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XSIS
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Cloud & Infrastructure

Cloud Strategy and Migration

Move workloads to the cloud in stages, with a tested route back at every step.

Why It Matters

Cloud plans stall when the estate is tied to one provider and nobody can say what depends on what. A move without a destination, an owner and a route back becomes a rewrite.

The risks that sink a migration are known. Data can fall out of step at cutover, an application can run slower after the move, and the bill can arrive above the plan.

What We Do

  • A written target for each workload, with the accounts, networks and guardrails that target needs.

  • Workloads move one at a time, data copied first, each with an acceptance test and a route back.

  • More than one provider where it earns its place, on one set of standards for identity, logging and deployment.

  • A list of the services that tie you to a provider, the effort to leave and the order of the work.

What Changes for You

  1. Every system has a written destination, chosen for its data, latency and cost, that you can show to an auditor.

  2. Each workload moves on its own with a rehearsal, an acceptance test and a route back, so your teams keep working.

  3. You know which provider services tie you in and what leaving would take, so portability is planned rather than discovered late.

How the Work Runs

Work moves in stages, and each stage ends with a decision you can see. Nothing changes until the acceptance test and the route back are agreed.

  1. Assess the Estate

    We inventory workloads, data, contracts and the links between systems, and you receive a dependency map that names every owner and interface. You give us the inventories and time with the people who run each system, and you approve the map before design starts.

  2. Design the Target

    We agree where each workload belongs and how it will move. A workload can move as it is when the platform fits. It can be adapted to the new platform when a managed service removes work, or rebuilt when its design blocks the target. You approve the target architecture and the migration wave plan before anything is built.

  3. Prepare the Platform

    We build the landing zone: accounts, networks, identity, guardrails and cost controls, all defined as code and reviewed like software. Your team reviews the first environment, and you decide the access rules before any workload arrives.

  4. Move in Stages

    Each wave copies and reconciles the data, rehearses the switch and checks the result against a runbook. You name the owner who signs off each wave. The wave closes only when each workload passes its acceptance test and its monthly cost matches the plan. Its route back must also have been rehearsed in the new environment.

  5. Hand Over

    You receive the target architecture, the dependency map, the runbooks and the recovery procedures in your own repositories. Your team decides whether it runs the estate or we do, and we stay for the first changes either way.

Platforms and Technologies

Amazon Web Services (AWS), Microsoft Azure, Google Cloud and Alibaba Cloud are the public clouds we work in. Kubernetes runs containers as one portable estate. Terraform, OpenTofu and Pulumi describe servers and networks as files your team can review. Docker packages each service so it runs the same way everywhere.

Questions

What buyers ask before they approve a migration.

Will the migration interrupt our business?

We plan each move to avoid an interruption. Where a system cannot run in two places, we agree a maintenance window and rehearse the switch. The route back stays open until the acceptance test passes.

Which cloud provider should we use?

Usually the one you already use, unless there is a clear reason to change. We compare contracts, skills, latency, data rules and the services each provider offers before we recommend.

How do you avoid lock-in?

Infrastructure is defined in open tools and workloads run on portable platforms. Where a provider service is the better choice, we use it on purpose and write down the route out, with the effort it would take.

What does a migration cover?

We can move one application, a data centre or the whole estate. The scope names every system, its owner, its acceptance test and the order of the moves. Day-to-day operation stays with your team or our managed cloud service.

What drives the cost of a migration?

The number of systems, their dependencies and the state of their documentation. Your hardware, licences and cloud usage are separate, and we list them before you commit. The monthly cost of each workload is compared with the plan after it moves.

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