KONSTANTIN ANANIN

Administration of Windows Server 2016/2019/2022.

• Managed the installation, configuration, and administration of Windows Server 2016/2019/2022, ensuring stable operation of core IT infrastructure services such as Active Directory, DNS, DHCP, and file sharing.
• Administered Group Policy Objects (GPO) to enforce security policies, manage user environments, and streamline system configurations across the enterprise.
• Applied regular updates, security patches, and firmware upgrades in compliance with corporate cybersecurity protocols and industry best practices.

Administration of Linux-based Servers (Ubuntu Server).

• Deployed, configured, and administered Ubuntu-based servers to support internal IT services, including monitoring tools, and automation scripts.
• Developed and maintained automation scripts using Bash and Python to streamline routine administrative tasks, optimize system performance, and enhance operational workflows.
• Performed system hardening and applied security best practices to protect Linux servers from external and internal threats.

Network Infrastructure Management (Huawei and SNR Switches).

• Configured and maintained network infrastructure based on Huawei and SNR switches, including VLAN segmentation, trunk ports configuration, and link aggregation (LACP) to ensure optimized traffic flow and network security.
• Performed diagnostics and troubleshooting of network connectivity issues, identifying and resolving hardware and configuration-related faults.
• Implemented network security measures, including port security, access control lists (ACLs), and monitoring of network activity to protect against unauthorized access.

User Support and IT Service Operations.

• Provided technical support for end-users, handling both 1st and 2nd line support issues related to hardware, software, and network connectivity.
• Delivered remote support through RDP and Radmin tools, ensuring quick resolution of incidents, and minimizing user downtime.
• Managed and documented Service Desk tickets, maintaining accurate records of incidents, resolutions, and escalation processes.
• Provided user consultation and guidance on IT systems usage, access rights, and remote connection setups.

Information Security and Endpoint Protection Management.

• Ensured compliance with corporate information security policies and standards across the entire IT infrastructure.
• Applied security policies for user access control, network resource permissions, and endpoint hardening to minimize cybersecurity risks.
• Performed regular updates and patch management for antivirus databases and security applications to maintain an up-to-date defense posture.

Virtualization Infrastructure Management (VMware ESXi).

• Configured and administered virtualization environments using VMware ESXi, consolidating physical servers, and optimizing hardware resource utilization.
• Managed the virtual machines' lifecycle, including provisioning, resource allocation, and performance monitoring.

• Administration of Windows Servers (Windows Server 2012 R2, Windows Server 2016): Deployment, repair, and maintenance of office workstations, ensuring stable and uninterrupted operation of all user endpoints.
• Installed and administered the office LAN infrastructure, maintaining network stability and performance.
• Performed installation and maintenance of video surveillance systems, ensuring reliable operation and timely troubleshooting of CCTV equipment.
• Installed, configured, and provided technical support for retail hardware systems (POS terminals, scales, barcode scanners, card readers, MDTs).
• Provided user support and consultation on remote access solutions, including remote desktop administration and troubleshooting via RDP.

• Provided technical support for end-users related to workstation performance, software issues, and peripheral malfunctions.
• Installed and configured Windows operating systems (Windows 7, 10, 11) and essential business applications.
• Performed hardware diagnostics and repairs of desktop computers, including component-level troubleshooting (motherboards, RAM, power supplies, storage devices).
• Repaired and serviced printers, including mechanical troubleshooting.