How Ensono Handles Complex Mainframe Transitions

Hundreds of Migrations. Millions of MIPS. One Proven Approach.

Switching mainframe providers is a high-stakes decision. The risk of disruption, data loss, or downtime can feel overwhelming—especially if your current provider is slow to cooperate. That’s why Ensono has developed a repeatable, low-risk migration methodology to help you move forward with confidence.

With over 158 successful migrations and 1.6 million MIPS under management, we’ve helped businesses of all sizes transition off legacy providers and into more agile, cost-effective environments. This guide walks you through how we manage complexity, mitigate risk, and deliver results—without surprises.

What You’ll Learn in the Guide

• How Ensono’s step-by-step process ensures continuity at every stage
• What “real” knowledge transfer looks like—including how we work with non-cooperative incumbent providers
• What to ask for in your current contract or SoW before migrating
• Why our clients trust us with millions of batch jobs and high-availability workloads
• Ways to reduce the cost, risk, and time of your mainframe transition

A Transition Plan Built on Experience

We’ve fine-tuned our transition approach over hundreds of client engagements. From hardware replication and functional testing to mock cutovers and final migration, you’ll understand what to expect—and what questions to ask—at every step.

Our methodology includes:

• Discovery, shadowing, and reverse shadowing
• Equipment and network buildout
• Ticket automation and runbook acceptance
• Mock migration, go-live planning, and post-go-live support

We also provide support navigating common contract limitations, acquiring necessary IDs, and verifying the scope of your incumbent provider’s responsibilities during an out-migration.

A Track Record You Can Trust

• 158+ mainframe migrations completed
• 1.6M+ MIPS under management
• 1350+ batch jobs per month handled
• 135+ dedicated mainframe experts

Whether you’re in insurance, healthcare, financial services, manufacturing, or public sector—we’ve seen it before and we’ll help you move with confidence.

Ready to Get Started?

This guide is your inside look at how Ensono transitions clients from their legacy mainframe provider with precision, accountability, and speed. Whether you’re just exploring or actively preparing to make a move, this resource will help you plan your migration strategy with eyes wide open.