Partner Overview
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Legacy & Mainframe Partners

The system nobody wants to touch, connected to the ones they do.

Mainframe and legacy integration is often the reason a programme stalls. It is also work very few firms will take on. We will.

The premise
We do not run a Legacy & Mainframe practice. That is exactly why we are safe to bring in.

You own the client, the roadmap, and the platform work. We build the technical layer between Legacy & Mainframe and everything it has to agree with — and we have no interest in your platform business, your retainer, or your account.

Since 1997 we have engineered this connective work underneath other firms’ client relationships, across payments, travel, telecom, billing, financial services, healthcare, and manufacturing.

Where we plug in

The interfaces we work through, and why we choose one over another.

MQ & message-based integration

Reliable messaging to and from systems that predate REST by decades.

COBOL, copybooks & fixed-width data

Parsing and generating formats correctly, including the ones that are not documented.

CICS & transaction integration

Calling into transaction processing without destabilising it.

AS/400 & IBM i

Db2, data queues and programme calls where the platform is still the system of record.

The four requests we get most

Mainframe API
Exposing a mainframe system of record through a modern API.
Parallel running
Phased migration where legacy and new must run in parallel and reconcile.
File transfer replacement
Replacing file transfer with event-driven integration.
Knowledge recovery
Documenting and stabilising an integration whose author has retired.
However you need it delivered

Three ways partners use us on Legacy & Mainframe work.

A scoped work package
A defined integration with acceptance criteria, quoted fixed-scope. The usual way a partner tests whether we behave the way this page says we do.
Embedded in your team
Named engineers inside your tools, on your domain, in your stand-ups. The client sees your firm.
Architecture only
Senior architecture ownership up to ten days a month, where your team can build but wants the decisions defended.
Bring us the Legacy & Mainframe work you would rather not hire for.