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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Network Engineer (Aruba ClearPass) - **Company:** Xalient - **Location:** UK (Remote available) - **Experience:** Expert - **Salary:** £66,917.0 - **Contract:** Temporary contract - **Skills:** IEEE 802.1X, Wireless LAN, Border Gateway Protocol, Enhanced Interior Gateway Routing Protocol, Hot Standby Router Protocol, Multi-protocol Systems, Routing, Open Shortest Path First (OSPF), Zero Trust Network Access, Virtual Local Area Networks, Virtual Router Redundancy Protocols, Wireless Networks, Network Access Control, Computer Network Technologies, TACACS+ Protocol, Cisco - **Published:** September 25, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5897294919 ## About the Role Extensive experience (typically 5+ years) in network engineering, with significant specialisation in HPE Aruba wired and wireless networking, at a senior/principal level. Deep, hands-on expertise with Aruba CX switching: VSX, core/aggregation/access design, and enterprise campus LAN architectures. Deep, hands-on expertise with Aruba Wireless (AOS8/AOS10) and Aruba Central, including RF design, capacity planning and multi-site management. Strong hands-on expertise with Aruba ClearPass Policy Manager: 802.1X, RADIUS/TACACS+, guest access, device onboarding/profiling (OnBoard/OnGuard) and dynamic segmentation. Ability to design and implement Zero Trust network access outcomes using NAC policy frameworks integrated with identity, MDM and security platforms. Excellent core routing and switching skills, including OSPF, BGP, EIGRP, STP/RSTP, VRRP/HSRP, VLANs and QoS. Strong multi-vendor experience, particularly Cisco routing and switching, sufficient to design and troubleshoot in mixed-vendor estates. Relevant HPE Aruba accreditations (e.g. Aruba Certified Switching Associate/Professional, Aruba Certified Mobility Associate/Professional, Aruba Certified ClearPass Professional, Aruba Certified Design Expert) and Cisco accreditations (e.g. CCNA, CCNP Enterprise, CCIE Enterprise Infrastructure) are required or highly desirable. ## Description Aruba LAN & WLAN Architecture Own the design and delivery of Aruba CX switching (core, aggregation and access) and Aruba Wireless (AOS8/AOS10, Aruba Central) solutions across complex, multi-site customer estates. Produce HLD/LLD documentation, RF and capacity planning, and validated reference designs for LAN and WLAN deployments. Network Access Control & ClearPass Design and implement Aruba ClearPass Policy Manager solutions, including 802.1X, guest access, device onboarding/profiling (OnBoard/OnGuard) and dynamic segmentation. Define NAC policy frameworks that integrate with identity, MDM and security platforms to support Zero Trust network access outcomes. Guide customers through NAC discovery, monitor mode and phased enforcement roll-outs, minimising business disruption. Routing & Core Networking Apply strong routing and switching expertise (OSPF, BGP, EIGRP, VRRP/HSRP, STP, MPLS) to design resilient, scalable core and campus networks. Ensure Aruba solutions integrate cleanly into customers' wider, often multi-vendor, routing environments, including Cisco estates. 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