Senior Network Engineer

Salary: £60,000 - 65,000 per year

Requirements:

• Strong senior-level network engineering experience within an MSP, ISP or service-provider environment
• Extensive hands-on BGP experience, including design, peering, route policy and production troubleshooting
• Strong Cisco routing and switching experience, particularly Cisco Nexus and ASR
• Excellent Layer 2 and Layer 3 networking knowledge, including VLANs, trunking, STP, EIGRP and network redundancy/HA
• Datacentre networking experience, including resilient network design and structured cabling
• Strong Fortinet experience, particularly FortiGate and FortiManager
• Experience with firewalling at scale, NAT, IPS, web and antivirus filtering, IPSec site-to-site VPNs and SSL VPNs
• Understanding of internet connectivity including FTTC, FTTP and leased lines, together with transit and peering concepts
• Strong analytical and troubleshooting skills
• Excellent customer-facing communication skills
• Full UK driving licence
• CCNP or equivalent
• Fortinet NSE/FCP certification
• HPE Aruba, Cisco Meraki or Ubiquiti UniFi
• Sophos or Cisco ASA/Firepower
• Windows Server knowledge
• Hyper-V or VMware
• Experience working within CNI, datacentre or other high-availability environments

Responsibilities:

• Take ownership of network installation and migration projects from start to finish
• Work closely with the Network Manager, Account Managers and customers to deliver projects successfully
• Maintain and develop the ISP and datacentre network, including core routing, peering, transit and edge connectivity
• Configure, manage and troubleshoot multi-customer firewall environments using FortiGate, FortiManager and Sophos XG
• Configure and support Cisco Nexus datacentre and ASR edge/service-provider platforms
• Configure and troubleshoot BGP, including peering and route policies
• Maintain and develop network monitoring and alerting systems
• Provide technical support across customer and internal network environments
• Participate in the 24/7 out-of-hours on-call rota, with a separate on-call allowance and paid callout payments
• Attend customer sites and datacentres for installations, migrations and technical support when required

Technologies:

• Aruba
• Cisco
• Firewall
• FortiGate
• Hyper-V
• Support
• NAT
• Network
• Nexus
• VMware
• Web
• Windows

More:

We are an established UK Managed Service Provider (MSP) operating our own ISP and datacentre infrastructure, delivering complex managed network services to enterprise and Critical National Infrastructure (CNI) customers. This is a hands-on senior technical role based in Basildon, Essex on a hybrid basis, with occasional customer site and data centre visits. You will join an experienced Network and ISP Engineering team and work on technically varied infrastructure across Cisco and Fortinet technologies, with strong service-provider routing built around BGP. We offer a salary of up to £65,000 depending on experience, plus a separate on-call allowance and paid callout payments. We are committed to inclusive recruitment and welcome applications from people of all backgrounds.

last updated 34 week of 2026