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# Senior Network Engineer (Fortinet | ClearPass | Infoblox)

- **Company:** Hays plc
- **Location:** Harwell, UK (Remote available)
- **Experience:** Expert
- **Salary:** £75,000.0
- **Contract:** Temporary contract
- **Skills:** Application Firewall, Complex Networks, Dynamic Host Configuration Protocol, Domain Name System (DNS), IPv4, IPv6, IP Address Management, Network Security, Network Layer, Network Monitoring, Routing, Network Service, Wide Area Networks, Wireless Networks, Network Access Control, Firewalls (Computer Science), Fortinet, Service Stack
- **Published:** October 21, 2026
- **Apply:** https://www.hiredonline.co.uk/jobs/225633860-senior-network-engineer-fortinet-clearpass-infoblox/hays-technology

## About the Role

You'll be an experienced Senior Network Engineer with a strong background supporting enterprise-scale environments and a proven track record working across complex multi-site networks. Experience across the following technologies will be highly desirable:

 * Fortinet Firewalls
 * Extreme XIQ Wireless
 * ClearPass or equivalent NAC solutions
 * Infoblox IPAM
 * LAN/WAN Networking
 * Layer 2 & Layer 3 Switching
 * DNS & DHCP
 * IPv4 & IPv6
 * Network Security & Access Control

You'll be comfortable working within complex environments, managing multiple priorities and providing technical leadership when required.Strong troubleshooting ability, clear communication skills and a methodical approach to problem solving will be essential.Candidates who have operated in large corporate, public sector, critical infrastructure, engineering or highly regulated environments are likely to thrive in this role.

What you'll get in return

You'll join a highly capable technical team working within a large-scale enterprise environment where networking remains a critical operational function.This engagement offers a strong mix of technical challenge, project involvement and operational responsibility, making it well suited to experienced contractors who enjoy working across a broad range of technologies rather than being siloed into a single area.You'll gain exposure to enterprise-grade technologies, work alongside skilled infrastructure professionals and have the opportunity to make a genuine impact on the stability, security and performance of a complex network estate.

## Description

This is a hands-on Senior Network Engineer position supporting a sizeable multi-site network estate across routing, switching, wireless, firewalls, network access control and core infrastructure services.You'll take ownership of technical issues, support network improvement initiatives and help maintain a secure, highly available enterprise environment that supports thousands of users and critical operational services. Working alongside infrastructure and security specialists, you'll be responsible for troubleshooting complex incidents, supporting project delivery, implementing changes and contributing to the ongoing development of network services.This is an environment where you'll be trusted to operate independently, solve challenging technical problems and provide senior-level engineering expertise across a broad technology stack.
Key areas of responsibility include:

 * Enterprise firewall administration and security policy management
 * Wireless networking and access control platforms
 * Routing, switching and network performance optimisation
 * DNS, DHCP and IP Address Management
 * Network monitoring, troubleshooting and incident resolution
 * Service improvements, upgrades and project delivery
 * Supporting network security and resilience initiatives
 * Collaborating with infrastructure, security and project teams to ensure network services continue to evolve alongside business requirements