TsifroTech is an IT subsidiary of Rostelecom, Russia's national telecom operator. Scope of responsibility includes a critical federal-level digital infrastructure project spanning 100,000+ sites nationwide. ● Built a centralized Ansible inventory for 3,000+ VMs across two data centers; used by 10 administrators for centralized playbook execution and mass changes without manual per-server access. ● Administer the corporate Nextcloud portal (400+ users, Ubuntu). ● Deployed a pilot Nextcloud instance from scratch on Alt Linux — Docker, PostgreSQL, LDAP/AD integration, R7-Office — as a proof of concept for migrating the production portal to an import-substituted OS. ● Participated in deploying a backup monitoring and control site for a critical federal infrastructure project (September 2026): mounted and cabled network equipment, configured network addressing, verified operability. ● Use Ansible and Bash for infrastructure automation; Terraform for routine VM operations in Basis Dynamix. ● Maintain PostgreSQL: configured streaming replication, performed dump creation/restoration, log collection, and provisioned isolated test environments for the development team. ● Automated Kubernetes infrastructure operations: used Ansible playbooks to rebuild VMs with updated OS images and rejoin them to the cluster for a partner DevOps team.

Astra Linux Group develops the Astra Linux operating system and enterprise infrastructure software for corporate and government clients. ● Tested compatibility of 50+ hardware models and 20+ software products with the Astra Linux ecosystem (SE, Termidesk, RuPost, Astra Disk, Mobile); over 60 solutions successfully passed the Ready for Astra certification program as a result. ● Extended the Git-based test scenario library from 5 to 15+ scripts, automating standard software checks and reducing average configuration testing time from 6 hours to 1.5–2 hours. ● Deployed and maintained test environments using VirtualBox and Vagrant to verify software and infrastructure component compatibility. ● Configured PostgreSQL, Nginx, Kaspersky Endpoint Security (KES), and Apache in test environments for specific validation scenarios. ● Localized and documented 30+ compatibility defects; prepared 60+ official technical protocols and test reports jointly with development teams and external vendors.

Samsung SDS is Samsung Group's IT division. Work was based at Samsung R&D Institute Russia, a research center within Samsung Research. ● Grew from supporting a single office (~60 users) to administering IT infrastructure across two offices (~500 users, 1,000 workstations, 100 servers) — Linux/Windows, Active Directory, VMware vSphere, network infrastructure, and security systems. ● Provisioned and maintained ~80 GPU workstations and 40 Supermicro servers for AI/ML teams: OS installation, NVIDIA/CUDA drivers, hardware diagnostics, and component replacement. ● Built ~10 standardized Ubuntu and Windows images using Clonezilla and VirtualBox — cut new workstation deployment time from 2 hours to 15 minutes. ● As part of a 4-engineer team, completed a server infrastructure relocation between buildings over two weeks: four racks and ~80 GPU workstations; responsible for mounting, cabling, and commissioning. ● Relocation completed with zero data loss and no downtime for the main office.