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# Senior Network Engineer - Belfast - £60,000

- **Company:** I.T. Alliance N.I. Ltd
- **Location:** Belfast, UK (Remote available)
- **Experience:** Expert
- **Salary:** £60,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Word, Microsoft Excel, Wireless LAN, Cloud Computing Security, Data Centers, Internetworking, Multi-protocol Systems, Local Area Networks, Microsoft Visio, Cisco Nexus Switches, Zero Trust Network Access, Wide Area Networks, Wi-Fi Technology, Computer Networking Systems, Firewalls (Computer Science), Information Technology, Fortinet, Cisco
- **Published:** October 23, 2026
- **Apply:** https://www.careerboard.com/gb/en/find-jobs-in-United-Kingdom/-1C4A78EE18D1FDA02C/

## About the Role

Prospective candidates must have substantial experience across Cisco LAN, WAN, WLAN, SDA, SNA, ISE, DNAC and ACI technologies, together with knowledge and demonstrable support experience across Fortinet FortiGate, FortiSwitch, FortiWireless and FortiSASE., * Third level degreee in Computer Science, IT or other area relevant to the role (Significant experience along with relevant professional certification like CCNP may also suffice)

 * Demonstrable expertise or certification in Cisco networking (CCNP level or equivalent practical experience).
 * At least four years' experience supporting enterprise or government customers in commercial support or managed service environments.
 * Practical Cisco security experience and/or relevant Cisco security accreditation.
 * Practical Fortinet experience and/or Fortinet certification (FCA, FCP, FCCS or FCX).
 * Experience supporting WAN technologies, including MPLS, Internet connectivity, L2VPNs and related access services.
 * Strong knowledge of cyber security technologies including Firewalls, IPS, UTM, SASE, ZTNA and cloud security solutions.
 * Proven troubleshooting skills across enterprise LAN, Wi-Fi and data centre networking environments, including Cisco ACI.
 * Strong understanding of incident, problem and change management, including root cause analysis and controlled implementation.
 * Ability to analyse monitoring alerts, logs and performance data and translate findings into effective technical actions.
 * Experience producing and maintaining high-quality operational documentation using tools such as Excel, Visio and Word.
 * Excellent communication, stakeholder management and prioritisation skills, with willingness to participate in a 24x7 on-call support rota and maintain professional certifications.

IMPORTANT!?All applicants must have UK right to work status as our client cannot provide any kind of Visa or Work Permit sponsorship at present.

## Description

The Senior Network Engineer will provide senior-level operational support and business-as-usual (BAU) service ownership for network and security solutions deployed across the assigned customer base. Acting as a technical escalation point and subject matter expert, the role will support strong customer outcomes, continual service improvement and effective knowledge transfer across the Operations Team., * Provide senior-level operational support for enterprise network and security services, acting as a technical escalation point for complex issues.

 * Support and maintain Cisco networking environments (LAN, WAN, WLAN, SDA, ACI, ISE, DNAC, SNA) and Fortinet security platforms.
 * Own incident resolution activities, ensuring timely restoration of services and effective stakeholder communication.
 * Lead technical troubleshooting, root cause analysis and implementation of corrective and preventative actions.
 * Plan, assess, implement and validate changes in accordance with established change management procedures.
 * Perform maintenance, patching, upgrades and life cycle management to ensure secure and reliable services.
 * Proactively monitor network performance, capacity, availability and security, taking action to prevent service disruption.
 * Maintain accurate operational documentation, configurations, procedures and knowledge-base content.
 * Contribute to service reviews by identifying trends, risks and service improvement opportunities.
 * Act as a trusted technical advisor to customers, understanding their environments and operational priorities.
 * Collaborate with internal teams, vendors, carriers and partners to resolve faults and maintain service continuity.
 * Participate in an on-call rota, support service improvements, and mentor colleagues to enhance operational capability.