**Area of responsibility:** Server management (Windows, Linux, virtualized with VMware, Hyper\-V, etc.); Active Directory, DNS, DHCP, and GPO administration; System monitoring using tools such as Zabbix, PRTG, Nagios; Backup and disaster recovery (Veeam, Acronis, etc.); Storage and SAN/NAS management; Security updates and patches; Infrastructure documentation; Networking; Configuration and maintenance of switches, routers, and firewalls (Cisco, Mikrotik, Fortinet, etc.); VLAN, VPN, NAT, and QoS management; Network traffic and performance monitoring; Network security (IDS/IPS, segmentation, access control); User and branch connectivity support; Network capacity planning and expansion; Level 2 and level 3 support; Technical team training; Participation in IT projects (migrations, upgrades, new implementations); Interface with vendors and service providers. **Prerequisites:** Proven experience in corporate network administration. Knowledge of networking protocols (TCP/IP, DNS, DHCP, etc.) Experience with firewalls, routers, and switches (configuration and troubleshooting) Network monitoring and performance analysis Fundamentals of information security applied to infrastructure Solid knowledge of Windows Server (2016/2019/2022): Active Directory (AD) DNS, DHCP, GPOs File Server and NTFS permissions WSUS and update management Desirable: Certifications such as MCSA, MCSE, CompTIA Network\+ or similar; Experience with PowerShell for task automation; Knowledge of Azure AD / Microsoft 365 We value diversity and equality for all individuals, without distinction based on gender, religion, sexual orientation, disabilities, race, ethnicity, or other factors. Everyone is welcome in our selection process!