Legacy system modernisation
Modernise the system nobody wants to touch. Without stopping the business. You get a staged path off the platform that is holding you back, delivered in increments that each stand on their own, so you are never one long project away from a working business.
The system nobody wants to touch.
The system runs the business and one person understands it. The vendor no longer supports the version you are on. It cannot be patched without breaking something, which means it cannot be patched. Or every new integration costs three times what it should because everything routes through the same fragile core.
Assessed honestly. Modernised in increments.
- 01Assess honestly. Some legacy systems should be replaced, some should be wrapped in an API and left alone, and some should simply be secured properly. We tell you which is which before you commit a budget.
- 02Reduce risk first. Where a system cannot be patched, we isolate it, monitor it, and control access to it, so the security exposure drops in week two rather than at the end of the programme.
- 03Capture the knowledge. Business rules buried in code and in one person's memory are documented before anything is rebuilt. This is the step most programmes skip and most failures trace back to.
- 04Modernise incrementally. Strangler-pattern replacement, function by function, with the old and new running side by side until the new one has earned the switch.
- 05Migrate data with evidence. Reconciliation at every stage, so finance can prove nothing was lost.
The exposure drops in week two, not at the end.
Where a system cannot be patched, we isolate it, monitor it, and control access to it — before the longer modernisation programme has even been scoped, let alone finished.
A plan, then proof it's working, one piece at a time.
- 01A modernisation assessment with options, costs, and risks stated plainly, including the option to do less than you expected.
- 02Immediate risk reduction on the existing system while the longer programme runs.
- 03Documented business rules and system behaviour, owned by you.
- 04Incremental delivery, each increment usable on its own.
How long it takes, by scope.
| Engagement | Duration | Outcome |
|---|---|---|
| Modernisation assessment | 3 – 4 weeks | Options, costs, and a recommended path |
| Risk reduction | 2 – 4 weeks | The unsupported system isolated, monitored, and controlled |
| Modernisation programme | 6 – 18 months | Delivered in increments, each independently valuable |
Straight answers, before you ask.
Do you always recommend replacing the legacy system?
No. Some legacy systems should be replaced, some should be wrapped in an API and left alone, and some should simply be secured properly. We tell you which is which before you commit a budget.
What happens if the system can't be patched?
We isolate it, monitor it, and control access to it, so the security exposure drops in week two of the programme rather than at the end.
How do you avoid losing the business knowledge locked in the old system?
Business rules buried in code and in one person's memory are documented before anything is rebuilt — the step most programmes skip, and most failures trace back to.
Will the business have to stop running during modernisation?
No. Modernisation happens incrementally — strangler-pattern replacement, function by function, with the old and new systems running side by side until the new one has earned the switch.
How do you make sure no data is lost during migration?
Data is migrated with reconciliation at every stage, so finance can prove nothing was lost.
Get an honest read on your legacy system.
Same named engineer, same plain-options approach described above — scoped to your system. No cost, no obligation.
Legacy system modernisation.
Request received.
A named engineer will reply within one business day to scope the NDA and the system in view.