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Senior Network Engineer - Belfast - Contract

I.T. Alliance N.I. LtdCity, Belfast🇬🇧United KingdomPosted 7 Aug 2026

Why This Role Stands Out

This hybrid contract role offers a competitive daily rate for experienced Senior Network Engineers to contribute to critical infrastructure projects within the telecommunications sector. You'll leverage your expertise in Fortinet and Cisco technologies, gaining valuable experience in a dynamic environment, and will thrive if you enjoy hands-on problem-solving and project delivery. Apply today to secure this exciting opportunity in Belfast!

Quick Overview

Work Type
Hybrid
Schedule
Temporary/Casual
Level
Mid Senior

Job Description

Senior Network Engineer

3 Month Contract

Location: Belfast City Centre
Working Arrangement: Hybrid - Must be 3 days onsite/2 days remote
Contract: 3 months

Day Rate - £400 - £450 DOE
Sector: Telecommunications/Technology Services
Start: Immediate/ASAP

Working Rights: Candidates must have Full time working rights in the UK. Sponsorship is not available.

The Role

We are seeking an experienced Senior Network Engineer to join a technical infrastructure team on an initial 3-month contract, supporting a busy operational environment in Belfast.

The successful candidate will provide hands-on support across BAU network operations, while also assisting with ongoing network infrastructure and project delivery. This is an excellent opportunity for a technically strong Network Engineer with proven experience across both Fortinet and Cisco technologies.

Key Responsibilities

  • Provide senior-level support across enterprise network infrastructure and BAU operations.
  • Configure, troubleshoot and maintain Fortinet network technologies, with particular focus on routing, switching and wireless.
  • Support and troubleshoot Cisco routing and switching environments.
  • Assist with Cisco Software-Defined Access (SDA) and Cisco Identity Services Engine (ISE).
  • Support enterprise wireless infrastructure across Fortinet and Cisco environments.
  • Investigate and resolve complex network incidents and performance issues.
  • Assist with network changes, upgrades, migrations and project delivery.
  • Work closely with internal technical teams to ensure network availability, performance and security.
  • Produce and maintain technical documentation relating to network infrastructure and changes.
  • Provide hands-on technical expertise across both operational support and project activities.

Key Skills & Experience

Cisco

  • Strong commercial experience as a Senior Network Engineer or similar.
  • Extensive hands-on experience with Fortinet technologies.
  • Strong knowledge of Fortinet routing, switching and wireless.
  • Fortinet certification at NSE 4-5 level or equivalent hands-on experience.
  • Strong Cisco networking experience.
  • Cisco certification at CCNP/CCIE level or equivalent practical experience.
  • Experience with Cisco routing and switching.
  • Experience with Cisco SDA.
  • Experience with Cisco ISE.
  • Strong enterprise wireless networking experience.
  • Excellent troubleshooting and problem-solving skills.
  • Comfortable working across both BAU support and project delivery environments.

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