Operations Technology Engineer

An operations technology engineer looks after the computers, controllers and networks that run physical operations - things like production lines, water treatment plants, rail signalling, energy grids, warehouses and building systems. The work sits between traditional IT (laptops, servers, business software) and the engineering side of a site, keeping control systems running reliably, safely and securely. You typically work for an industrial or infrastructure operator, or for an engineering consultancy, system integrator or vendor that supports them.

Starting salary: £28k–£36k
Live graduate jobs: Search all jobs
Main way in: Graduate schemes at large industrial and infrastructure…
They usually ask for: A degree in electrical, electronic, control, mechatronic…

Approximate graduate salary

Typically around £28,000–£36,000 to start, with the upper end more common on structured graduate schemes at large utilities, energy and pharmaceutical employers and in higher-cost regions. This varies widely by sector, employer size and location, and roles with shift work, callout or site allowances can pay noticeably more.

What you'd actually do

Monitoring and troubleshooting control systems - PLCs (programmable logic controllers, the small industrial computers that run machinery), SCADA systems (supervisory control and data acquisition, the software operators use to watch and control a plant) and HMIs (human-machine interfaces, the touchscreens on the plant floor) - when an alarm fires or a line stops.
Walking the site or plant with maintenance and production staff to see what a fault actually looks like in the physical world, rather than diagnosing it from a desk.
Making controlled changes to control logic, network configuration or system settings, which usually means writing a change request, getting it reviewed, and testing it in a simulated or offline environment before it touches live equipment.
Patching and updating industrial systems during planned outages or maintenance windows, often at nights or weekends because the plant cannot stop during production.

Show 3 more

Building and maintaining an asset inventory - knowing exactly what controllers, switches, servers and software versions exist on site, which sounds dull but is the foundation of both reliability and security work.
Working on the data side: getting readings off the plant (temperatures, flows, machine states) into historians or dashboards so engineers and managers can see performance trends.
Attending cross-team meetings with IT, cyber security, process engineers and operations managers, often translating between groups who use different vocabulary for the same system.

How graduates get in

Graduate schemes at large industrial and infrastructure employers - utilities (water, electricity, gas), oil and gas, chemicals, pharmaceuticals manufacturing, food and drink manufacturing, rail and airports. This is the most common structured route; schemes are often badged as engineering, digital or IT graduate programmes with an OT rotation rather than advertised under this exact title.
Direct entry as a junior or graduate controls/automation engineer with a system integrator or automation contractor - companies that design and install control systems for clients. Common, and often a faster route to hands-on technical depth than a big corporate scheme.
Moving across internally from a general IT, networks or cyber security graduate role once you discover the operational side. Very common, because many employers struggle to recruit people who understand both IT and plant.
Starting on the engineering side - as a process, electrical or mechanical graduate engineer - and drifting towards the control and digital systems work. Also common, especially in manufacturing.

Show 2 more

Degree apprenticeships and higher apprenticeships in engineering or digital/technology solutions, which some utilities and manufacturers use heavily. This is an alternative to the graduate route rather than a follow-on from it.
Vendor or consultancy graduate roles - automation equipment manufacturers and engineering consultancies hire graduates who are then deployed onto client sites. Less common than the above but a genuine way in.

What employers ask for

A degree in electrical, electronic, control, mechatronic, chemical or mechanical engineering, computer science, cyber security or a related technical subject. The subject does matter here more than in many graduate jobs - employers want someone who can read a wiring diagram or understand a network, and pure non-technical degrees are rarely accepted.
A 2:1 is the common bar at larger employers, though smaller integrators and contractors are frequently more relaxed and weight practical ability and interest more heavily. Some employers accept a 2:2 with relevant experience or a strong technical interview.
Evidence of hands-on technical work - a final-year project involving embedded systems, robotics, automation or networking, a placement year in industry, or personal projects with microcontrollers, PLCs or home lab networking all help a lot.
A full UK driving licence is often required or strongly preferred, because the job involves travel between sites.

Show 2 more

Security clearance (such as BPSS or higher) is required for some employers, particularly in defence, nuclear, rail and parts of the energy and water sectors. This can affect eligibility, so check adverts carefully.
Professional qualifications are usually developed on the job rather than expected at entry: working towards IEng or CEng status through an institution such as the IET or IMechE is common, and employers may also fund vendor training in specific control platforms or industrial cyber security certifications.

Skills that matter

Understanding industrial control systems (PLCs, SCADA, HMIs)

These are the systems you are actually responsible for, and you need to understand how logic, sensors and actuators combine to make a physical process happen.

Networking fundamentals

Most OT problems turn out to be network problems - a misconfigured switch, a duplicate address, a broken link - so being comfortable with IP addressing, VLANs and industrial protocols is used almost daily.

Methodical fault diagnosis under pressure

When a production line or a pumping station is down, you need to isolate the cause logically rather than guessing, while people are asking for updates every few minutes.

Safety and risk awareness

A change that would be trivial in an office IT system can injure someone or cause an environmental incident on a plant, so you need to think through consequences before acting and follow permit and isolation procedures.

Translating between engineers and IT people

The two groups genuinely use different language and have different priorities (uptime versus patching, for example), and a large part of the job is getting them to agree on a workable approach.

Scripting and data handling (for example Python or SQL)

Pulling plant data into reports, automating repetitive checks and building dashboards is an increasing part of the role as sites digitise.

Putting these on a CV? We counted which skills 12,914 live graduate adverts ask for, and what to do with the answer — part of our application advice.

Where it leads

Graduate or junior engineer, usually one to three years, learning one site or one system family in depth, shadowing experienced engineers and gradually being trusted with live changes.
Engineer with ownership of specific systems or sites - you are the person called when a particular plant's control system misbehaves, and you lead smaller upgrade projects end to end.
Senior or lead engineer, taking design authority for control system architecture, specifying and approving changes, and supervising contractors on larger capital projects. Timelines here vary widely depending on employer size and how much project work you get exposed to.
From there the paths fork: a technical route towards principal engineer, control systems architect or OT security specialist; a management route towards engineering manager, operations manager or head of digital operations; or a consultancy route advising multiple clients, which often pays more but involves heavy travel.
OT cyber security is a notable specialist branch that has grown quickly, partly driven by regulation of critical national infrastructure, and people who combine plant knowledge with security skills tend to find the market strong.

What people get wrong

“It is basically IT support with a different name.”

The constraints are very different. Office IT can reboot a server or push an update overnight; a control system may have been running continuously for years, may use software no longer supported by its vendor, and may not be patchable at all without a planned plant shutdown. Much of the skill is in working safely within those limits.

“You sit in an office or a control room all the time.”

Site visits, plant rooms, substations, cabinets and occasionally confined or noisy environments are part of the job. Many roles involve PPE, site inductions and some callout or shift cover, and the proportion of desk to site work varies a lot by employer.

“The technology is all cutting-edge industrial internet of things and AI.”

Plenty of OT estates include equipment that is decades old and still perfectly functional. A realistic week mixes modern data and cloud work with keeping legacy kit alive, and knowing how to handle obsolete systems is a genuinely valued skill rather than an embarrassment.

“It is a niche job with few employers.”

Almost any organisation with physical operations needs this capability - water and energy companies, manufacturers, food producers, pharmaceutical plants, rail and airports, ports, hospitals and large commercial buildings - though the job title used varies enormously, which is why it can look rarer than it is.

Where this varies

The title covers quite different jobs depending on where you land. In heavy industry, energy and water it leans towards control and instrumentation engineering with a strong safety and regulatory culture, often including callout rotas and night or weekend outage work. In manufacturing and logistics it leans towards automation, production uptime and getting data off machines. In some organisations - particularly those with large IT functions - "operations technology" is framed primarily as a cyber security and network segmentation role, protecting plant systems from attack, with much less hands-on control engineering. Consultancies and system integrators give you breadth across many clients but a lot of travel; in-house roles give you depth on one estate. It is worth reading the advert and job description closely, because two roles with this title can require quite different backgrounds.

Search Operations Technology Engineer jobsFrom employers' own careers sites, updated daily Tailor your CV for this roleFree with an account, 3 a month

General guidance about the role across the UK market, not about any specific employer. Entry routes and requirements vary — always check the individual job advert.