Overcoming legacy IT: How industry can help government modernise with confidence
Legacy IT remains one of the most persistent barriers to public sector transformation. Ageing infrastructure, fragmented data, specialist applications and a patchwork of supplier contracts can consume scarce budgets and staff capacity simply to keep essential services running. At the same time, government organisations are expected to strengthen cyber resilience, improve user experiences and adopt technologies such as AI, automation and edge computing. The challenge is not whether to modernise, but how to do so without disrupting the services on which people depend.
Start with outcomes, not replacement
Industry can help government shift the conversation from large-scale technology replacement to measurable service outcomes. Modernisation priorities should be shaped by the journeys that matter most: reliable access for frontline workers, faster digital services for citizens, secure collaboration across agencies and resilient operations at distributed sites. Mapping dependencies across applications, networks, contracts, data and skills then makes it possible to identify where change will deliver the greatest public value with the least operational risk.
This outcome-led approach supports phased modernisation rather than a disruptive “big bang”. Open APIs, standards-based integration and multivendor observability can improve visibility and governance while legacy and modern environments coexist. Reusable architecture patterns can then guide migration in controlled waves, aligned to service criticality, contractual milestones, funding and organisational readiness.
Use automation to release capacity
Modern platforms should also reduce the operational burden that legacy estates create. AI-native operations can correlate signals across users, applications, wired, wireless and WAN environments to identify probable causes faster and recommend or take trusted action within defined guardrails. By automating repetitive investigation, configuration checks and routine remediation, government IT teams can redirect specialist capacity towards service improvement, data readiness and responsible adoption of emerging technologies.
Build security and trust into the transition
Efficiency cannot come at the expense of security. As services, users and devices move across inherited and cloud environments, industry should help agencies embed Zero Trust principles into connectivity. Identity, role, device posture and context can inform least-privilege access, while segmentation limits lateral movement. Shared telemetry and policy across networking and security also improve auditability and enable consistent controls as services migrate.
Create a partnership for sustained change
Technology alone will not overcome legacy IT. Industry partners can make modernisation more practical by working alongside government teams to build a shared service blueprint, map technical and contractual dependencies, and prioritise migrations around public value and operational risk. Suppliers and systems integrators can establish joint test environments for legacy applications, create reusable reference designs for common site and service types, and run controlled pilots before wider deployment. They can also provide migration factories, embedded specialists and structured knowledge transfer so internal teams gain the skills to operate the new environment rather than becoming dependent on external support. Flexible commercial models, such as phased procurement, consumption-based services and contracts linked to service outcomes, can align investment with funding cycles and measurable benefits. Governance should bring service owners, security, technology, data, procurement and transformation leaders together with industry partners around shared measures, including service experience, resilience, incident resolution, compliance, manual work retired, skills gained and cost efficiency.
The most effective industry support helps government modernise at a pace it can govern and sustain. By combining open, phased architectures with AI-driven operations, integral security and outcome-based planning, agencies can reduce the drag of legacy systems while creating a foundation for innovation. The result is not simply newer IT, it is a more efficient, adaptable and trusted platform for public service.
