Legacy & Mainframe Modernization

De-risk your move to hybrid cloud. Leverage our data-driven 6R framework to protect critical system uptime while unlocking modern business agility.

DISCUSS YOUR HYBRID CLOUD ROADMAP

READ SUCCESS STORIES

Reduce Technical Debt

Identify and safely retire redundant code, legacy configurations, and underutilized "Zombie" workloads to instantly streamline your operating footprint.

Accelerate DevOps Agility

Introduce modern, automated CI/CD practices and Git-based workflows directly on z/OS to unify development across your entire enterprise.

Eliminate Data Silos

Enable seamless, low-latency integration between core legacy systems and cloud-native apps via secure, high-performance APIs.

What Is mainframe modernization?

Mainframe modernization is the strategic process of transforming legacy core systems into agile, hybrid architectures without disrupting critical business operations.

Rather than a high-risk “rip and replace” approach that threatens system stability, we evaluate every workload using a rigorous 6R framework (Retain, Rehost, Replatform, Refactor, Repurchase, Retire) to determine the lowest-risk, highest-value path forward.

Our tool-agnostic modernization framework

We leverage a tool-agnostic approach to ensure the target platform perfectly aligns with your unique scale and security requirements through a proven, three-step methodology.

Mainframe Discovery & Analysis

We utilize automated tooling and deep SMF/RMF data analysis to deliver an objective, "ground-truth" map of complex application and data dependencies. This comprehensive technical discovery is completed within a swift 5- to 6-week timeframe.

Modernize in Place

API-enabling legacy subsystems (CICS, IMS, Db2) to keep high-volume transactions executing on reliable, secure hardware while opening access to modern applications.

Intelligent Application Relocation

Selectively move targeted elements to Public Cloud or Linux on Z based on a strict "Business Criticality vs. Migration Complexity" matrix.

50%

Of typical mainframe budgets are consumed by software licensing, driving our focus on rapid cost containment.

80%

Of the world's largest banks trust CPT Global to optimize performance, capacity, and costs.

5-6 Weeks

Standard timeline to deliver an actionable application landscape map and locate quick-win modernization potential.

Solving the "big bang" migration crisis

Finding the right path for legacy systems requires balancing delivery speed, operational risk, and future scalability.

Trusted by 80% of the world's largest banks to manage capacity, performance, and testing, CPT Global eliminates the guesswork from high-stakes transformations.

DISCUSS YOUR HYBRID CLOUD ROADMAP

READ SUCCESS STORIES

Is it better to rehost or refactor mainframe applications?

The optimal choice depends entirely on your operational goals. Rehosting or replatforming is significantly faster and lowers initial risk for immediate savings. Refactoring to Java or cloud-native microservices unlocks maximum agility but demands rigorous, automated regression testing. Most clients select a hybrid approach, starting with Replatform/Rehost, then selectively refactoring high-value applications.

How do you manage the risk of data corruption during migration?

We mitigate transaction risk through automated data reconciliation and extended parallel testing. Your legacy and modernized environments run concurrently so processing outputs can be compared in real time, guaranteeing 100% data integrity before a formal production cutover.

What is the "Modernize in Place" approach?

This approach upgrades the existing mainframe environment itself to natively support Java, Python, RESTful APIs, and cloud DevOps tooling. This keeps your most critical, high-volume transactions on the world's most resilient platform while granting your development teams modern software delivery agility.

How does CPT Global identify which applications to move first?

We apply a proprietary, weighted scoring matrix evaluating "Business Value vs. Technical Complexity." High-demand, loosely coupled applications are prioritized as "Quick Wins" to build organizational momentum and deliver immediate ROI to justify further cloud investments.

How do we fund a major mainframe modernization initiative?

We utilize a unique "Optimization Funds Modernization" strategy. By executing a rapid 4- to 5-week initial analysis of your current processing workloads, we routinely uncover immediate "quick-win" infrastructure and licensing savings. These realized savings are then directly reinvested to fund your long-term cloud offloading and modernization roadmaps.