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Home/Infrastructure Services/Server Operating Systems

Server Operating Systems

Our server estate runs on more operating systems than we can keep current.

For CIO, VP of infrastructure, IT operations and server teams

Talk to us about thisHow it works
First, you receiveAssessInventory and lifecycle findings · A recommendation · A fixed-scope proposal for the build
Timing and scopeStart with a fixed-fee assessment of the platforms in scope. Durations and methods are confirmed during scoping.
What happens nextA written recommendation. If you proceed, a scoped proposal for the next stage.

Most estates mix Windows Server with several Linux distributions, and a few systems are usually past end of support. We start with an inventory of every server's version and support status, review patching and hardening, and give you a plan for each end-of-life system. Then we upgrade or rebuild to standard baselines, and, if you want us to, keep everything patched and checked afterward.

How we work

What we do

Open a step to see what happens and what you receive.

Platforms we support
  • Windows Server 2016–2025
  • Red Hat Enterprise Linux
  • Ubuntu Server
  • Debian Linux
  • SUSE Linux Enterprise
  • Rocky Linux (Conditional)
  • AlmaLinux (Conditional)
  • Oracle Linux (Conditional)
  • Legacy and end-of-life systems (Conditional)

Conditional platforms are supported, subject to a scoping review of version, licensing and vendor support status, confirmed before we commit to the work.

Assess (fixed fee)
  • Inventory of versions and support status
  • Patch, hardening and lifecycle review

You receive: findings on the platforms in scope, a recommendation and a fixed-scope proposal.

Build (fixed scope)
  • In-place upgrades or rebuilds
  • Standard builds and configuration baselines

You receive: validated platforms, handed over with documentation and runbooks.

Support (optional, ongoing)
  • Patching and health checks
  • End-of-life planning

Each step stands on its own. Support is not required after a Build.

Typical projects
  • Windows Server upgrades ahead of end of support
  • Linux standardization onto a supported distribution
  • Hardening to a common configuration baseline
  • Isolation or retirement plans for legacy systems

Want to know what this would look like for you?About 30 minutes with a practitioner from the practice that does the work. You’ll leave with a clear view of your next step.

Book a 30-minute conversation

Outcomes

What you can expect

  • Every server on a supported, patched versionImplementation
  • Consistent builds across Windows and LinuxImplementation
  • A plan for every end-of-life systemAssessment

Each outcome is labelled with the stage that delivers it. An assessment or advisory engagement on its own does not include the implementation work.

Is this right for you?

Tick what sounds familiar

Select the needs that apply. We’ll collect them here so you can review the fit.

DeliverablesDeliverables by phase (4)

Assess

  • Inventory and lifecycle findings
  • A recommendation
  • A fixed-scope proposal for the build

Build

  • Documentation and runbooks at handover

Good to know

Questions leaders ask

Do you support our platform?

Standard platforms, yes. Conditional platforms, yes, subject to a scoping review of version, licensing and vendor support status that we confirm before we commit. If a platform is not listed, we will confirm whether we can take it on.

What do we get from the assessment?

Findings on the platforms in scope, a recommendation and a fixed-scope proposal for the build. It is fixed fee and stands on its own.

Can you supply the hardware?

Yes. Kalosys provides hardware, procurement and ongoing maintenance as part of its engagements where needed, confirmed in the proposal.

Is Support required after a Build?

No. Each step stands on its own.

Why it matters nowThe numbers behind this
85%of major outages caused by human error stem from staff not following procedures, or from flawed procedures (Source: Uptime Institute, Annual Outage Analysis 2025)

Not ready to talk yet?

Take this with you

Checklist · free

Infrastructure health checklist

A quick look at the capacity, support and lifecycle risks in your estate.

Get the checklist

Related offerings

Often paired with

Managed Infrastructure

“We can't watch our servers and network around the clock, and patching keeps slipping.”Every server, switch and firewall needs someone watching it, patching it and responding when it fails, at 2 a.m. Learn more

Datacenter Exit and VMware Migration to Azure

“We have to get out of the datacenter or off VMware, and we need to know what it will really take.”A datacenter lease, a hardware refresh or a VMware renewal is forcing a platform decision on a deadline, and most estates are less documented than people think. Learn more

Virtualization and Hypervisors

“We need to decide what our virtualization platform looks like next.”Licensing changes, hardware refreshes and hybrid plans are pushing many organizations to rethink their hypervisor. Learn more

Talk with our team

Talk to us about Server Operating Systems

Tell us the decision, deadline or problem in front of you.

  1. A reply from the practice that does the workThe practitioners who would deliver it.
  2. A short conversationWhat needs to happen, and by when.
  3. A written proposalWhat you would receive, how long it takes and the fee, before you commit.

No cost, no obligation.

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