Senior Network Engineer (3rd Line) - Consultancy

Are you looking for an exciting new opportunity?

Join an award-winning IT services and solutions provider with decades of expertise spanning Cloud, Cybersecurity, IT Collaboration, Data Centre Services, and Sustainability. Holding top-tier partnerships with leading global technology vendors, the organization delivers integrated managed services and modern workplace infrastructure designed to optimize performance, security, and operational resilience for enterprise clients.

The company is seeking a Senior Network Engineer to serve as the dedicated Fortinet specialist within its managed services operation in Liverpool. Leading complex fault investigations across firewalls, routing, and WAN infrastructure, the successful candidate will restore critical customer services rapidly while driving root-cause analysis and architectural improvements to prevent repeat incidents.

If you would like to learn more about this opportunity, feel free to reach out and apply today!

Responsibilities:

• Own complex 3rd line network escalations from diagnosis through to service restoration.
• Lead troubleshooting across FortiGate firewalls, VPNs, routing and SD-WAN.
• Use FortiManager and FortiAnalyzer to investigate configuration changes, logs and traffic behaviour.
• Plan and implement complex firewall changes and upgrades, including validation and rollback.
• Investigate recurring faults and use your findings to improve configurations and support procedures.
• Guide 2nd line engineers through complex escalations and support the Liverpool data centre when required.
• FortiGate, FortiManager and FortiAnalyzer
• SD-WAN policy, path selection and failover
• Enterprise firewalls and site-to-site VPNs
• BGP, OSPF, VLANs and spanning tree
• Cisco and Extreme Networks across parts of the customer estate

Skills/Must Have:

• Deep FortiGate experience, including complex troubleshooting and configuration changes in production.
• Practical experience with FortiManager and FortiAnalyzer in live environments.
• SD-WAN experience with any vendor, including diagnosing path selection or failover issues.
• Strong routing and switching skills, including troubleshooting BGP or OSPF in production.
• Experience leading technical escalations and making decisions independently during live incidents.

Benefits:

• Hybrid working with two days from home per week
• On-call rota of one week in seven
• £450 retainer per on-call week, plus hourly callout pay with a minimum of one hour per incident

Salary:

• Up to £75,000 basic salary