Salary: £45,000 - 52,000 per year Requirements: Strong hands-on experience with MPLS, particularly Layer 3 VPNs. Solid understanding of BGP, VXLAN, and large-scale routing environments. Proven experience designing and deploying network infrastructure. Confident leading technical projects and delivering complex network changes. Skilled in troubleshooting and configuration across multi-vendor environments. Experience with Cisco ASA and Fortinet firewalls. Comfortable balancing project delivery with BAU operational tasks. Must be eligible for SC Clearance. Responsibilities: Lead and deliver network infrastructure projects, including data centre consolidation and migration activities. Design, configure, and deploy switches and other core networking equipment. Support and maintain MPLS environments, with a strong focus on Layer 3 VPNs. Troubleshoot and optimise BGP, VXLAN, and other advanced routing technologies. Carry out BAU tasks such as firmware upgrades, patching, and general network maintenance. Provide expert support across the core network to ensure resilience and high performance. Work with Cisco ASA and Fortinet firewalls to maintain secure network operations. Technologies: Cisco Firmware Support MPLS Network DevOps More: We are a leading Managed Services Provider seeking a Senior Network Infrastructure Engineer to join our Core Networking team on a remote-based 12-month fixed term contract. This internal, non-client facing role is crucial for supporting major infrastructure projects while ensuring the stability and performance of our large-scale, business-critical environment. We offer a competitive salary of up to £52,000 and the opportunity to work on complex migrations, data centre consolidations, and the ongoing optimisation of a high-availability network. last updated 8 week of 2026