OT Network & Infrastructure Engineer

IT4Automation Limited; Epsom; On-site; GBP 28,000 - 36,000; Full time

Job summary

IT4Automation is seeking an OT Network & Infrastructure Engineer to join our engineering team in Epsom, Surrey. This hands-on role covers network infrastructure delivery, NOC/SOC service desk support and customer-site work, with a focus on Operational Technology and Critical National Infrastructure.

You’ll work with switches, routers, firewalls, VPNs and related systems, contributing to monitoring, incident response and documentation.

Qualifications

• 2–5 years in network engineering, infrastructure support or cyber operations.
• Interest in OT environments and cybersecurity fundamentals.
• Willingness to learn and work across projects and support services.

Responsibilities

• Design, implement and maintain OT network infrastructure.
• Work with switches, routers, firewalls and VPNs.
• Support NOC/SOC service desk operations.
• Monitor alerts, incidents and service requests.
• Produce technical documentation and configuration records.
• Support customer projects from prep to delivery and handover.

Skills

Network engineering

NOC/SOC operations

VPNs

Switching & routing

Windows/Linux servers

Cyber security fundamentals

Documentation

Tools

Cisco equipment

Fortinet/Palo Alto

VMware/Hyper-V

SIEM/monitoring

PowerShell/Bash

Job description

Sector: Operational Technology / Critical National Infrastructure

Role type: Full-time

OT Network & Infrastructure Engineer

Company: IT4Automation

Sector: Operational Technology / Critical National Infrastructure

Role type: Full-time

Location: Epsom Surrey

Salary: £28-£36K

Start date: October 2026

About IT4Automation

IT4Automation provides specialist project, NOC and SOC services for Operational Technology environments, with a focus on Critical National Infrastructure.

We work with organisations where reliability, security and operational continuity really matter. Our team supports industrial networks, infrastructure and cyber monitoring services across environments where downtime and poor change control can have significant real-world impact.

We are a small, capable and growing business with a strong engineering culture. Our team works closely together, supports one another and takes pride in delivering high-quality work for customers in complex operational environments.

The Role

We are looking for an OT Network & Infrastructure Engineer to join our engineering team.

This is a hands-on technical role covering a mix of:

• OT network and infrastructure project delivery
• NOC / SOC service desk support
• Customer site work
• Monitoring and incident response
• Internal systems improvement
• Technical documentation and change control

You will work alongside experienced engineers across external projects, managed service operations and internal improvement initiatives.

This role would suit someone with a 2-5 year background in network engineering, infrastructure support, cyber operations or industrial systems who is looking to develop within the specialist field of Operational Technology.

OT experience is useful, but not essential. The right attitude, technical curiosity and willingness to learn are just as important.

What You’ll Be Doing

• Supporting the design, implementation and maintenance of OT network infrastructure.
• Working with switches, routers, firewalls, VPNs and associated infrastructure.
• Supporting NOC / SOC service desk operations.
• Monitoring alerts, incidents, tickets and service requests.
• Troubleshooting network, infrastructure and security-related issues.
• Supporting customer projects from preparation through to delivery and handover.
• Producing and maintaining technical documentation, diagrams and configuration records.
• Assisting with monitoring, logging, backup and resilience improvements.
• Supporting secure remote access, segmentation and cyber security improvements.
• Working on customer sites where required.
• Contributing to continuous improvement of internal processes, tooling and standards.

What We’re Looking For

We are looking for someone who is technically capable, reliable and keen to grow with the business.

You do not need to know everything from day one, but you should have strong fundamentals and a genuine interest in networks, infrastructure, cyber security and operational technology.

You are likely to have experience in some of the following areas:

• Network engineering or infrastructure support
• Switching, routing, VLANs, firewalls and VPNs
• TCP/IP troubleshooting
• Windows and/or Linux server environments
• Virtualisation platforms
• Monitoring, logging or alerting tools
• Service desk, NOC or SOC environments
• Cyber security fundamentals
• Customer-facing technical support
• Technical documentation and change control

Experience with industrial, manufacturing, utilities, energy, transport, water or other OT environments would be beneficial.

Useful Technologies & Knowledge

Experience with any of the following would be useful:

• Cisco, Fortinet, Palo Alto, Juniper, Hirschmann, Moxa or similar
• Microsoft Windows Server / Active Directory
• Linux administration
• VMware or Hyper-V
• SIEM, log management or monitoring platforms
• PowerShell, Python or Bash scripting
• Backup and disaster recovery technologies
• Industrial networks, SCADA, PLCs, DCS or telemetry systems
• IEC 62443, NIST CSF, ISO 27001 or similar cyber security frameworks
• ITIL or service management processes

What Kind of Person Fits Well Here?

We have a strong team culture, so fit is important.

You will probably enjoy this role if you are:

• Calm and reliable under pressure
• Methodical and detail-conscious
• Curious and keen to learn
• Comfortable working as part of a close-knit team
• Willing to ask questions and share knowledge
• Professional with customers
• Security-minded
• Good at following process and documenting your work
• Interested in critical infrastructure and operational technology
• Happy working across both projects and support services

We are looking for someone who takes pride in doing things properly and wants to develop within a specialist technical environment.

What We Offer

• A chance to work in the growing field of Operational Technology and cyber security
• Exposure to Critical National Infrastructure environments
• Varied work across projects, NOC, SOC and internal systems
• Support from an experienced and collaborative engineering team
• Opportunities for technical development and certification
• A strong team culture where people support each other
• The ability to make a real impact in a growing business

Why Join IT4Automation?

This is an opportunity to join a specialist business at an exciting stage of growth.

You will be part of a team that works on meaningful projects in environments where engineering quality, reliability and security genuinely matter.

If you enjoy solving technical problems, working with good people and building your skills in OT networks, infrastructure and cyber security, we would like to hear from you.