Senior Network Engineer - Belfast - Contract

  • I.T. Alliance N.I. Ltd
  • City, Belfast
  • 07/08/2026
Contractor Information Technology Telecommunications Cisco

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.