Public Sector/Legacy Application Modernisation
Government Legacy Application Modernisation
Assess, reengineer and migrate legacy and mainframe systems to modern, cloud-native architectures, in phases, without disrupting live services.
Modernise without breaking what works
Many public services still run on ageing, hard-to-change systems that are expensive to maintain, difficult to integrate and a growing risk. Ripping them out overnight is not an option when citizens depend on them daily.
Noseberry modernises government systems the low-risk way: assess, reengineer and migrate in phases, enabling APIs and cloud-native architecture while services keep running, and migrating legacy data safely.
A phased path off legacy technology
From discovery to a service in production
Discover
We map your service, users, data, systems and the outcomes you need to deliver for citizens.
Define
We agree scope, standards, accessibility, security and a phased roadmap.
Design
We design accessible journeys, workflows and the data model around real users.
Build
We build in phases so priority services go live and deliver value early.
Integrate
We connect identity, payments, departments and existing systems securely.
Support
We monitor, maintain and continuously improve the service after launch.
Built for public trust, delivered as one team
We bring product, design, engineering, AI, data and cloud together in one team, and build to the standards public services demand: accessible to everyone, secure and sovereign, transparent and accountable, and efficient with public funds. You own the platform, the code and the data, with no lock-in.
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Frequently Asked Questions
Yes. We modernise in phases with modular replacement and parallel running, so citizens keep being served throughout.
Yes. We assess, reengineer and migrate mainframe and legacy applications, including safe legacy data migration.
We put modern APIs in front of legacy systems so they can integrate with new services while you modernise underneath.
Where it fits, yes. We migrate to cloud-native architecture with DevSecOps, or a hybrid approach where data residency requires it.
We start with assessment, prioritise by value and risk, and replace in modules rather than one big-bang cutover.
Modernise legacy systems, safely
Tell us which systems are holding you back, and we will map a phased modernisation with no service disruption.