Senior Network Engineer

Senior Network Engineer

Lewes, East Sussex

Full-Time | Permanent

£42,000 – £46,000 per annum

37 hours per week (Monday–Friday)

The Opportunity

We are looking for a Senior Network Engineer to join a well-established and dynamic internal IT team based in Lewes. Reporting to the Network Team Leader, you will play a key role in supporting and evolving a large-scale enterprise network estate.

This is a hands-on role, offering the opportunity to work across WAN, LAN, WLAN, and network security, while contributing to both operational support and project-based network improvements.

Key Responsibilities

• Maintain and support WAN, LAN, and Wireless LAN connectivity across multiple locations


• Deploy, configure, and support edge routers and security firewalls


• Contribute to the design and implementation of network solutions


• Monitor network health, performance, and overall environment stability


• Perform fault finding, troubleshooting, and root cause analysis


• Support development of network standards, configurations, and best practices


• Assist with hardware lifecycle planning and replacement strategies


• Produce and maintain clear technical documentation and procedures


• Work closely with vendors, suppliers, and internal stakeholders


• Provide on-site support and installations when required


• Ensure adherence to organisational policies and security standards

• CCNA (or equivalent certification) – essential


• CCNP – highly desirable


• Proven experience supporting enterprise-scale network environments


• Strong background with:


• Firewalls & VPNs (Cisco ASA, Checkpoint)


• Routing protocols & network design principles


• WAN technologies and monitoring


• Campus LAN and Wi-Fi networks


• QoS in WAN/LAN environments


• Experience with SD-WAN (Arista preferred)


• Knowledge of Cisco wireless networks (Juniper exposure beneficial)


• Excellent network troubleshooting and diagnostic skills


• Experience using tools for traffic analysis, performance monitoring, and capacity planning

• Strong problem-solving mindset with attention to detail


• Ability to work independently and take initiative


• Comfortable working in a fast-paced, collaborative team environment


• Quick learner with the ability to apply new knowledge effectively


• Excellent communication and stakeholder engagement skills

• Join a forward-thinking organisation with a modernising network environment


• Be part of a skilled and collaborative network team


• Opportunities to work with emerging technologies including SD-WAN and next-gen wireless


• Competitive salary and stable, long-term career opportunity


• Great benefits included

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