Senior Network Engineer

We are seeking a highly skilled and experienced Senior Network Engineer to lead the design, implementation, and support of enterprise-scale network infrastructure. This role blends hands-on engineering with strategic design and operational delivery, operational support, both on-prem and cloud-based environments. You will be responsible for architecting secure, scalable, and resilient network solutions that meet business and security requirements, while 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 (AWS/Azure).

• Implement and manage network services including VPNs, VLANs, QoS, DNS, DHCP, ACI and Evpn and segmentation.

• Deploy and support enterprise-grade firewalls, 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 optimize for reliability.

• Document network architecture, configurations, and failover strategies.

• Ensure alignment with IT policies, audit requirements, and industry best practices.

• Keep abreast of relevant technologies in the area -Reading, attending briefings and talks.

• 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).
• Strong documentation and diagramming skills (e.g., Visio, Lucidchart).

Skills and Experience

Essential:

• Cisco Certified Network Professional (CCNP) or equivalent experience (CCNA minimum).

• Strong expertise in switching, routing, firewalling, wireless networks, and network security.

• Proven experience 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.

• Ability to provide - on call, as a service to the business as part of a team

Experience you'd be expected to have Mandatory

• 5+ years of engineering experience in delivering Enterprise Scale Networking topology, design, build and support.

Advantageous

• Bachelor's/Master's degree in Computer Science, Information Systems, Engineering, or other related fields

• 10% on target bonus
• BT Pension scheme, minimum 5% Employee contribution, BT contribution 10%
• From January 2025, equal family leave: receive 18 weeks at full pay, 8 weeks at half pay and 26 weeks at the statutory rate. It's for all parents, no matter how your family is made up.
• Enhanced women's health support: including help with menopause symptoms, cancer screenings, period care and more.
• 25 days annual leave (not including bank holidays), increasing with service
• 24/7 private virtual GP appointments for UK colleagues
• 2 weeks carer's leave
• World-class training and development opportunities
• Option to join BT Shares Saving schemes