Application Estate Modernisation & Data Centre Exit for a Global Investment Manager

Simplex Services delivered a controlled, methodical migration programme designed to ensure predictable outcomes at scale.

• Comprehensive Application Discovery & Assessment
  • A full discovery exercise was conducted across ~200 applications to understand:
    • Technology stacks (VB, Java, Oracle, WebLogic, COTS, ARO)
    • Infrastructure dependencies
    • Upgrade requirements
    • Cloud readiness and migration pathways
  • This created a clear baseline for planning and sequencing.
• Defined Migration Strategy & Framework
  • A structured, repeatable migration approach was developed, including:
    • Categorisation of applications by complexity and migration type
    • Standardised patterns for re‑hosting, upgrading, or modernising
    • Wave planning aligned to business priorities
  • This ensured consistency and reduced delivery risk.
• Cloud Environment Setup & Readiness
  • The target Azure environment was established with:
    • Governance and security baselines
    • Landing zones for application deployment
    • Connectivity, identity, and operational controls
  • This provided a stable foundation for migration waves.
• Application Migration & Business Testing
  • Migration waves were executed in a controlled manner:
    • Applications were migrated to Azure using defined patterns
    • Upgrades were applied to ensure latest supported versions
    • Business testing validated functionality and performance
    • Cutover activities ensured continuity of service
  • This safeguarded business operations throughout the programme.
• Service Transition & Stabilisation
  • Each application underwent structured service transition:
    • Operational readiness checks
    • Knowledge transfer and documentation
    • Monitoring and support handover
  • This ensured applications were fully supported in the new cloud environment.