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CNI Support Analyst

National Grid -
Cardiff

Apply Now

Job details

Full-time
£54,000 - £63,000 a year
10 days ago

Benefits

Cycle to work scheme
Annual leave
Company pension
Private medical insurance
Life insurance

Qualifications

Microsoft Word
Technical troubleshooting
Energy and utilities experience
Report writing
Report generation
Stakeholder collaboration
Stakeholder liaison
Microsoft Office Suite
Analysis skills
Presentation skills
Organisational skills
Technical writing
Multidisciplinary collaboration
Communication skills
Help desk

Full job description

Team

Information Technology and Digital

Business Unit

IT and Digital

Requisition No.

10772

City

Cardiff, GB, CF3 2EQ

Bristol, GB, BS2 0TB

Variable Base, GB, A1A 1AAA

Date posted

27 August 2026

CNI Support Analyst

About The Role

We have three exciting opportunities to join National Grid Electricity Distribution as a CNI Support Analyst. This includes two positions based at Avonbank, Bristol and one position based at Lamby Way, Cardiff.

As part of our IT & Digital Critical National Infrastructure (CNI) Support Team for South West & Wales, you'll play a vital role in supporting the critical systems that help keep electricity flowing to millions of customers every day. Reporting to the CNI Support Team Manager (South West & Wales), you'll work at the heart of our operational technology environment, ensuring key systems remain secure, available, and performing at their best.

You'll provide support across a range of business-critical platforms, including ADMS, PowerOn Mobile, HNV, TSDS, and iHost, helping to maintain and enhance the technology that underpins the operation of the electricity network. Working closely with operational, technical, and business teams, you'll troubleshoot issues, drive service improvements, and contribute to the ongoing reliability and resilience of our Critical National Infrastructure.

If you're passionate about technology, enjoy solving complex problems, and want to work in an environment where your contribution has a real impact on the communities we serve, we'd love to hear from you.

What You'll Do

As a CNI Support Analyst, you'll play a key role in supporting the technologies that help keep the electricity network running safely, securely, and reliably. Working within a highly collaborative team, you'll combine technical expertise, problem-solving, and stakeholder engagement to support a range of critical operational systems.

Key responsibilities will include:

Supporting ADMS and other Control Systems that are essential to the operation of the electricity network.
Managing and maintaining critical system data, including network models, SCADA, asset information, customer data, user accounts, and system diagrams.
Providing expert support and guidance to users, helping colleagues get the most from the systems they rely on every day.
Delivering user training and assisting with the adoption of new functionality and enhancements.
Developing automation requests to drive efficiency and improve operational performance.
Supporting Control Room operations, including the pre-commissioning of new substations and RTU functionality.
Investigating and resolving system issues, carrying out planned maintenance, and ensuring services remain resilient and available.
Testing new and existing functionality to support continuous improvement and system reliability.
Producing reports, data extracts, and insights that support operational and business decision-making.
Supporting the delivery of projects associated with ADMS and its connected systems.
Working closely with colleagues across the Control Centre, Dispatch, Contact Centre, and wider IT & Digital teams to deliver business-critical initiatives and improvements.
Assisting the CNI Support Team Manager with the day-to-day operation of the team and providing specialist support where required.
Ensuring all activities are carried out in line with company procedures, safety standards, and regulatory requirements.
Maintaining accurate records and documentation to support performance monitoring, compliance, and service improvement.
Providing timely support, data, and reporting to internal and external stakeholders.
Developing knowledge across a broad range of CNI technologies, with the flexibility to support different systems and services as business needs evolve.
Participating in an out-of-hours standby rota, helping to provide support for critical operational systems when it matters most.
Working across company locations when required and contributing to a variety of technical and operational initiatives.

This is an opportunity to work at the forefront of Critical National Infrastructure, supporting technology that has a direct impact on millions of customers and playing a key role in the future of the UK's energy network.

About You

We're looking for someone who enjoys solving problems, working collaboratively, and supporting technology that plays a vital role in keeping the electricity network running. Whether your background is in operational technology, IT support, control systems, or Critical National Infrastructure, you'll bring a proactive approach and a passion for delivering excellent service.

You'll be successful in this role if you have:

Experience working with Control Systems, Operational Technology (OT), or Critical National Infrastructure (CNI) environments, with knowledge of systems such as ADMS highly desirable.
A good understanding of SCADA, IT systems, data management, and user support activities.
Strong troubleshooting and analytical skills, with the ability to investigate issues and identify effective solutions.
Excellent communication skills, with the confidence to build relationships and communicate effectively with stakeholders at all levels.
A customer-focused mindset and a genuine commitment to delivering a high-quality support service.
The ability to work independently while also collaborating effectively as part of a wider team.
Experience producing reports, documentation, and presenting information clearly to both technical and non-technical audiences.
Strong organisational skills, with the ability to manage priorities and support multiple activities simultaneously.
Knowledge of safety, quality, and compliance standards within a technical or operational environment.
Proficiency in Microsoft Office applications, including Word and Excel.

It would be beneficial if you also have:

Experience working within NGED, electricity distribution, utilities, or other critical infrastructure environments.
Knowledge of SQL, shell scripting, or automation technologies.
Experience supporting ADMS or similar operational systems.
Project delivery or project support experience.

Most importantly, you'll be someone who thrives in a fast-paced environment, enjoys working with technology that makes a real-world impact, and is motivated by the opportunity to support systems that help power communities every day.

What You'll Get

Competitive Salary: circa £54,000 – £63,000 per annum (based on capability, and experience)

Additional benefits:

26 days’ annual leave, plus 8 statutory bank holidays, with the option to buy additional holiday days and swap up to 3 bank holidays to better suit your personal needs.
A generous pension scheme with double matching up to 6% of your salary each month. For every £1 you contribute, we’ll contribute £2 — meaning a 6% personal contribution becomes an 18% total pension contribution.
Life insurance cover of 10x your basic salary, plus employer contributions towards the cost of your Private Medical Insurance.
Flexible benefits such as a cycle scheme, share incentive plan, technology schemes
Access to apps such as digital GP service for round the clock access to GP video consultations and NHS repeat prescriptions, wellbeing app to support your health and fitness
Access to Work + Family Space, providing support and resources for work and family life, including paid emergency childcare and eldercare

Location: 2 vacancies based at Avonbank, Bristol and 1 vacancy based at Lamby Way, Cardiff
Hybrid Working: Yes
This role is offered on a full-time basis.
This role closes on the 11th September 2026, however we strongly encourage candidates to submit their application as early as possible.

Apply Now

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