Senior System Administrator

About the role

The Senior Systems Administrator will strengthen internal technology capability across corporate and engineering environments. This hands‑on role supports day‑to‑day operations while shaping future infrastructure and security practices.

Key responsibilities

• Administer and maintain Linux‑based servers, services and on‑premise/cloud infrastructure.
• Manage Microsoft 365 suite including Entra ID, Exchange Online, SharePoint, Teams, Intune and Defender.
• Handle user identities, permissions, endpoint administration and security controls.
• Troubleshoot systems, applications, infrastructure and end‑user issues.
• Oversee backup, recovery, patching, monitoring and lifecycle management.
• Coordinate IT projects and support activities with external MSPs and vendors.
• Maintain documentation, procedures and configuration records.

Required profile

• Strong hands‑on experience administering Linux environments.
• Proven experience with Microsoft 365 and Entra ID administration.
• Background supporting both on‑premises and cloud infrastructure.

Required skills

• Linux server administration
• Microsoft 365 (Exchange Online, SharePoint, Teams, Intune, Defender)
• Entra ID / Azure AD
• Backup, recovery, patch management
• Monitoring and automation tools
• IT documentation and asset management