Systems Administrator – IT Infrastructure & Cloud

About the role

We are seeking a Systems Administrator to join a well‑established IT function supporting a dynamic professional services organisation in Dublin city centre. You will be responsible for maintaining and enhancing core infrastructure, cloud platforms, networking, and security systems across the business.

Key responsibilities

• Administer Windows Server (2019+) environments on‑premise and in the cloud.
• Manage Active Directory, Azure AD, DNS, DHCP and Group Policy.
• Support Microsoft 365 services including Exchange Online, Intune, Teams, SharePoint and OneDrive.
• Maintain SQL Server platforms and related databases.
• Monitor infrastructure performance, perform upgrades, patching and lifecycle management.
• Deploy and configure endpoints using modern management tools.
• Provide escalation support and troubleshoot networking, VPN and firewall issues.
• Implement and maintain security controls, review alerts and assist with compliance activities.

Required profile

• Proven experience with Windows Server 2019+ and hybrid cloud environments.
• Strong knowledge of AD/Azure AD, DNS, DHCP and Group Policy.
• Hands‑on experience with Microsoft 365 administration.
• Experience supporting SQL Server and enterprise networking.
• Familiarity with cybersecurity tools, endpoint protection and patch management.
• Ability to manage competing priorities in a fast‑paced setting.

Required skills

• Windows Server 2019+
• Active Directory / Azure Active Directory
• DNS, DHCP, Group Policy
• Microsoft 365 (Exchange Online, Intune, Teams, SharePoint, OneDrive)
• SQL Server
• Networking protocols, VPN, firewall technologies
• Endpoint protection and patching solutions
• Enterprise switching, routing and wireless technologies