Sysadmin
Often searched as systems administrator or IT systems engineer.
Own the boxes. Patching, backups, AD/Linux, the occasional 2am alert.
Most UK job adverts call this role "Systems Administrator". Practitioners shorten it to Sysadmin in conversation, on CVs, and in team names. POST uses Sysadmin because it describes the work more precisely than the recruiter label, and because "IT Systems Engineer" and "Infrastructure Engineer (junior)" increasingly mean platform or IaC work, which is a different seat.
Massively underrated foundation. The Linux and AD fluency you build here compounds for a decade, into cloud, into security, into anything.
- Domain
- Foundations
- Entry
- £24–36k
- Senior
- £55–78k
- You like owning a problem end-to-end, from the kernel up
- You're patient with systems that don't fail cleanly
- You're moving up from helpdesk and want a wider remit, not a deeper queue
- You'll happily be on-call once or twice a month for grown-up money
- You want to write software for a living, this isn't that
- You can't bear documentation, half the job is leaving the next person something to read
- You see cloud as a clean break from servers, it isn't, you'll meet them all again
What "doing well" looks like in the seat
- Your runbooks are the ones people copy
- You've automated something that used to take a colleague an afternoon
- You can rebuild a server you've never seen before from its docs and a backup
- Junior engineers come to you before they raise the ticket
The slow salary curve. Sysadmin pay in the UK plateaus in a way cloud and platform don't, and most people don't notice until year four when their old colleagues who switched to AWS are earning twelve grand more for the same kind of work. The skills are the most transferable in the industry, but only if you actually transfer them. Stay too long and you're a senior sysadmin in a market that increasingly hires platform engineers instead.
Tradeoffs at a glance
Hover any chip for the calibrated meaning. Ratings are directional, not absolute.
Promotion ceiling
Senior sysadmin / infra lead; pivot to cloud or platform to grow further.
Who actually gets in
- +IT support
- +NOC
- +Military signals
Common misconceptions
- −That it's being replaced by cloud, most orgs still run hybrid.
Where this leads
- Cloud Engineer
- SRE
- Detection Engineer
Certifications people pair with this
Listed because the graph connects them to this role, not because you need all of them. Most practitioners pick one or two.
Pathways that pass through here
- IT Support → Sysadmin (the honest on-ramp)
The realistic first paid technology job. No shortcuts, but the cleanest gateway into every other world.
- Platform / DevOps Engineer → SRE
Build the systems other engineers depend on. Requires coding fluency. Rarely entry-level.
- Network Engineer
Underrated, stable, foundational to almost every other track.
What this is based on
Practitioner judgement. External evidence review pending.
Last reviewed: not yet reviewed · UK market
Where this fits
Roles connect to pathways, certs and other roles. Use one to test the next.
- IT Support → Sysadmin (the honest on-ramp)
The realistic first paid technology job. No shortcuts, but the cleanest gateway into every other world.
- Defensive / SOC → Detection Engineer
The realistic on-ramp into security. Defensive, structured, hireable. Biased toward SOC-stack certs. NOT CISSP.
- Enterprise IT. Windows / AD / M365
The Microsoft-shop spine. A durable, hireable lane and a direct on-ramp to security, cloud and IAM.
- AI will not delete IT, but it will shrink one kind of IT role
The 'AI replaces all of IT' narrative is wrong. The narrower version is mostly right, and worth planning around.
- Why most people fail trying to leave helpdesk
It's almost never a skills problem. It's a positioning problem, a portfolio problem, and a willingness-to-be-uncomfortable problem, in that order.
- Why Security+ is simultaneously overrated and useful
It will not get you a security job. It will get you past an HR filter. Those are different problems.
The next step
You've read about the role. The harder question is whether it's the right one for you.
A Career Verdict is the written, practitioner-authored call on your specific route into and out of this role. Six primitives, same format every time.
A route shows what is possible. A Career Verdict makes the call.
Career Verdict
Helpdesk → Security Architect
- 01The callA clear judgement on whether your route is realistic, and under what conditions.
- 02Where the route breaksThe most likely point to stall, and why it happens in practice.
- 03What to do nextSpecific priorities for the next 6–24 months, and what to drop.
Career Verdict
- The callA single written judgement on whether the route is realistic for you.
- Plateaus and failure modesThe flat years and the specific ways this route tends to stall.
- Where you standThe strongest and weakest parts of your current position, named.
- Salary realityWhat this route actually pays, set against what you've been told it pays.
Usually within minutes of payment. Kept 24 months, then deleted. Deletion on request at any time.
Built on POST's practitioner-authored assessment framework, informed by two decades across helpdesk, infrastructure and security. The verdict applies that framework to your inputs.