Salary: £42,000 - 46,000 per year Requirements: We require CCNA or an equivalent certification. CCNP is highly desirable. We need proven experience supporting enterprise-scale network environments. We require a strong background in firewalls and VPNs, including Cisco ASA and Check Point. We need experience with routing protocols and network design principles. We require experience with WAN technologies and monitoring. We need experience with campus LAN and Wi-Fi networks. We require knowledge of QoS in WAN and LAN environments. Experience with SD-WAN is required, with Arista preferred. Knowledge of Cisco wireless networks is required; Juniper exposure is beneficial. We need excellent network troubleshooting and diagnostic skills. Experience using tools for traffic analysis, performance monitoring, and capacity planning is required. We need strong problem-solving skills and attention to detail. We require the ability to work independently and take initiative. We need someone comfortable working in a fast-paced, collaborative team environment. We require a quick learner who can apply new knowledge effectively. Excellent communication and stakeholder engagement skills are required. Responsibilities: We maintain and support WAN, LAN, and wireless LAN connectivity across multiple locations. We deploy, configure, and support edge routers and security firewalls. We contribute to the design and implementation of network solutions. We monitor network health, performance, and overall environment stability. We perform fault finding, troubleshooting, and root cause analysis. We support the development of network standards, configurations, and best practices. We assist with hardware lifecycle planning and replacement strategies. We produce and maintain clear technical documentation and procedures. We work closely with vendors, suppliers, and internal stakeholders. We provide on-site support and installations when required. We ensure adherence to organisational policies and security standards. Technologies: Cisco Hardware Support LAN Network Security WLAN More: We are a well-established and dynamic organisation based in Lewes, East Sussex, offering a full-time, permanent Senior Network Engineer opportunity within our internal IT team. This hands-on role reports to the Network Team Leader and gives you the chance to support and evolve a large-scale enterprise network estate across WAN, LAN, WLAN, and network security. We offer a competitive salary of £42,000 to £46,000 per annum for a 37-hour working week, along with great benefits, a stable long-term career opportunity, and the chance to join a skilled and collaborative team working with emerging technologies such as SD-WAN and next-generation wireless. last updated 22 week of 2026