Senior Enterprise WLAN Engineer – Wi‑Fi, 5G & SD‑WAN

Test Triangle Limited; Warwick; On-site; GBP 70,000 - 95,000; Full time

Job summary

Test Triangle Limited in the United Kingdom is seeking an Experienced Specialist Wireless Network Engineer to modernize national network infrastructure, replace end-of-life hardware, and deploy enhanced Wi‑Fi with SD-WAN overlays. You will conduct extensive wireless surveys and design work with Ekahau tools, travelling to Grid sites across the UK.

The role demands expertise in Cisco/Aruba WLAN, RF fundamentals, 802.11 standards, and policy engines such as ISE/ClearPass.

Qualifications

• Strong hands-on experience with enterprise WLAN technologies (Cisco, Aruba).
• Deep understanding of RF fundamentals (channel planning, power, interference mitigation).
• Knowledge of 802.11 standards including Wi‑Fi 5/6/6E/7.
• Experience with enterprise controllers, cloud-managed Wi-Fi platforms and policy engines.
• Proficiency with wireless survey tools (Ekahau, Hamina etc.).
• Experience with Cradlepoint, or similar 5G cellular-enabled networking platforms.
• Experience supporting large-scale Wi-Fi environments in complex organisations.
• Experience with ISE and Aruba ClearPass for 802.1X, RADIUS, profiling and role-based access.
• Ability to interpret network analytics, performance data and incident trends.
• Excellent communication skills and comfort engaging with both technical and non-technical stakeholders.
• Able to travel ad-hoc to National Grid locations for onsite pre and post deployment Wi-Fi surveys

Responsibilities

• Design, deploy and optimise enterprise wireless LAN solutions across office and industrial environments.
• Conduct wireless surveys (predictive & on-site), RF analysis and coverage optimisation.
• Lead troubleshooting for complex Wi-Fi issues, including authentication, interference and performance degradation.
• Create and update Low-Level Designs (LLDs) for Wi-Fi, NAC and related network services.
• Produce accurate Bill of Materials (BoM) for new deployments, refresh programmes and upgrade initiatives.
• Support Wi-Fi lifecycle management including hardware upgrades, software updates and capacity planning.
• Work with stakeholders across IT, operations and platform teams to define requirements and deliver scalable solutions.
• Contribute to standards, best practices, design documentation and knowledge sharing within the network engineering chapter.

Skills

WLAN technologies

Cisco

Aruba

RF fundamentals

802.11 standards

Enterprise WiFi platforms

Ekahau surveys

5G networking platforms

ISE / Aruba ClearPass

Network analytics

Communication skills

Travel readiness

Tools

Ekahau

Cradlepoint

Aruba ClearPass

Job description

Test Triangle Limited in the United Kingdom is seeking an Experienced Specialist Wireless Network Engineer to modernize national network infrastructure, replace end-of-life hardware, and deploy enhanced Wi‑Fi with SD-WAN overlays. You will conduct extensive wireless surveys and design work with Ekahau tools, travelling to Grid sites across the UK.

The role demands expertise in Cisco/Aruba WLAN, RF fundamentals, 802.11 standards, and policy engines such as ISE/ClearPass.