Senior OT Engineer

About the role

At National Grid, we're powering the energy transition and connecting millions of people to cleaner, greener energy.

Our Interconnectors business plays a vital role in supporting the UK's journey to net zero, operating critical HVDC interconnectors that connect the UK with neighbouring energy markets.

As we continue to expand our portfolio and invest in the future of energy, we're looking for a Senior Operational Technology (OT) Engineer to help ensure our operational systems remain resilient, secure, and available around the clock.

In this role, you'll be responsible for the performance, maintenance, security and lifecycle management of critical OT systems, networks and cyber assets that underpin the safe operation of our interconnectors. Working across a portfolio of nationally important infrastructure, you'll combine hands-on engineering expertise with a strong focus on cyber security, operational resilience and continuous improvement.

This is an exciting opportunity to work at the intersection of operational technology, networking and cyber security while making a tangible contribution to the UK's energy future.

The role is based on site at Fareham therefore we will consider candidates who are within an hours commute to site and have a full UK driving licence.

What you'll do

As a Senior Operational Technology Engineer, you will:

• Lead the installation, maintenance, refurbishment and fault resolution of OT systems, networking equipment and cyber assets.
• Design, implement and manage improvements to operational technology and cyber security systems.
• Support the delivery of new projects, including procurement, tendering and technical design activities.
• Manage routine operational activities including system updates, backups, patching, antivirus management and access reviews.
• Monitor system performance, asset health and reliability, identifying opportunities to improve resilience and availability.
• Support incident response, recovery planning and restoration activities across critical operational systems.
• Work closely with operational teams to develop, test and refine incident response and business continuity plans.
• Manage changes to hardware, software and network infrastructure through robust change control processes.
• Oversee physical and logical security controls across OT environments, helping protect critical national infrastructure.
• Lead assurance, audit and compliance activities, ensuring adherence to regulatory and cyber security requirements.
• Provide technical guidance and training to operational teams, supporting capability development across the business.
• Support maintenance and project delivery activities across the wider Interconnectors portfolio, including occasional travel to sites.

What you'll need

We're looking for someone with experience in operational technology, industrial control systems, networking or cyber security within a critical infrastructure or industrial environment.

Essential experience

• Experience working with operational technology environments, including control systems, monitoring systems, protection systems or industrial networks.
• Strong understanding of system maintenance, fault finding and operational support activities.
• Knowledge of cyber security principles, including access management, patching, backup and recovery, vulnerability management and incident response.
• Experience working safely within operational or engineering environments.
• Excellent communication and stakeholder management skills.
• A proactive, problem-solving mindset with the ability to work independently and as part of a wider team.
• Full UK driving licence.

Desirable Experience

• Experience within utilities, energy, industrial automation or critical infrastructure sectors.
• Knowledge of OT networking technologies and cyber security standards.
• Familiarity with asset management systems such as Maximo, Ellipse, Ultimo or IFS.
• Networking certifications such as Cisco, CompTIA or equivalent.
• Awareness of industry standards such as ISA/IEC 62443.
• Understanding of regulatory frameworks including NIS regulations.
• Competent Person authorisation or working towards achieving it.
• HNC/HND, NVQ, apprenticeship or equivalent qualification in Engineering, IT, Telecommunications or a related discipline.

What you'll get

A competitive salary between £54,090 - £63,940 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.

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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.