Cloud Migration, Integration & AI Operations

VMware & Mainframe Modernization

VMware estates and mainframes hold decades of business logic. The fastest path is to move them as they are, then modernize service by service.

Multicloud AI & ERP / Cloud Migration, Integration & AI Operations

VMware & Mainframe Modernization: diagram comparing AWS, Azure and Google Cloud
How a legacy estate is modernized, and how AWS, Azure and Google Cloud each implement it.

Why it matters

Licensing changes and data center exits are pushing VMware and mainframe workloads to the cloud. Re-architecting everything first takes years; a two-step approach delivers savings sooner with less risk.

How it works

A two-step path

Move as-is with the same VMware tools, using HCX to migrate VMs with little downtime. Stabilize with cloud backups, monitoring and networking. Then modernize service by service into containers and managed databases, and retire the old platform.

Mainframes

Mainframe applications can be refactored, replatformed or run side by side while results are compared. AI coding tools now accelerate understanding and converting legacy code.

AWS, Azure and Google Cloud compared

AWSAzureGoogle Cloud
VMware in the cloudAmazon Elastic VMware ServiceAzure VMware SolutionGoogle Cloud VMware Engine
VM migrationVMware HCXVMware HCXVMware HCX
DatastoresFSx for NetApp ONTAPAzure NetApp FilesNetApp Volumes
Mainframe modernizationAWS Mainframe Modernization, AWS TransformPartner solutions, Azure migration toolsDual Run, partner solutions
License benefitsBring your own licenses where allowedAzure Hybrid Benefit on AVSBring your own licenses where allowed

What makes each cloud different

AWS

AWS runs VMware Cloud Foundation inside your VPC with Amazon Elastic VMware Service, and AWS Transform uses AI agents to modernize VMware and mainframe workloads alongside AWS Mainframe Modernization.

Azure

Azure VMware Solution provides VMware private clouds on Azure with Azure NetApp Files datastores and Azure Hybrid Benefit for Windows and SQL Server.

Google Cloud

Google Cloud VMware Engine runs the VMware stack on Google Cloud, and Dual Run lets mainframe and cloud versions run side by side to prove results match before cutover.

Design decisions that matter

  1. 01Move first, change second

    Reduce risk and start saving sooner.

  2. 02Stabilize with cloud services

    Backup, monitoring, networking.

  3. 03Modernize by business value

    Not everything needs rewriting.

  4. 04Prove parity before cutover

    Especially for mainframes.

Common mistakes we see

  • Rewriting everything before moving. Years of delay and cost.
  • Staying on VMware forever. Missing the cloud's benefits.
  • Ignoring licensing. Unexpected costs after the move.

A practical 30-day plan

  1. Week 1

    Assess VMware and mainframe estates.

  2. Week 2

    Deploy the cloud VMware environment.

  3. Week 3

    Migrate a first wave with HCX.

  4. Week 4

    Pick the first services to modernize.

How NTS helps

NTS migrates VMware and mainframe workloads to AWS, Azure and Google Cloud, covering assessment, HCX migration, stabilization and AI-assisted modernization, with licensing and cost planning included.

What you get

  • Assessment of VMware and mainframe estates
  • Cloud VMware environment deployed
  • HCX migration waves with minimal downtime
  • A modernization roadmap service by service

Typical outcomes

  • Data center and VMware exits on schedule
  • Lower licensing and infrastructure costs
  • A clear path to modern applications

How we work with you

  1. 1Assess

    A focused review of your VMware and mainframe modernization across AWS, Azure and Google Cloud. We look for the gaps we find most often: rewriting everything before moving, staying on VMware forever and ignoring licensing.

  2. 2Design

    A target architecture and roadmap built on the decisions that matter most: move first, change second, stabilize with cloud services, modernize by business value and prove parity before cutover.

  3. 3Build

    Hands-on delivery alongside your team. We assess VMware and mainframe estates, deploy the cloud VMware environment, migrate a first wave with HCX, and finally pick the first services to modernize.

  4. 4Run and improve

    We stabilize migrated workloads and modernize them in priority order.

Why teams choose NTS for VMware and mainframe modernization

  • Move first, modernize next

    We deliver savings sooner with less risk.

  • Licensing aware

    We plan around VMware and software licensing changes.

  • Legacy experience

    We understand mainframes and VMware as well as the cloud.

Book a free 30-minute review

Talk to an NTS architect about your VMware and mainframe modernization on AWS, Azure and Google Cloud.