Principal Network Engineer

Every day we deliver safe and secure energy to homes, communities, and businesses. We are there when people need us the most. We connect people to the energy they need for the lives they live. The pace of change in society and our industry is accelerating and our expertise and track record puts us in an unparalleled position to shape the sustainable future of our industry.

To be successful we must anticipate the needs of our customers, reducing the cost of energy delivery today and pioneering the flexible energy systems of tomorrow. This requires us to deliver on our promises and always look for new opportunities to grow, both ourselves and our business.

IT and Digital works in a harmonised partnership with the National Grid group of diverse energy businesses to deliver technology which revolutionises the way we operate. As we lead the charge towards a carbon‑free future, our teams are embracing disruptive changes in our industry by working with Agile methodologies and adopting Digital mindsets to drive efficiency and bring new capabilities for our internal and external customers.

Our work here is critical. National Grid moves energy to millions of homes and businesses in the UK and US and the technology we utilise to complete that task is down to us. The successful applicant for this position will be an integral contributor towards this goal and we will support your professional development as part of our multi‑cultural, customer‑centric global team.

This role operates under a hybrid working model and is based out of the Warwick, UK office. Hybrid work expectations are subject to business needs and company policy.

Our vision is to be recognised as a world leading Information Technology and Digital function in the energy sector and a trusted partner across National Grid businesses.

In the Principal Network Engineer role, you will lead the design, implementation, and lifecycle management of resilient, secure, and scalable WAN, LAN, WLAN, and SD‑WAN network services.

You will create accurate low level designs and implementations plans adhering to defined standards, provide strategic guidance on network architecture and technology direction, and ensure operational readiness, security, performance, and reliability across enterprise network platforms.

You will lead on the creation and adoption of network engineering standards, with a view to adopting a automation first mindset and ensuring alignment to relevant technical roadmaps, working closely with Technical Leads, Architects and other engineers.

Bringing a calm, measured approach to incident response—even in challenging situations—you’ll provide clear technical direction grounded in integrity and aligned with National Grid’s values.

You’ll also have the presence and credibility to engage senior stakeholders, provide authoritative technical leadership, and communicate complex concepts in a clear and meaningful way aligned to project outcomes.

As an employee in the Principal Network Engineer role, your key roles and responsibilities will include:

• Design, implement, and maintain WAN, LAN, WLAN, and SD‑WAN infrastructure, ensuring high availability, security, resiliency, and scalability.
• Provide technical expertise and strategic guidance on network architecture, upgrades, lifecycle management, and emerging technologies to meet evolving business needs.
• Lead network projects and complex technical work streams, acting as both a team leader and an individual contributor to deliver outcomes on time and within budget.
• Collaborate with internal stakeholders, managed service providers, and vendors to ensure requirements are understood, risks are managed, and solutions are delivered effectively.
• Create and maintain comprehensive network documentation including network engineering standards, configurations, diagrams, low‑level designs, implementation records, as‑built documents, and operational processes.
• Support major incidents, problem investigations, and escalations relating to network services or performance, driving troubleshooting to resolution and identifying structural improvements.
• Support planned network changes and maintenance…