Systems Administrator – Microsoft Infrastructure

About the role

We are looking for a Systems Administrator to manage and optimise Arcera’s Microsoft‑based IT infrastructure across on‑premises, cloud and hybrid environments. The role ensures reliability, security and performance of critical systems while supporting business operations.

Key responsibilities

• Install, configure, maintain and troubleshoot Windows Server (2019/2022/2025) and related services such as DNS, DHCP, File/Print and IIS.
• Administer on‑premises and hybrid Active Directory, Entra ID/Azure AD, including user, group and GPO management.
• Manage Microsoft 365 services – Exchange Online, Teams, SharePoint Online, OneDrive and Intune for device management.
• Perform system monitoring, performance tuning, patching and updates.
• Respond to incidents, troubleshoot hardware/software issues and conduct root‑cause analysis.
• Automate routine tasks with PowerShell scripting and support configuration management.
• Ensure security compliance by applying patches and remediating vulnerabilities.
• Provide technical support, documentation and training to end‑users or junior staff.
• Maintain inventory, asset documentation and generate system status reports.

Required profile

• Minimum 4 years of experience in IT systems administration with a focus on Microsoft technologies.
• Strong written and spoken English.
• Experience in a GxP environment is a plus.
• Relevant Microsoft certifications are advantageous.

Required skills

• Windows Server (2019/2022/2025) and desktop OS (Windows 10/11).
• Active Directory, Group Policy, DNS, DHCP.
• Microsoft 365 administration – Exchange Online, Teams, SharePoint, Intune.
• PowerShell scripting for automation.
• VMware administration.
• Basic networking (TCP/IP, VLANs, firewalls).
• Security concepts – patching, MFA, Zero Trust, compliance.