Senior Network Engineer

Senior Network Engineer – Locations: Sheffield, London, Birmingham, Manchester, Bristol

Overview

We are seeking three experienced Senior Network Engineers to lead the design, implementation and support of enterprise‑scale network infrastructure. This role blends hands‑on engineering with strategic design and operational delivery across both on‑prem and cloud‑based environments. You will architect secure, scalable and resilient network solutions that meet business and security requirements, collaborating across multidisciplinary teams to ensure seamless service delivery.

What You’ll Be Doing

• Design, configure and maintain enterprise‑scale LAN, WAN and hybrid cloud networks.
• Implement and manage network services including VPNs, VLANs, QoS, DNS, DHCP, ACI, EVPN and segmentation.
• Deploy and support enterprise‑grade routers, switches and load balancers.
• Collaborate with security teams to enforce access controls and ensure network compliance.
• Troubleshoot complex network issues and perform root cause analysis.
• Monitor network performance, conduct capacity planning and optimise for reliability.
• Document network architecture, configurations and fail‑over strategies.
• Ensure alignment with IT policies, audit requirements and industry best practices.
• Stay up to date with relevant technologies through reading, attending briefings and talks.

Essential Skills / Experience

• Cisco Certified Network Professional (CCNP) or equivalent experience (CCNA minimum).
• Demonstrable expertise in switching, routing, load balancing and network security.
• Track record of delivering complex network solutions within time, cost and quality targets.
• Ability to dissect and resolve technical problems through structured analysis.
• Experience building effective partnerships across diverse teams and technologies.
• Awareness of industry trends and ability to align network strategy with broader business goals.
• Willingness to participate in an on‑call rota as a service to the business as part of a team.

Desirable Skills / Experience

• Experience with enterprise‑scale on‑prem virtualisation (VMware).
• Experience with cloud networking (AWS, Azure, hybrid environments).
• Familiarity with SD‑WAN, network automation and infrastructure‑as‑code.
• Knowledge of Cisco, Juniper, Palo Alto or other enterprise networking platforms.
• Exposure to monitoring tools (e.g. SolarWinds, PRTG, NetFlow).
• Effective documentation and diagramming skills (e.g. Visio, Lucidchart).
• Bachelor’s or Master’s degree in Computer Science, Information Systems, Engineering or other related fields.

Our Package

• 10% on target annual bonus
• Access to an online private GP 24/7 for you and your immediate family
• Market‑leading paid carers leave with up to 2 weeks off
• Equalised maternity, paternity and adoption leave – 18 weeks full pay and 8 weeks half pay
• Discounted EE and BT products, including mobile and broadband
• Market‑leading pension scheme – 5% from you and 10% from us
• Holiday purchase scheme

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