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National Grid Electricity Transmission (NGET) is at the heart of energy in the UK. The electricity we provide gets the nation to work, powers schools and brings energy to life. Our energy network connects the nation, so it is essential that it is continually evolving, advancing, and improving.

We’re passionate about operating our network safely and providing highly reliable quality of supply for our customers. At the heart of achieving these outcomes is the effective control, operation and security of our network.

We are seeking a Lead OT Security Engineer to strengthen the cybersecurity of our Critical National Infrastructure (CNI) and Operational Technology (OT) environments. You will focus on securing complex CNI and OT systems while collaborating with engineering, operational and programme teams, alongside leading NGET’s technical engagement with Ofgem and NCSC on CNI security enhancements.

This role is based in Warwick for 2 days per week and can be combined with hybrid working from home.

Key Responsibilities

• Serve as a technical lead for cybersecurity within CNI and OT environments, providing practical guidance to ensure secure implementation of system changes in-line with regulatory, industry and project-specific expectations.
• Work closely with cross-functional teams to embed cybersecurity throughout the full system lifecycle, from initial design, through deployment and into ongoing support.
• Offer deep subject matter expertise in securing OT, CNI and SCADA systems, with a focus on applying and validating appropriate security controls across diverse environments such as hybrid systems, legacy infrastructure and industrial control platforms.
• Lead the execution of cyber maturity and risk assessments, and support threat model development and tailored control frameworks to identify and mitigate risks effectively.
• Contribute to the development, review and maintenance of key assurance documentation such as security cases, risk registers, control effectiveness frameworks and regulatory compliance evidence.
• Provide coaching and technical mentorship to colleagues, fostering a collaborative OT Security team.
• Actively engage in knowledge exchange and initiatives aimed at enhancing OT and CNI cybersecurity capabilities.

What You'll Need

• A degree (or equivalent experience) in Cybersecurity, Systems Engineering, Electrical/Electronic Engineering or a related technical discipline
• Recognised cybersecurity certifications: CISSP, CISM, GICSP or equivalent
• Technical certifications or training aligned to OT security: ISA/IEC 62443, GIAC GICSP/GRID, SCADA/ICS Security or equivalent.
• Understanding and hands-on experience in securing CNI, OT or high availability data centres.
• Understanding of UK regulatory, cybersecurity or industrial frameworks, such as NIS/NIS2, CAF, NIST, ISA/IEC 62443 and ISO/IEC 27001.
• Experience in collaborating across multi-disciplinary teams, such as IT, OT, and security functions, with strong stakeholder management skills.
• Experience in Electricity Transmission, Gas Transmission is desirable.
• A good understanding of National Grid’s business objectives and its obligations to wider industry participants and regulatory authorities.
• We value evidence of continued professional development aligned with OT security trends, CNI resilience and cybersecurity.

What's in it for you?

• A salary of £61,400 to £77,000 + Benefits package + Training and Development, plus £3,000 Market Supplement
• 26 days annual leave plus 8 statutory days, with the option to buy additional or sell holiday days.
• Generous contributory pension scheme - we will double-match your contribution to a maximum company contribution of 12%. Overall 18%.
• Financial support to help cover the cost of professional membership subscriptions, course fees, books, exam fees and time off for study leave – relevant to your role.
• Access to 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.
• Family care benefits including a back-up care service for when your usual care arrangements fall through (six paid days each year as standard with the option to purchase further days).
• Access to apps that support health, fitness and wellbeing.

More Information

This role closes at midnight on 30th July 2025, however we encourage candidates to submit their application as early as possible and not wait until the published closing date as this can vary.

Don’t meet every single requirement? At National Grid, we are committed to building a diverse, inclusive and authentic workplace for everyone. So if you are excited about this role but your experience or qualifications do not match the job description exactly, we encourage you to apply anyway. You might just be the right person for our growing business in this role or another one.

At National Grid, we work towards the highest standards in everything we do, including how we support, value and develop our people. Our aim is to encourage and support employees to thrive and be the best they can be. We celebrate the difference people can bring into our organisation, and welcome and encourage applicants with diverse experiences and backgrounds, and offer flexible and tailored support, at home and in the office.

Our goal is to drive, develop and operate our business in a way that results in a more inclusive culture. All employment is decided on the basis of qualifications, the innovation from diverse teams & perspectives and business need. We are committed to building a workforce so we can represent the communities we serve and have a working environment in which each individual feels valued, respected, fairly treated, and able to reach their full potential.

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