Executive Summary
A central banking institution in the EU was moving market-sensitive services to the cloud while strengthening operational security and introducing AI-enabled workloads. Each service needed a clear risk assessment, documented control evidence, and senior sign-off before it could progress, within risk management structured on ISO 27001.
Epitechnic was engaged to give go-live decisions across approximately 50 market-sensitive services a consistent, evidenced basis. It built go-live risk gates and control assurance checkpoints into the bank's governance workflows, independently challenged the assurance evidence of some 20 to 30 suppliers, and brought control gaps, remediation actions, and residual risk decisions to the business, architecture, audit, and risk stakeholders who owned them.
The result was a clearer evidence base for go-live decisions, closed audit actions, stronger supplier and control assurance, and a more defensible basis for senior risk acceptance across critical services.
Business Challenge
The bank's cloud migration, operational security work, and new AI-enabled workloads were progressing in parallel, and each produced its own security decisions. Risk was assessed in different ways from one service to the next, so senior stakeholders could not easily compare the residual risk they were being asked to accept. Several audit findings on control evidence remained open.
Supplier assurance added to the pressure. Services depended on major cloud providers, including AWS, Azure, and Oracle Cloud, alongside smaller software vendors and managed service providers. Their assurance evidence was largely accepted as supplied, and gaps between what a supplier asserted and how a service was actually designed and configured were not consistently tested. For services handling market-sensitive information, senior sign-off needed evidence strong enough to support it.
Success Criteria
- One consistent risk assessment and sign-off route for every market-sensitive service
- Go-live decisions supported by documented control evidence
- Supplier assurance evidence tested against each service's actual design and configuration
- Residual risk stated plainly for the stakeholders accountable for accepting it
- Open audit actions closed
- AI-enabled workloads assessed through the same governance route as every other service
Epitechnic Approach
The engagement was defined by its outcome: every market-sensitive service reaching go-live with a documented risk assessment, tested control evidence, and a residual risk decision signed off by an accountable owner. The work sat inside the bank's existing ISO 27001-based risk management, so the new checkpoints strengthened the governance the bank already ran.
Each service was treated as a decision to be made on evidence, covering what the service does, which information it handles, which suppliers it depends on, which controls are in place, and what residual risk remains for an accountable owner to accept.
Solution
Go-live risk gates
Services reached go-live through different routes, with risk assessed differently each time. Epitechnic established go-live risk gates within the bank's governance workflows, with control assurance checkpoints at each stage. A service progressed when its risk assessment, control evidence, and residual risk decision were complete and signed off at the right level.
Across approximately 50 market-sensitive services, go-live decisions followed one route and rested on the same standard of evidence.
Independent challenge of supplier assurance
Assurance evidence from cloud providers, software vendors, and managed service providers was reviewed independently against each service's actual design and configuration. Where the evidence did not cover how a service was built or operated, the gap was recorded with a remediation action and a named owner.
Decisions about supplier risk were then made with the gaps visible, and supplier assurance became a test of evidence for every service that depended on a third party.
Control gaps, remediation, and residual risk
Control gaps, remediation actions, and residual risk decisions were presented to business, architecture, audit, and risk stakeholders in terms each could act on. Residual risk was stated plainly for the senior stakeholder accountable for accepting it, with the evidence behind it recorded.
Open audit actions were closed, and risk acceptance decisions were documented in a form that audit and the bank's governance bodies could review.
AI-enabled workloads
Some services included AI capabilities built through the bank's internal AI platform, with AI modules or interfaces within the service. These workloads passed through the same go-live risk gates, so their risks, including access to data and the handling of market-sensitive information, were assessed and evidenced before go-live.
Outcomes
Go-live decisions: Approximately 50 market-sensitive services assessed through one set of go-live risk gates, each with documented control evidence and a signed-off residual risk position.
Audit: Open audit actions on control evidence closed.
Supplier assurance: Assurance evidence from some 20 to 30 suppliers, including major cloud providers, independently challenged against each service's design.
Risk acceptance: Senior stakeholders gained a more defensible basis for accepting residual risk across critical services.
AI governance: AI-enabled workloads assessed through the same governance route as every other service.
Why It Worked
Governance was built into the workflow that services already followed to reach production, so evidence was gathered at the point each decision was made. Independent challenge of supplier evidence, combined with residual risk stated plainly for the accountable owner, gave senior stakeholders a basis for sign-off they could explain to audit and to the bank's governance bodies.
Key Takeaways
Challenge: Cloud migration, operational security, and AI-enabled workloads across market-sensitive services, with inconsistent risk assessment, open audit findings, and supplier evidence largely accepted as supplied.
Approach: Go-live risk gates and control assurance checkpoints built into existing ISO 27001-based workflows, with supplier evidence independently challenged and residual risk stated plainly for its owners.
Outcomes: Defensible go-live decisions across approximately 50 market-sensitive services, closed audit actions, and stronger supplier and control assurance.
Lessons: Go-live decisions become defensible when supplier and control evidence is tested against each service's actual design before senior sign-off.