OT Security Engineer

About the role

Help secure the systems powering the UK's energy future.

At National Grid Interconnectors, you'll play a vital role in protecting and maintaining the operational technology (OT) systems that keep our critical infrastructure running safely, securely and reliably.

As an Operational Technology Security Engineer, you'll work hands-on with OT systems, networks and cyber security controls across our interconnector assets. From maintaining and troubleshooting critical systems to supporting cyber resilience, incident response and asset lifecycle management, you'll help ensure our operations remain secure and available 24/7.

The role is based on site at our site in Fareham, so you must live a commutable distance from site with a full UK driving licence to be considered for this role.
 

What you'll do

• Support the operation, maintenance and security of OT systems, networks and infrastructure.
• Manage system updates, patching, backups, recovery activities and asset lifecycle processes.
• Assist with fault investigations, incident response and vulnerability remediation.
• Work closely with operations teams, engineers, suppliers and cyber specialists to deliver secure solutions.
• Maintain technical documentation and supporting compliance across critical systems.

What you'll need

• Experience with Operational Technology, SCADA, industrial control systems, networks or similar environments.
• Knowledge of networking fundamentals, including switches, firewalls and troubleshooting.
• An understanding of OT cyber security principles, including access management, patching and incident response.
• Strong problem-solving skills and the ability to work in safety and security-critical environments.
• Excellent communication skills and a collaborative approach to working with technical and operational stakeholders.

Join us and help protect the technology that enables cleaner, more secure energy connections across Europe.

What you'll get

A competitive salary between £47,442 - £56,173  per annum– dependent on capability.

As well as your base salary, you will receive a bonus based on personal and company performance and a competitive contributory pension scheme where we will double match your contribution to a maximum company contribution of 12%. You will also have access to a number of flexible benefits such as a share incentive plan, salary sacrifice car and technology schemes, support via employee assistance lines and matched charity giving to name a few.

More Information

This role closes on 24th July 2026 at 23:59, however we encourage candidates to submit their application as early as possible and not wait until the published closing date as this can vary. 

We value diversity and are committed to creating an inclusive workplace for all. We welcome applications from all suitably qualified candidates – we make appointments purely on merit, assessed against objective selection criteria. We support flexible working and will make reasonable adjustments throughout the recruitment process should you have any physical or mental impairment which may affect your ability to participate in the process.

Please note that in most cases, National Grid is unable to offer sponsorship for employment under the UK points-based immigration system. As such, applicants must have the legal right to work in the UK without requiring sponsorship now or in the future under the UK points-based immigration system. However, in exceptional circumstances where there is a clear and demonstrable need for specialist skills that cannot be sourced from the local labour market, National Grid may consider offering sponsorship. All applications are welcome from candidates who meet these requirements, regardless of race, nationality, or ethnic origin.