Enterprise Technology · UK

Mission-Critical ISV Exit: Seven Mainframe Specialists Mobilised in Five Days

A dominant mainframe vendor's licensing costs were set to quadruple with no capping mechanism. An immovable programme deadline with zero rollback capability meant the cutover had to succeed first time. MooodyCow mobilised seven mainframe specialists in five days, delivered two production cutovers ahead of schedule, and kept the ISV exit 100% on track to a hard commercial deadline.

At a glance

Client
Enterprise Technology Client
Sector
Enterprise Technology · Mainframe
Engagement
UK · Delivered to hard deadline

Services used

Flexforce

Flexforce

The delivery engine behind every successful programme. FlexForce embeds the precise expertise a programme needs — matched by skill, language and security clearance, governed to deliver, and mobilised within weeks. Capacity expands when demand peaks and contracts when it eases, without the weight of permanent headcount.

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Harmoniix™

Harmoniix™

MooodyCow's enterprise modernisation platform, replacing legacy migration approaches with one intelligent, automated system. Automated discovery, real-time synchronisation and built-in validation cut migration timelines by up to 80% with zero downtime, while an AI-ready data fabric leaves clean, governed data behind.

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Mainframe Services

Mainframe Services

Unlock the value of your mainframe estate while preparing for modern digital business. MooodyCow modernises, integrates, optimises and migrates mainframe environments, backed by deep IBM expertise and the Harmoniix platform to reduce risk and maintain business continuity.

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4x
Licensing cost uplift risk mitigated by successful ISV exit
7 specialists
Migration SMEs, automation engineers, systems programmers, PM and PMO mobilised
5 days
From brief to full team on site
100%
On track to hard commercial deadline u2014 zero disruption to live operations

Key Success Factors

  • Seven specialists on site in five days, sourced from a scarce market pool
  • No compromise on technical depth u2014 migration SMEs, automation engineers and systems programmers matched precisely to the stack
  • Two production cutovers delivered ahead of schedule under a zero-rollback constraint
  • Governance frameworks introduced to protect quality across interdependent legacy systems
  • Full team training and tooling handover ensuring operational continuity post-exit

The Challenge

A dominant mainframe vendor's licensing costs were set to quadruple, with no capping mechanism available and no extended support fallback. The programme deadline was immovable and carried real commercial penalty, with zero rollback capability — the cutover had to succeed first time. Critical specialist skills were scarce across the market, as the industry had largely migrated away from the relevant product stack. The client also faced decades of automation debt, knowledge gaps across teams, and multiple interdependent systems requiring simultaneous replacement.

The Solution

MooodyCow mobilised seven specialists within five days of the brief: migration SMEs, automation engineers, systems programmers, a Project Manager and PMO function. SMEs were embedded from day one. The environment was assessed, parallel tracking structured, and two production cutovers were delivered ahead of schedule.

Legacy automation rules and executables were converted at pace. Governance frameworks were introduced to protect delivery quality and maintainability. Replacement tooling was installed, configured and teams were trained end-to-end, keeping the ISV exit fully on track with zero disruption to live operations.

Outcome: The ISV exit was delivered on track to a hard commercial deadline with zero disruption to live operations. The 4x licensing cost uplift risk was fully mitigated. Two production cutovers were completed ahead of schedule, and the client's teams were equipped with the governance frameworks and trained on replacement tooling to maintain operations independently.

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