My client based in Drogheda are currently on the lookout for an Infrastructure Systems Administrator to manage and support our on-premises and cloud-based IT infrastructure. This role is responsible for maintaining servers, endpoints, and network components, administering user access and security, and ensuring system reliability across a diverse technology stack. The ideal candidate will bring strong troubleshooting skills, hands-on experience with both hardware and software systems, and the ability to provide end-to-end support in a dynamic environment.Key ResponsibilitiesTroubleshoot and resolve hardware, software, and network issues, including diagnosing outages and system performance problems.Configure, install, and manage servers, laptops, desktops, mobile devices, printers, and scanners.Administer Active Directory, Group Policies, OUs, and Azure AD/Entra ID for user/group management and identity access.Manage Microsoft 365 services (Exchange, SharePoint, Teams, OneDrive) and support cloud-based business applications such as Oracle NetSuite.Perform system backups, patch management, and implement endpoint protection using Microsoft Defender, MDM, and ATP.Support network fundamentals (TCP/IP, DNS, DHCP, VLANs, WAN, Fibre, Wi-Fi standards) and assist with structured cabling and connectivity issues.Monitor system performance using Microsoft PurView, InTune, SNMP, syslog, and log analysis tools.Provide desktop and software support, including imaging devices, supporting engineering applications (SolidWorks, ZW CAD), ERP (NetSuite), payroll software, and Microsoft Office suite.Manage and support remote access tools, ticketing systems, and IT documentation.Assist in basic security administration, including certificate generation, installation, and revocation.Collaborate with stakeholders to ensure IT systems meet business needs, while maintaining compliance with security and governance standards.Required Skills & Experience3+ years' experience in systems or infrastructure administration.Strong knowledge of Windows Server (2022), Windows 11, Active Directory, Azure AD/Entra ID, and endpoint security solutions.Experience with Microsoft 365 administration and cloud services.Hands-on knowledge of hardware platforms (HP ProLiant servers, Dell/Lenovo laptops, HP workstations, printers, mobile devices).Familiarity with basic networking concepts (TCP/IP, DNS, DHCP, VLANs, Wi-Fi, fibre connectivity).Strong troubleshooting, diagnostic, and problem-solving skills.Excellent communication and stakeholder engagement abilities.Desirable SkillsExperience with macOS and iOS devices in mixed environments.Exposure to scripting/automation with PowerShell or Python.Familiarity with engineering/CAD applications (SolidWorks, ZW CAD).Understanding of ITIL processes and documentation standards.Monitoring and reporting experience across on-premises and cloud environment