About the Role:We are looking for a skilled IT Infrastructure Administrator to join our team. In this role, you will manage and maintain our IT infrastructure, ensuring reliable, secure, and efficient operation of our systems and services.Key Responsibilities:Operating Systems and Server Services: Administration of Windows Server services, including: Active Directory (DC), DNS, DHCP, PKI, WSUS, Print Server, File Server, GPO Monitoring, updates, diagnostics, and troubleshooting Basic administration of Linux servers Identity and Cloud Services Management: Manage on-premises Active Directory Manage hybrid environments using Entra ID (formerly Azure AD) and AAD Connect integration Administration of Microsoft 365 services, including: Exchange Online SharePoint Online Microsoft Teams Virtualization and Infrastructure: Manage VMware vSphere ESXi clusters and vSAN environments Basic administration of Citrix environments Network management (LAN, WAN, SD-WAN, VPN, Wi-Fi) – configuration and maintenance of network devices Firewall monitoring, maintenance, and security rule management Backup systems administration and monitoring Administration of VoIP virtual PBX systems Monitoring, Automation, and Documentation: Experience with Zabbix monitoring system Task automation using PowerShell scripting Participation in creating, implementing, and maintaining IT documentation and internal procedures Preferred / Nice-to-Have Skills: Advanced Citrix farm management Microsoft Azure cloud management, including RBAC, VNet, storage, cost and security policies Requirements: Proven experience in IT infrastructure administration Strong troubleshooting and problem-solving skills Ability to work independently and in a team environment Good communication skills in English