CNI Infrastructure Engineer

About us

At National Grid, we keep people connected and society moving. But it’s so much more than that. National Grid supplies us with the environment to make it happen. As we generate momentum in the energy transition for all, we don’t plan on leaving any of our customers in the dark. So, join us as a CNI Infrastructure Engineer, and find your superpower.

National Grid is hiring a CNI Infrastructure Engineer for our CNI Operations team. This role is based at our Warwick office, with hybrid working. You’ll play a key role in designing, developing and supporting secure, scalable infrastructure platforms that underpin critical operations across our enterprise.

About The Role

Join National Grid’s CNI Operations Team as a CNI Infrastructure Engineer, where you’ll be at the heart of keeping the UK’s critical national infrastructure running safely, securely, and at scale. This is a role with real purpose — the work you do will directly support systems that millions of people rely on every day.

 
In this role, you’ll be at the forefront of designing, building and maintaining automation solutions that eliminate manual effort, boost reliability, and accelerate the delivery of IT operations. You won’t just support change—you’ll lead it, modernising and enhancing how we work across our data centres, networks, and platform environments.

 
Your focus will be on automating the end‑to‑end lifecycle of our private cloud infrastructure—from provisioning and configuration to monitoring and day‑to‑day operational routines. You’ll help us unlock new levels of speed, efficiency and consistency across our estate.

What You'll Do

As a CNI Infrastructure Engineer, you’ll be a driving force behind transforming how National Grid delivers and operates mission‑critical technology. Your work will directly accelerate efficiency, resilience, and innovation across our private cloud and infrastructure landscape.
In this role, you will:

• Build infrastructure the modern way, developing and maintaining Infrastructure as Code (IaC) using tools such as Terraform and Ansible  


• Create reusable, scalable automation assets, including scripts, modules, and frameworks  


• Develop and optimise CI/CD pipelines using platforms like GitHub Actions and GitLab CI  


• Engineer automation solutions using Python, PowerShell or Bash  


• Take ownership of our core server estate, managing and optimising physical and virtual environments, including VMware VCF and ESXi  


• Deliver robust Linux administration across enterprise environments, covering installation, configuration, patching, and system hardening  


• Administer enterprise storage solutions (SAN/NAS, object storage) and backup technologies such as Veeam  


• Engineer and maintain resilient networking environments across LAN/WAN, SD-WAN, VLANs, BGP/OSPF, VPNs, load balancers, and firewalls  


• Support platform reliability through monitoring, troubleshooting, performance optimisation, and capacity planning  


• Contribute to incident response, root cause analysis, and 24/7 on-call support where required  


• Drive automation of operational processes, reducing manual effort and improving efficiency  


• Champion security best practices across patching, vulnerability management, IAM, and network segmentation  


• Collaborate with SRE, security, application, and architecture teams on new services and complex changes  


• Support disaster recovery planning and testing, ensuring high availability and resilience across the platform 

About You

You’re someone who thrives in complex technical environments and loves getting under the hood of enterprise infrastructure. You bring a blend of solid engineering fundamentals, problem‑solving instincts, and a curiosity to keep learning. Here’s what you’ll bring to the team:

• A deep understanding of enterprise IT infrastructure — from compute and storage to backups, networks, operating systems (Windows/Linux), and middleware.


• Experience with Infrastructure as Code, using tools like Terraform and Ansible to build and manage environments more efficiently.


• Scripting capabilities in PowerShell, Bash, or Python — and a willingness to automate anything that can (and should!) be automated.


• Strong, hands‑on experience with Linux systems in enterprise environments, including installation, configuration, administration, troubleshooting, performance tuning, patching, and security hardening.


• Strong knowledge of Active Directory Domain Services, with the ability to design, manage, and troubleshoot directory‑based environments.


• Hands‑on virtualisation expertise, especially with VMware vSphere and VCF.


• A confident grasp of networking essentials, including TCP/IP, DNS, DHCP, routing, switching, and firewalls.


• Familiarity with backup and disaster recovery strategies, high‑availability designs, and business continuity principles.


• Knowledge of modern storage solutions such as vSAN, NAS, and object storage platforms.


• A proven track record of solving tricky, multi‑layered technical issues, often across several technologies at once.


• Excellent communication skills, with the ability to translate complex technical concepts into clear, understandable language for non‑technical stakeholders.

What You'll Get

Competitive Salary: circa £54,000 – £65,000 per annum (based on capability, and experience)
 

Additional benefits:

• A competitive contributory pension scheme where we will double match your contribution to a maximum company contribution of 12%


• You will receive a bonus based on personal and company performance


• 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
   
   

More information

• This role is offered on a full time basis.


• This role will require National Security Vetting (NSV) checks.  


• We are also offering hybrid /flexible working. Base location for this role will be NG House, Warwick.


• This role closes on 30th June however we strongly encourage candidates to submit their application as early as possible. 
   

**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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Diversity, Equity and Inclusion

National Grid is an equal opportunity employer that values a broad diversity of talent, knowledge, experience and expertise.  We foster a culture of inclusion that drives employee engagement to deliver superior performance to the communities we serve.  National Grid is proud to be an affirmative action employer. We encourage minorities, women, individuals with disabilities and protected veterans to join the National Grid team.