Capabilities
Every organisation has systems that everything depends on and nobody wants to touch. They are old, poorly understood, expensive to run and risky to change, so they get left alone, and the cost and risk quietly compound. Legacy modernisation is the work of dealing with them honestly rather than.
PEF Consulting Partners modernises legacy estates with the judgement of people who have run them, from SAP estates facing the 2027 maintenance deadline to platforms like Kraken. Read our analysis of the SAP IS U decision facing UK and Irish utilities.
An honest picture of your legacy estate: what each system does, what depends on it, what it costs to run, and what the real risk is of leaving it as it is. Most modernisation decisions are made without this, which is why so many stall.
The credible choices for each system, retain, re host, re platform, re build or replace, weighed on cost, risk and value rather than on enthusiasm for the newest technology. Sometimes the right answer is to leave a system exactly where it is, and we will say so.
A migration plan that manages risk rather than betting everything on a single cutover, with the data, integration and testing implications thought through before commitment.
The step almost everyone skips. A plan to actually retire the old system once the new one is live, so you stop paying to run both. Modernisation that never decommissions the legacy just adds cost.
Legacy programmes stall because the risk feels larger than the reward and nobody wants to be the one who broke the system everything relies on. We reduce that fear with evidence: a clear assessment, a staged approach, and honesty about what is genuinely risky versus what only feels risky. The organisations that modernise successfully are the ones that made the risk legible.
Cloud migration is moving applications, data and infrastructure from your own data centres or older hosting to a cloud platform such as Microsoft Azure, AWS or Google Cloud, by rehosting, replatforming or rebuilding them.
Not necessarily. Replacement is one option among several, and often not the best. Re hosting or re platforming can capture much of the benefit at a fraction of the risk. The right answer depends on the system and its role.
By making the ongoing cost and risk visible. A system that “still works” is often expensive to run, hard to change and a single point of failure. The assessment quantifies that so the business case is real rather than aspirational.
Digital transformation, target operating model, or get in touch.
Most legacy modernisation sits inside a wider IT transformation: an IT strategy that says which systems the business will run on in three years, an application rationalisation that retires the ones it will not, a cloud migration consultancy decision about what moves, what is rebuilt and what is simply switched off, and the integration layer that holds it together while the estate changes underneath it. We lead that work client side, with no reseller interest in the answer, and we sequence it so that each step pays for the next rather than waiting for a big bang that never arrives.
We bring senior people who have delivered exactly this at scale. Honest advice, and accountability for the outcome.