Lead Windows & Microsoft 365 Systems Admin (Hybrid)

Client Server; Greater London; Hybrid; GBP 30,000 - 50,000; Full time

Benefits offered by this job

25 days holiday

EAP with GP helpline

Cycle to work scheme

Gym and retail discounts

Training and career development

Job summary

Client Server is seeking a hands-on Lead Systems Administrator to own IT infrastructure for a charitable organisation in the London area, with WFH flexibility. You will manage the Microsoft 365 stack, security tooling, and device fleets, while leading a small team and coordinating with external suppliers to ensure reliable operations across offices and warehouses.

You will drive security, backups, disaster recovery, and incident response, enabling safe use of AI tools as adoption grows.

Qualifications

• Hands-on MS 365 stack including Entra ID, Intune, SharePoint and Teams.
• Experience managing Windows laptops and Android warehouse devices across multiple sites.
• Strong networking and troubleshooting with external suppliers.
• Experience with Microsoft security tools (Defender) and data protection practices.

Responsibilities

• Lead two System Administrators, balancing technical delivery (≈70%) with team development (≈30%).
• Own and secure the organisation's cloud-based Microsoft 365 environment and related devices.
• Manage access control, licensing, backups, DR, and incident response.
• Improve processes via automation and maintain technical documentation.
• Collaborate with Service Manager and stakeholders to align IT with charity goals.

Skills

Microsoft 365

Entra ID

Intune

SharePoint

Teams

Windows devices

Android devices

Networking

Defender

Disaster recovery

Leadership

Security certifications

Tools

Azure/Azure AD

Job description

Client Server is seeking a hands-on Lead Systems Administrator to own IT infrastructure for a charitable organisation in the London area, with WFH flexibility. You will manage the Microsoft 365 stack, security tooling, and device fleets, while leading a small team and coordinating with external suppliers to ensure reliable operations across offices and warehouses.

You will drive security, backups, disaster recovery, and incident response, enabling safe use of AI tools as adoption grows.