Senior Core Network Engineer

Senior Core Network Engineer | 6 months initially | 2 days on site | London, Chester or Bromley | £465 p/d | Inside IR35

We're seeking an experienced Senior Core Network Engineer to support the evolution of a large-scale enterprise network.

This role would suit an engineer with extensive experience in Cisco core networking technologies, network automation, and delivering large-scale infrastructure projects within enterprise or service provider environments.

What You'll Be Doing

• Design, implement and optimise large-scale core network infrastructure.

• Lead network transformation programmes, hardware refreshes and platform upgrades.

• Deliver end-to-end migration activities, including planning, implementation and rollback strategies.

• Build and enhance network automation capabilities using Cisco NSO and modern automation technologies.

• Support routing, switching and optical networking across a global environment.

• Produce technical documentation, engineering standards and implementation plans.

• Work closely with architecture, operations and project teams to deliver strategic infrastructure initiatives.

• Troubleshoot complex networking issues and drive continuous service improvements.

What We're Looking For

• Extensive experience engineering enterprise or service provider core networks.

• Strong expertise with Cisco IOS-XR.

• Hands-on experience with Cisco NSO and network automation.

• Excellent knowledge of MPLS, Segment Routing (SR-MPLS), BGP, OSPF and ISIS.

• Experience with Cisco 8000, ASR9000 or NCS platforms.

• Strong understanding of WAN and optical networking technologies.

• Experience with Python, YANG, NETCONF or REST APIs for network automation.

• Proven experience delivering large-scale network migrations, software upgrades and infrastructure transformation programmes.

Desirable Experience

• CCNP or CCIE certification.

• Infrastructure as Code using Terraform or Ansible.

• Experience within highly regulated or financial services environments.

• Knowledge of cloud networking, DevOps methodologies or Arista technologies.

If this sounds like a fit, APPLY NOW!

Senior Core Network Engineer | 6 months initially | 2 days on site | London, Chester or Bromley | £465 p/d | Inside IR35

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