  • Contribute to decisions owned by Cloud Architecture
  • Contribute to decisions owned by Platform Engineering
Design boundary

Common failure modes

  • Assurance and implementation are indistinguishable
  • Reviews lack triggers
  • Control evidence is manual and stale
Sourcing principle

Assessment support may be external; enterprise risk acceptance cannot be delegated to a supplier.

Minimum retained capability

Assessment support may be external; enterprise risk acceptance cannot be delegated to a supplier.

Maturity guidance

Begin with named ownership and one measurable outcome; add delegation and automation only when evidence and capability are reliable.

Reference note

Vendor-neutral practitioner reference pattern; validate against organizational, regulatory and sourcing context.

Version 2026.3 · reviewed 8 September 2026