DV Cleared WINTEL Systems Administrator (Platform Manager) Location: London (On-Site) Type: Contractor Start Date: Jan 2026 End Date: TBC Must be eligible and willing to go through high level security clearance Our client, a reputable organisation supporting local government, is hiring for a dedicated WINTEL Systems Administrator (Platform Manager) to join a busy, professional team. This is an exciting opportunity to contribute to a critical live service network, supporting a range of hosted applications and ensuring seamless operations. What you''ll be doing:. Maintain and support a Windows-based Live Service Network, including hosted applications.. Provide Level 3 support and troubleshooting to resolve complex issues efficiently.. Follow established configuration and change management policies to ensure smooth updates and modifications.. Assist in maintaining network security across departments.. Document processes, procedures, and work instructions to ensure clarity and compliance.. Keep accurate records of network components, maintenance activities, and inventory using appropriate databases.. Offer technical on-call support on a rotational basis (out of hours, 1 week in 3). What you''ll bring:. Strong knowledge of Windows systems and network fundamentals.. Experience running and maintaining a monthly security patching process.. PKI knowledge to support secure communications.. Ability to work well under pressure, prioritise critical tasks, and escalate incidents when nee