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Kiril Korniienko
System Administrator

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[open contact info](look above in the "contact info" section)
Kyiv, Ukraine
Remote

PROFESSIONAL SUMMARY
Linux-focused System Administrator with almost 2 years of experience managing Windows and Linux infrastructure
(250+ users, 20+ servers). Delivered network segmentation, monitoring and SIEM deployment (Zabbix and Wazuh via
Ansible), OpenVPN setup from scratch, production Moodle with AD integration, and automation scripts that save
hours of manual work. Seeking a remote Linux administration role with growth toward DevOps.

WORK EXPERIENCE

Apr 2025 – Nov 2026 | Astra Cosmetic | System Administrator

• Wrote Bash and Python scripts to automate routine tasks; one script cut a developer’s hour-long routine
down to about 2 minutes.
• Deployed Zabbix monitoring and Wazuh security monitoring, rolling out agents to all servers with Ansible.
• Set up OpenVPN from scratch for secure remote access to company resources.
• Implemented VLAN segmentation for a branch office and documented the full network (topology, VLAN/IP
registries, device passports, Git-versioned configs with weekly automated backup).
• Deployed production Moodle with LDAP/Active Directory authentication, OpenVPN and Zabbix integration.
• Maintained and upgraded an existing corporate mail server, adjusting configurations after each update to
keep mail delivery stable.
• Built a Bash/Python pipeline for EspoCRM backups: downloads, unpacks, adjusts configuration and database,
sanitizes data and repackages a new backup.
• Fixed slow call setup (20+ seconds) and connection errors in self-hosted Nextcloud Talk by deploying a high-
performance backend.
• Configured Ubuntu servers with nftables, netplan and dnsmasq; administered Active Directory and Hyper-V
virtualization.
• Evaluated offline AI/OCR models for structuring product data; tested Ollama in Docker.

SKILLS

• Linux and automation: Ubuntu, Bash, Python, Ansible, Git, Docker
• Monitoring and security: Zabbix, Wazuh, nftables, OpenVPN
• Networking: VLAN, netplan, dnsmasq, inter-VLAN routing
• Windows and virtualization: Windows Server, Active Directory, Hyper-V
• Services: Moodle, Nextcloud, mail server administration, backups

LANGUAGES English (B1, Intermediate) | Ukrainian (native)