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OT Network Security Analyst

National Grid -
Warwick

Apply Now

Job details

£47,400 - £60,000 a year
5 days ago

Benefits

Annual leave
Company pension
Car scheme

Qualifications

Firewall
IDS
Splunk
Computer networking
Cybersecurity
Communication skills
Network Security
VPN

Full job description

Team

Engineering

Business Unit

Electricity Transmission

Requisition No.

9383

City

Warwick, GB, CV34 6DA

Date posted

17 June 2026

OT Network Security Analyst

About Us

At National Grid, we light up the world by harnessing the unique strengths of our people. Join us as a OT Network Security Analyst to be part of a team that's driving forward the energy transition, creating a brighter, more sustainable future for all. Unleash your superpower and bring energy to life.

National Grid is hiring a OT Network Security Analyst - This position is based from our Warwick office however we offer flexible hybrid working options.

Job Purpose

As a Network Security Analyst, you’ll play a key role in strengthening the cybersecurity of NGET’s Operational Technology (OT) environment. Working closely with engineering, risk and security teams, you’ll support cybersecurity assessments and audits across the OT estate, contribute to risk and vulnerability assessments, and help design and implement controls that protect our operational systems from cyber threats.

You’ll develop and maintain security specifications, procedures and incident response documentation, while supporting the creation of business cases for mitigation plans. You’ll also contribute to security training and awareness activities, ensuring colleagues understand evolving risks.

In this role, you’ll help deploy and manage network security technologies, enforce access controls, and monitor network activity to identify and respond to potential threats. Staying up to date with emerging OT cybersecurity trends, vulnerabilities and technologies will be central to your success.

This role is based in Warwick two days a week, with hybrid working available.

What You'll Need

Experience with OT systems such as protection and control or other ICS environments.
Hands‑on use of SIEM tools (e.g., Splunk), security monitoring and vulnerability management.
Ability to analyse network traffic and respond to security incidents.
Understanding of electrical power systems.
Strong grasp of network security principles and technologies (firewalls, VPNs, IDS/IPS, segmentation).
Good knowledge of networking and protocols.
Ability to turn data into clear insights.
Strong written and verbal communication skills.
Analytical, critical thinker.
Degree or equivalent experience in cybersecurity or a related field.

Desirable

Strong problem‑solving skills in complex security environments.
Relevant certifications, such as: ISA/IEC 62443, GCIA, GNFA, GICSP, or Certified in Cybersecurity (CC).

What You'll Get

A competitive salary of £47,400 – £60,000 per annum

Annual Performance Based Bonus
37 hour working week. Flexible
26 days annual leave, plus eight statutory days
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%
Financial support to help cover the cost of professional membership subscriptions, course fees, books, exam fees and time off for study leave – so long as it is relevant to your role
Access to several 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 a numerous apps which support health, fitness and wellbeing.

The closing date for this vacancy is 3rd July. However, we encourage candidates to submit their applications as early as possible and not to wait until the published closing date. National Grid’s recruitment periods can and may vary. We reserve the right to remove this advert or close it to further applications at any point during the recruitment process.

In NGET we are passionate about both 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 and operation of our network.

To find out more about us, please follow the link below:

https://www.nationalgrid.com/electricity-transmission/

DE & I statement

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.

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.

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