> Markdown version of [/jobs/ext/2392085-senior-network-engineer](https://www.wearedevelopers.com/jobs/ext/2392085-senior-network-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Network Engineer - **Company:** Head Resourcing Ltd - **Location:** Harlow, UK - **Experience:** Expert - **Salary:** £123,500.0 - **Contract:** Temporary contract - **Skills:** IEEE 802.1X, Wireless LAN, Access Network, Application Programming Interfaces (APIs), User Authentication, Border Gateway Protocol, Catalyst (Software), Profiling, Dynamic Host Configuration Protocol, Domain Name System (DNS), Enhanced Interior Gateway Routing Protocol, Open Shortest Path First (OSPF), Open Systems Interconnection (OSI), Roaming, TCP/IP, Virtual Local Area Networks, Backup and Restore, Wireless Networks, Identity Services Engine, Software Troubleshooting, Firewalls (Computer Science), SC Clearance, Cisco Switches, Cisco - **Published:** August 14, 2026 - **Apply:** https://www.careerboard.com/pt/en/find-jobs-in-United-Kingdom/-4A3D9653DE63FF6F69/ ## About the Role We're supporting a leading defence organisation in the search for an experienced Cisco Network & Security Engineer contractor, with strong expertise across Cisco ISE, Catalyst 9800 Wireless, and Enterprise Networking. Candidates must have SC Clearance, and be able to work in a hybrid working arrangement up to 3 days in the office. Key Skills Required * Strong networking fundamentals (TCP/IP, OSI, VLANs, DHCP, DNS, BGP, OSPF, EIGRP) * Extensive experience with Cisco ISE * 802.1X, MAB, RADIUS, EAP-TLS/PEAP * Policy Sets, Authorisation Profiles, Endpoint Profiling * Guest & BYOD onboarding * HA, upgrades, backup & restore Strong hands-on experience with Cisco Catalyst 9800 WLCs * CAPWAP, roaming, mobility * WLANs, policy profiles and tags * RF optimisation, FlexConnect and high-density deployments Expertise integrating ISE and Wireless environments * Authentication troubleshooting (Client - AP - WLC - ISE) * Dynamic VLAN assignment, CoA, role-based access Strong troubleshooting, documentation and stakeholder management skills Desirable * Cisco DNA Center * Forcepoint Firewalls * Automation/API exposure (ISE or IOS-XE) * CCNP Enterprise, CCNP Security, Cisco ISE Specialist or CWNA/CWNP certifications Security Clearance Current SC Clearance or eligibility to obtain SC Clearance.h This is a fantastic opportunity to join a complex enterprise environment, working on critical network access, security, and wireless infrastructure projects. ## Related Videos - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Location Verification without GPS?](https://www.wearedevelopers.com/videos/1184-location-verification-without-gps) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Unleash the power of 5G in your code: transform your apps](https://www.wearedevelopers.com/videos/1567-unleash-the-power-of-5g-in-your-code-transform-your-apps) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) ## Related Articles - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Events like RSAC Get You CISOs. Developers Decide What Actually Gets Deployed.](https://www.wearedevelopers.com/magazine/693-events-like-rsac-get-you-cisos-developers-decide-what-actually-gets-deployed) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)