WINTEL Systems Administrator (Platform Manager)

Experis; City Of London; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading IT services provider seeks a DV Cleared WINTEL Systems Administrator to manage a Windows-based Live Service Network in London. You will provide Level 3 support, maintain network security, and adhere to management policies. Ideal candidates must possess strong Windows systems knowledge and experience in security patching. The role demands excellent teamwork and problem-solving skills. Join us to enhance a vital network supporting diverse users in a fast-paced environment.

Qualifications

• Must have experience in supporting Windows systems.
• Experience with security patching is essential.
• Strong understanding of handling sensitive documents.

Responsibilities

• Maintain a Windows-based Live Service Network.
• Provide Level 3 support for complex issues.
• Ensure network security and document maintenance activities.

Skills

Windows systems knowledge

Network fundamentals

Troubleshooting

Team collaboration

Proactive problem-solving

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

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.