Senior Windows Engineer

OpticoreIT; Greater London; Remote; GBP 83,000 - 138,000; Full time

Job summary

Opticore IT is seeking a Senior Windows Engineer to own the Windows 11 client behavior during a connectivity review for a large global financial organisation. You will work with the Network Lead focusing on roaming, reconnect, and resume, and evaluate how GPO, Intune and SCCM delivered configuration affects connectivity, including the move from GlobalProtect to the Netskope client.

This contract is initially two months Inside IR35, primarily remote with occasional travel to London.

Qualifications

• Windows 11 network stack expertise (NLA/NCSI, WFP, proxy handling).
• Experience diagnosing and resolving client connectivity issues at scale.
• Strong analysis of GPO, Intune and SCCM configurations.
• Experience collecting and analyzing traces from Windows clients.

Responsibilities

• Review Microsoft Wi-Fi findings and ensure fixes are deployed estate-wide.
• Assess Windows 11 network stack behavior on network changes and proxies.
• Review policy settings across GPO, Intune and SCCM related to networking.
• Capture and analyse client traces from devices across regions.
• Test hypotheses and recommend client-side fixes with the network lead.
• Contribute to the written report and readout.

Skills

Windows 11 networking

Network tracing

GPO/Intune/SCCM policy analysis

VPN/SSE client testing

Tools

pktmon

netsh trace

Event Viewer

PowerShell

Wireshark

Job description

Opticore IT is a specialist Network Engineer and Project Management consultancy offering a wide variety of opportunities to work within fast-paced,challenging environments across our client base spanning multiple sectors including Finance, Broadcast Media, Telecommunications and more.

Opticore IT are currently searching for a Senior Windows Engineerto own the Windows 11 client side of an independent review of a long running connectivity issue with a large global financial organisation.

You will alongside the Senior Network Engineer who is leading the engagement, focusing on how the Windows 11 client behaves on network change (roaming, reconnect, resume) and how GPO, Intune and SCCM delivered configuration affects connectivity, including the move from GlobalProtect to the Netskope client.

This will be an initial two month contract (Inside IR35) with a strong prospect of extension, the position will be remote with ad-hoc travel to London for meetings.

What you'll be doing:

• Review Microsoft’s Wi-Fi findings and fix, and confirm the fix is deployed consistently across the estate.

• Assess Windows 11 network stack behaviour on network change, covering NLA/NCSI, WinHTTP/WinINET proxy handling and PAC caching, the DNS client and the Windows Filtering Platform.

• Review GPO, Intune and SCCM settings affecting networking, proxy, Wi-Fi, power management and drivers.

• Capture and analyse client traces (pktmon, netsh trace, event logs) from German devices and a control country.

• Test client-side hypotheses jointly with the network lead and recommend client fixes.

• Advise on Netskope client behaviour on Windows 11.

• Contribute to the written report and readout.

What you'llbring:

• Windows 11 network stack: NLA/NCSI, Windows Filtering Platform, WinHTTP/WinINET proxy

• Windows client diagnostics: pktmon, netsh trace, Event Viewer, PowerShell, Wireshark

• GPO, Intune and SCCM: policy conflict analysis in a large managed estate.

• Wi-Fi client troubleshooting: drivers, firmware, power management, 802.1X supplicant.

• VPN/SSE client behaviour on Windows: GlobalProtect and Netskope client

Diversity:

At Opticore IT we embrace diversity and are committed to equal opportunities. We actively recruit for an inclusive and diverse workforce and as such, want to ensure we do everything we can to support your application.

We want you to feel empowered to let us know if you require any adjustments to be made with your application or interview process so please speak to our recruitment team.