WINTEL Systems Administrator (Platform Manager)

Experis; Greater London; On-site; GBP 45,000 - 55,000; Part time

Job summary

A reputable organisation is seeking a DV Cleared WINTEL Systems Administrator (Platform Manager) in London. The successful candidate will support a critical Windows-based Live Service Network, provide Level 3 troubleshooting, and help maintain network security. Ideal applicants are strong team players with excellent problem-solving skills and a proactive approach. This on-site contractor role includes responsibilities for documenting processes and providing technical support in a fast-paced environment, making a real impact on service delivery.

Qualifications

• Must handle sensitive information with care.
• Experience with monthly security patching.
• Experience in maintaining network security protocols.

Responsibilities

• Maintain and support a Windows-based Live Service Network.
• Provide Level 3 support for resolving issues.
• Document procedures for clarity and compliance.
• Provide technical on-call support on a rotational basis.

Skills

Strong knowledge of Windows systems

Network fundamentals

PKI knowledge

Ability to work under pressure

Excellent team player

Job description

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 elevate incidents when needed.
• Excellent team player with a proactive approach to problem-solving.

Desired skills and experience:

• Understanding of handling sensitive information and maintaining a document library.
• Experience running environment checks and maintaining network security protocols.

Working pattern:

• Monday to Friday, with out-of-hours support on a 1 week in 3 basis.

Ideal candidates will be:

• Passionate about supporting and improving network environments.
• Confident in troubleshooting and providing technical support remotely and on-site.
• Committed to working collaboratively in a fast-paced environment.

If you're ready to make a difference and work on a vital network supporting diverse end users, this is your chance to shape your world and the way the world works. Apply now to join a dedicated team delivering impactful solutions.