Контактна інформація

Отримати контакти цього кандидата можна на сторінці https://www.work.ua/resumes/4142318/

Освіта

Ukrainian Engineering-Pedagogical Academy

Technological, Харків
Вища, з 2008 по 2012 (4 роки)

Знання і навички

• Proxmox VE
• Адміністрування Windows Server
• Virtualization

Знання мов

• Англійська — вище середнього
• Українська — вільно

Додаткова інформація

Pavlo Korolov — System Administrator | Infrastructure Engineer
Kharkiv, Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)

LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
Telegram: @korolov_paul

Summary

System Administrator with 8+ years of experience managing on-prem infrastructure for distributed teams. Hands-on background in Proxmox VE, pfSense, Windows Server, Linux, VoIP systems, backup strategy, system reliability, and operational checks. Focused on reliability, automation, and operational improvements, with a growing DevOps-oriented skill set.

TECH STACK

Virtualisation & Storage:
Proxmox VE (cluster, HA), CEPH, NAS sync & offsite backup

Networking:
pfSense (VPN, VLAN, firewall rules), MikroTik, OpenVPN (site-to-site & remote access)

Infrastructure:
Hetzner dedicated server, deployments, migrations, storage management

OS & Directory:
Windows Server 2012 - 2019 (AD, GPO, DNS/DHCP), Ubuntu Linux

Telephony:
3CX (PBX admin, SIP/trunk, IVR/CFD call flows, maintenance and health checks), FreePBX (VoIP call center)

Productivity & Collaboration:
Google Workspace (admin, policies, spam filtering), Microsoft 365 (Teams, licensing)

Automation & Scripting:
Workflow automation, Telegram bot pipelines

Monitoring & Observability:
Infrastructure status monitoring, backup health checks, proactive issue detection

Business Systems:
Greyhound CRM backend & integrations, Asana-based onboarding/offboarding workflows, Ringostat & Pipedrive implementation


Experience

GIPANIS GmbH / Laublust - IT Systems Administrator (Remote, Germany)
Jul 2022 - Dec 2025

- Managed a 4-node on-prem Proxmox cluster plus 1 Hetzner dedicated server, supporting business-critical services for 60+ distributed users across multiple locations.
- Implemented backup retention automation for Hetzner storage, eliminating recurring disk-full incidents and improving backup reliability.
- Managed pfSense for site-to-site and remote VPN, VLAN segmentation, and firewall policies across multiple locations and 60+ remote users.
- Administered 3CX PBX (trunk/SIP endpoints, weekly backups, updates); built custom CFD call flows with multi-level IVR, routing, and fallbacks.
- Maintained proactive weekly checks across 3CX, NAS, Google Drive Backup, and Greyhound CRM, ensuring early issue detection and consistent service availability.
- Centralised data collection for access provisioning and documented onboarding workflows end-to-end, reducing onboarding time by approximately 70% through standardised procedures for distributed teams.
- Initiated and implemented CEPH distributed storage across Proxmox nodes for shared VM storage and HA.
- Provided Google Workspace administration (accounts, policies, spam filtering) and Microsoft 365 support (Teams onboarding, license tracking).
- Managed Hikvision CCTV (NVR/cameras) and Kentix access control systems.
- Supported remote photo studio: workstations, network access, remote troubleshooting.

Transitional IT Support & Startup Technical Advisor - b-media (Buriak Media)
Feb 2022 - Jun 2022

- Provided transitional IT support to close legacy obligations for 2GIS customers.
- Joined former director's startup as a volunteer technical specialist, supporting infrastructure setup and early technical decisions.

2GIS Kharkiv - System Administrator
Aug 2017 - Feb 2022

- Supported IT infrastructure for 4 offices (Kharkiv, Kyiv, Dnipro, Kremenchuk) and 120+ workstations; provided on-site and remote support, including visits to branch offices.
- Managed technical relocation of offices during site moves: 2 relocations in Kyiv, 1 in Dnipro, and 1 office rebuild plus 2 relocations in Kharkiv; coordinated technical setup for opening the Kremenchuk office.
- Maintained Kharkiv office infrastructure across two physically separated premises connected in a single network; handled network design, office connectivity, and performance improvements.
- Orchestrated full-cycle hardware procurement: selected equipment and vendors, coordinated costs and delivery timelines, and aligned procurement budgets directly with the director.
- Windows Server operations: Active Directory, GPO, DNS, DHCP; user and workstation management, policy rollout.
- Deployed and maintained a FreePBX-based VoIP call center (inbound/outbound queues, routing).
- Built inter-office connectivity using MikroTik + OpenVPN (site-to-site and remote access VPN).

Self-directed Learning & Home Lab

Jan 2026 - Present

- Running Proxmox VE for infrastructure experimentation: virtualization, networking, backups, and LXC-based containerization.
- Developing Telegram bot automation pipelines and exploring workflow orchestration (n8n), aligning with DevOps practices.

Education

Ukrainian Engineering-Pedagogical Academy - Bachelor's Degree, Technological Faculty
Kharkiv, 2008 - 2012

Certifications

- Cisco IT Essentials: PC Hardware and Software

Languages

- English - B2/C1
- Ukrainian - Native
- Russian - Fluent