Job Description My client, a well-established public sector organisation operating within a multi-site enterprise (Ballymena/Coleraine/Newtonabbey/Magherafelt) environment, is seeking a Senior Network Engineer to join their IT Systems function. This is a key role responsible for the ongoing development, optimisation and support of the organisation's network and communications infrastructure. This position offers the opportunity to contribute to network architecture design while maintaining and enhancing business-critical infrastructure across multiple locations. * Competitive salary (commensurate with experience) * Generous annual leave entitlement * Employer pension contribution * Ongoing professional development and certification support * Clear progression opportunities within IT infrastructure You will be part of a forward-thinking IT team delivering secure, reliable and high-performing network services that support organisation-wide operations. The environment is technically varied and offers exposure to enterprise-level networking, security and communications technologies. The Role As a Senior Network Engineer, you will be responsible for the day-to-day management, monitoring and enhancement of network infrastructure, alongside supporting strategic upgrades and new technology implementations. You will: Manage and maintain LAN, WAN and wireless infrastructure Configure and support switching, routing, VLANs and remote access solutions (VPN) Administer firewalls, network access control and security policies Support Windows network services (DNS, DHCP etc.) Oversee telephony and unified communications systems Perform proactive monitoring, traffic analysis and capacity planning Lead on firmware upgrades, patching and infrastructure improvements Deliver network-related projects including installation, configuration and testing Maintain documentation, disaster recovery processes and asset inventories Support incident resolution within agreed SLAs Liaise with third-party suppliers and vendors Provide mentoring and technical guidance to junior team members The Person * Strong experience within a multi-site network environment * Advanced knowledge of Ethernet switching and routing protocols * Strong understanding of network security principles and firewall management * Experience supporting Cisco, HP or equivalent enterprise networking technologies * Solid knowledge of Microsoft network services * Experience diagnosing and resolving complex network faults * Strong understanding of low-level network protocols * Experience managing wireless infrastructure Qualifications (one of the below): * Relevant Level 4 qualification plus 3 years' networking experience * OR 7 years' relevant networking experience * OR Associate-level networking certification (e.g. CCNA or equivalent) plus 2 years' experience For further information on this role, or other IT Infrastructure opportunities, apply via the link or contact the consultant for a confidential discussion. Successful applicants may be required to complete pre-employment checks in line with organisational policy.