Contact information

You can get this candidate's contact information from https://www.work.ua/resumes/4142318/

Education

Ukrainian Engineering-Pedagogical Academy

Technological, Харків
Higher, from 2008 to 2012 (4 years)

Knowledge and skills

• Proxmox VE
• Адміністрування Windows Server
• Virtualization

Language proficiencies

• English — above average
• Ukrainian — fluent

Additional information

# PAVLO KOROLOV
**System Administrator | Infrastructure Engineer**
Kharkiv, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section) | Telegram: @korolov_paul

## SUMMARY
System Administrator with 8+ years of experience supporting distributed teams and multi-office
IT infrastructure.
Managed a 4-node Proxmox VE cluster, CEPH shared storage, a Hetzner dedicated server, and
infrastructure for 60+ distributed users across multiple locations.
Also supported 4 offices with 120+ workstations, Windows Server environments, networking,
VPN, backups, VoIP, and operational automation.
Focused on reliability, standardization, proactive monitoring, and practical DevOps-oriented
improvements.

## CORE EXPERTISE
- **Virtualization & Storage:** Proxmox VE, CEPH, High Availability, LXC, NAS sync, offsite
backups
- **Networking:** pfSense, MikroTik, OpenVPN, VLAN, firewalling, site-to-site and
remote-access VPN
- **Windows & Directory Services:** Windows Server 2012–2019, Active Directory, GPO, DNS,
DHCP
- **Linux & Infrastructure:** Ubuntu Linux, Hetzner dedicated servers, migrations, storage
management
- **Telephony:** 3CX, FreePBX, SIP/trunks, IVR, CFD call flows, VoIP call centers
- **Automation & Monitoring:** n8n, Telegram bot pipelines, backup health checks, proactive
infrastructure monitoring
- **Collaboration & Business Systems:** Google Workspace, Microsoft 365, Greyhound CRM,
Asana, Ringostat, Pipedrive

## PROFESSIONAL EXPERIENCE

### IT Systems Administrator — GIPANIS GmbH / Laublust
**Remote, Germany | Jul 2022 – Dec 2025**

- Managed a 4-node Proxmox VE cluster and a Hetzner dedicated server, supporting
business-critical services for 60+ distributed users across multiple locations.
- Initiated and implemented CEPH distributed storage across Proxmox nodes, enabling shared
VM storage and high availability.
- Implemented backup retention automation for Hetzner storage, eliminating recurring disk-full
incidents and improving backup reliability.
- Administered pfSense firewalls, site-to-site and remote-access VPNs, VLAN segmentation,
and firewall policies across multiple locations and 60+ remote users.
- Centralized access provisioning and documented end-to-end onboarding workflows, reducing
onboarding time by approximately 70%.
- Administered 3CX PBX: SIP/trunk endpoints, updates, weekly backups, and custom CFD call
flows with multi-level IVR, routing, and fallbacks.
- Performed proactive weekly checks across 3CX, NAS, Google Drive Backup, and Greyhound
CRM to detect issues early and maintain service availability.
- Managed Google Workspace accounts, policies, and spam filtering; supported Microsoft 365
Teams onboarding and license tracking.
- Managed Hikvision CCTV systems and Kentix access control; supported a remote photo
studio with workstation and network troubleshooting.

### Transitional IT Support & Technical Advisor — b-media (Buriak Media)
**Feb 2022 – Jun 2022**

- Provided transitional IT support to close legacy obligations for 2GIS customers.
- Supported infrastructure setup and early technical decisions as a volunteer technical specialist
in the former director’s startup.

### System Administrator — 2GIS Kharkiv
**Aug 2017 – Feb 2022**

- Supported IT infrastructure across 4 offices in Kharkiv, Kyiv, Dnipro, and Kremenchuk,
including 120+ workstations and on-site/remote support.
- Administered Windows Server, Active Directory, GPO, DNS, and DHCP; managed users,
workstations, and policy rollout.
- Built inter-office connectivity using MikroTik and OpenVPN for site-to-site and remote access;
maintained a unified network across two separate Kharkiv premises.
- Deployed and maintained a FreePBX-based VoIP call center with inbound/outbound queues
and call routing.
- Managed 5 office relocations, a Kharkiv office rebuild, and technical setup for the Kremenchuk
office opening.
- Coordinated hardware procurement, vendor selection, delivery timelines, and budgets directly
with the director.

## SELF-DIRECTED LEARNING & HOME LAB
**Jan 2026 – Present**

- Running a Proxmox VE home lab for virtualization, networking, backups, and LXC-based
containerization.
- Developing Telegram bot automation pipelines and workflow orchestration with n8n.
- Building practical experience in infrastructure automation, monitoring, and DevOps-oriented
workflows.

## EDUCATION & CERTIFICATION
**Ukrainian Engineering-Pedagogical Academy**
Bachelor’s Degree, Technological Faculty | Kharkiv | 2008–2012
**Cisco IT Essentials: PC Hardware and Software**

## LANGUAGES
- English: B2/C1
- Ukrainian: Native
- Russian: Fluent