Trainee PLC jobs in the UK usually ask for an electrical, mechanical or maintenance background, a practical attitude and real interest in controls. They rarely demand prior PLC experience, but the better-paid junior roles expect you to arrive with some. On 21 October 2026, Reed's trainee PLC search returned roughly 130 results, with advertised salaries from £25,000 to £50,000.
What do trainee PLC job adverts actually say?
They say "training provided", and they mean it, but the training sits on top of a background they expect you to have. We read a sample of live adverts on Reed on 21 October 2026. The search is broad, so it also returns unrelated roles; about half of the first 25 results were genuine PLC or controls trainee posts. The table summarises representative ones.
| Advert title | Advertised salary | What it asks for, in summary |
|---|---|---|
| Graduate Control Systems Engineer (training on PLC programming) | £25,000–£27,000 | A graduate wanting to become a controls engineer, learning Structured Text and Ladder Logic; a UK driving licence |
| Graduate / Junior Engineer (training into automation and PLCs) | £27,000–£30,000 | An electrical, mechanical or manufacturing background; structured training and further qualifications offered |
| Junior Electrical Service Engineer (training on PLCs) | £30,000–£35,000 | An electrical service or maintenance background, or a panel wirer; field-based work and a driving licence |
| Junior Controls / PLC Engineer | £30,000–£40,000 | A qualification in electrical or maintenance engineering and an interest in PLCs; experience described as an advantage, not essential |
| Maintenance Engineer (electrical / PLC training) | £40,000–£45,000 | An electrical maintenance background; PLC fault-finding with further PLC training given |
| Junior Automation Engineer (PLC / HMI / SCADA) | £40,000–£50,000 | Exposure to PLC, HMI and SCADA from day one, working in Allen-Bradley and/or Siemens |
The pattern is clear. The lowest-paid posts take graduates with little hands-on experience. The best-paid "junior" posts want evidence you can already contribute.
What background do employers expect you to have?
Most want one of three things: an electrical or maintenance engineering background, a relevant degree, or hands-on exposure to control systems. The Birmingham Junior Controls / PLC Engineer advert asks for an electrical or maintenance engineering qualification and says PLC experience would help but is not required. The Cambridgeshire graduate post accepts electrical, mechanical or manufacturing backgrounds. One maintenance post, in Dalkeith, targets electrical maintenance engineers who work on 3-phase motors and drives and want PLC training.
That is encouraging if you are changing career. If you already work as an electrician or maintenance technician, you are closer than you think. Our guide on moving from electrician to PLC engineer covers the transition in detail.
Which PLC platforms and skills do trainee adverts name?
Titles and summaries name Siemens TIA Portal, Allen-Bradley and sometimes DCS systems, plus HMI and SCADA alongside PLC programming. In the first 25 results for "PLC programmer" the same day, a handful of titles named Siemens TIA Portal and a similar number named Allen-Bradley or Rockwell, while most named no vendor at all.
So the safest plan is to learn the logic and workflow thoroughly on one platform, then be ready to explain how it transfers. Siemens is a sensible first choice for UK work, and our comparison of Siemens vs Allen-Bradley PLCs helps you weigh it up. Skills that appear repeatedly in the adverts:
- Reading and writing ladder logic, and for graduate posts, Structured Text.
- Fault-finding on machinery, drives, sensors and I/O.
- HMI and SCADA basics, since many "PLC" roles include screens and alarms.
- Electrical competence: panels, wiring, 3-phase equipment, safe isolation.
- Commissioning and documentation, with some travel to customer sites.
- A driving licence, which appeared in several field-based adverts.
How does the trainee route compare with an apprenticeship?
An apprenticeship is the formal employer-led route, while trainee adverts are looser arrangements where the employer trains you on the job. The relevant standard is the Level 4 Automation and Controls Engineering Technician (ST0662). According to Skills England, technicians in this role set up, maintain, troubleshoot and improve automation hardware and software, including PLCs, HMIs, robots and industrial networks, with a typical duration of 48 months not including the end-point assessment and a maximum funding band of £14,000. Skills England notes that the page we read is the retired version 1.0, with version 1.1 as the latest approved version, so check the current standard before relying on those details.
The trade-off is time against structure. An apprenticeship gives a long, structured route with a qualification, but you need an employer to take you on. A short course gives you speed and a head start for trainee adverts, but no employer commitment. Our comparison of apprenticeships, short courses and degrees sets out the options side by side.
What do trainee PLC jobs pay in the UK?
On Reed's adverts the range ran from £25,000 to £50,000, and the number you will see depends on how much you can already do. Graduate and junior engineer adverts sat at £25,000 to £30,000. Posts for people with electrical service or maintenance experience clustered at £30,000 to £45,000. Junior automation engineer roles asking for PLC, HMI and SCADA exposure reached £40,000 to £50,000.
For comparison, ITJobsWatch showed a median of £60,000 for permanent PLC Engineer roles in the six months to 21 October 2026, so trainee pay is a step towards that figure, not the figure itself. Several adverts list overtime, bonuses or a company van on top of base salary. Our PLC engineer salary guide explains how pay develops.
What does a trainee PLC engineer actually do day to day?
The duties in the adverts are practical and varied, and they are less about writing perfect code than about keeping machines running. Across the adverts we read, the recurring tasks were:
- Supporting PLC, HMI and SCADA control systems for existing machinery.
- Fault-finding and breakdown investigation, including on older equipment.
- Assisting with control system design, software changes and commissioning.
- Building, modifying and rewiring electrical control panels.
- Calibrating, testing and servicing instrumentation that measures pressure, temperature and flow, in one field-based service role.
- Testing and fixing bugs in existing PLC code under a senior controls engineer, in a graduate role.
If the first months of the job are about fault-finding and supporting existing systems, your preparation should be too. Read a PLC troubleshooting guide and practise reading a program online, not only writing one from scratch.
How can you stand out without PLC experience?
Show a small, finished project you can explain. A portfolio built from free simulators is credible because you can describe the logic, the tests and the faults you fixed. A sensible set of projects:
- A motor start-stop with overload and emergency stop, written in ladder logic.
- A traffic light or conveyor sequence using timers and counters.
- A tank-level control with high and low alarms.
- A short write-up for each: the I/O list, the logic, how you tested it and what went wrong first time.
You can build and test the first three in the free browser tools at lab.edwartens.com, including the PLC simulator and the ladder logic simulator, with nothing to install. If you want Siemens-specific practice, the free Siemens TIA Portal course is a gentle start. Pair that with our ladder logic tutorial and the first PLC job guide.
Whatever you build, document it the way an engineer would hand it over: labelled I/O, a clear logic description and notes on how you tested it.
What will interviews for trainee PLC roles cover?
Expect practical questions about your background, safety and how you think through a fault. Preparing short answers to these covers most of what is likely to come up:
- Tell me about a machine or circuit you have worked on. Choose one and explain what it did and what went wrong.
- How would you approach a machine that has stopped? Describe a method: safety first, then inputs, outputs, power, then the program.
- What is the difference between an input and an output, and what is a normally closed contact? These basics come up often.
- Walk me through a project you built. Your simulator portfolio answers this.
- Why PLC and controls work? Be specific about what attracts you.
Our 50 PLC interview questions and answers gives model answers to practise against.
How should you apply for trainee PLC roles?
Tailor each application to the advert's own words and show the background it asks for. Lead with the electrical, mechanical or maintenance experience, then your portfolio, then training. Mention safety awareness, because adverts for service and maintenance roles stress it. Be honest about simulator-based practice, and say what you would do next on real hardware.
Do not apply only to roles titled "trainee". Several of the most useful adverts say "Junior", "Graduate" or "Maintenance Engineer (PLC training)", and the same role can appear under more than one title. Read the full advert, not just the headline.
How EDWartens can help
The Professional Module is a five-day live online Siemens TIA Portal class covering S7 PLC hardware, ladder logic, HMI and WinCC SCADA, plus 68 self-paced Basic Engineering modules and a one-to-one resume session. It is £2,140 + VAT = £2,568, with a £100 deposit to reserve a seat. There is no job guarantee, and it is not a regulated qualification. Sign up to see the next Monday cohort, or begin with the free labs. For the wider picture, see the UK PLC job market data.
