Colleagues discussing application modernization progress in office

Mainframe application modernization

Choose the right modernization path to cut costs, reduce risk, and maximize business value

How can you unlock more value from your mainframe?

Mainframe systems support critical business processes, but rising costs, aging technology, and limited specialist skills can slow progress. T-Systems modernizes mainframes through emulation, replatforming, and cloud transformation. We help reduce risk, preserve business logic, improve efficiency, and maintain security, enabling innovation, scalability, and long-term business value.

Common scenarios – and how to master them

Your challenges

  • Rising mainframe costs and legacy complexity
  • Shortage of specialized mainframe skills
  • Emulation, replatforming, or full transformation options
  • Reduced risk and protected business continuity

Our approach

  • Application landscape assessment
  • Best-fit modernization strategy identified
  • Replatforming, refactoring, or cloud-native transformation
  • Preserved business logic with greater agility and efficiency

Business outcomes at a glance

Lower costs

Replatform

Reduce infrastructure costs with limited application changes

Reduce skill risks

Refactor

Move from scarce legacy skills toward modern development languages

Greater agility

Cloud-native

Enable automation, scalability and faster release cycles

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FAQ

Why should you modernize your mainframe applications?

Modernization helps reduce infrastructure costs, address the shortage of legacy skills, accelerate innovation, and prepare applications for future digital initiatives while preserving the business value built over decades.

Can you modernize without rewriting every application?

Yes. Many organizations benefit from incremental modernization. Applications can be re-platformed or refactored while preserving proven business logic, reducing risk and allowing modernization to progress at a pace that fits the business.

How do you minimize business disruption?

Every engagement begins with a structured assessment and feasibility study. We analyze application dependencies, define a suitable transformation roadmap and carefully manage implementation to maintain business continuity throughout the project.

Can your applications move to any cloud?

Yes. Depending on the selected modernization approach, applications can be prepared for public, private or hybrid cloud environments while meeting enterprise security and compliance requirements.

Which modernization approach is right for you?

The right approach depends on your business objectives, budget and risk profile. T-Systems offers three options: cost-efficient replatforming through emulation, application refactoring on the mainframe, or complete cloud-native transformation.

Why choose T-Systems for mainframe modernization?

T-Systems combines more than 30 years of mainframe expertise with over 5,000 cloud and DevOps specialists, delivering secure, enterprise-scale modernization programs from assessment through transformation and ongoing operations.

Ready for the next step?

Discover the best route from legacy mainframes to modern, scalable platforms.
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