Job Description
Core Network Engineer - Portsmouth - Up to £55,000
If you're passionate about networks and have the expertise to deliver reliable, high-performance connectivity we have a perfect role for you.
Our client is seeking an experienced Core Network Engineer to join their team and support the design, deployment, and management of their full-fibre broadband network across the South of England.
The Role
Based in Portsmouth with travel to data centres and network sites as needed, you will:
* Configure and manage Layer 2 and 3 network elements (Routers, Switches, CGNAT, Firewalls/VPNs, OLTs).
* Optimise traffic and manage peering and transit connections.
* Monitor and troubleshoot network performance, resolving issues effectively.
* Perform upgrades, security patching, and technology refreshes.
* Maintain network documentation and best practices.
* Collaborate with vendors and support teams.
Requirements
1. 5+ years of network engineering experience in an ISP environment.
2. Strong Juniper expertise (command line essential); certifications such as JNCIS-SP or JNCIS-ENT preferred.
3. Deep knowledge of IPv4/IPv6, EVPN, MPLS, VXLAN, CGNAT, DHCP, DNS, and GPON networks.
4. Experience with FTTH platforms, particularly OLTs.
5. Strong tro...