Network Engineer (3rd Line)

Role: 3rd Line Network Engineer

Location: Solihull (Fully On-Site)

Salary: £40,000 - £45,000

Network IT are working with a growing and highly regarded managed services provider to recruit a 3rd Line Network Engineer. This is a senior technical role supporting complex, enterprise and ISP-level networks across a diverse customer base covering numerous sectors and industries with their own bespoke requirements.

This is an excellent opportunity for an experienced engineer who thrives in high-impact environments, enjoys solving complex issues, and wants to work across a broad, modern networking stack.

This role will require you to work Monday to Friday out of our clients Solihull office, please ensure you can accommodate to these circumstances before applying.

Role Overview

As a 3rd Line Network Engineer, you will provide advanced technical support and own escalated issues across end-to-end network environments. You will be responsible for diagnosing and resolving complex connectivity problems, ensuring the stability, performance, and security of mission-critical systems.

You will work across the full network stack — from ISP backbone and WAN connectivity through to customer edge, firewalls, LAN switching, and wireless infrastructure — playing a key role in maintaining high service standards and customer satisfaction.

This role requires a highly analytical and detail-oriented professional who can manage multiple priorities, communicate clearly with stakeholders, and deliver under pressure.

Key Responsibilities

Provide 3rd line support across complex enterprise and ISP-level network environments

Own and resolve escalated network incidents, performing deep technical diagnostics

Support full-stack networking including WAN, LAN, routing, switching, firewalls, wireless, and SD-WAN

Troubleshoot issues across core backbone, circuits, customer edge, and on-site infrastructure

Work across multi-vendor environments including Fortinet, Cisco Meraki, and Palo Alto

Ensure high levels of network performance, availability, and reliability

Maintain detailed documentation and update ITSM/ticketing systems (e.g. ServiceNow)

Collaborate with internal teams and support knowledge sharing across the wider technical function

Support customers in mission-critical environments, ensuring professionalism and accuracy at all times

Essential Skills & Experience

Proven experience in a 3rd Line Network Engineer or senior network support role

Experience supporting large-scale, high-availability network environments (public sector, healthcare, education, or enterprise)

Strong technical knowledge of:

Routing protocols (BGP, TCP/IP stack)

WAN/LAN networking

Firewalls and network security

Wireless networking and SD-WAN technologies

Hands-on experience with FortiGate, Cisco Meraki, and Palo Alto

Experience using ITSM platforms (ServiceNow desirable)

CCNA certification (essential)

CCNP certification (highly desirable)