Андрій

Andrii Zerkal
System & Network Administrator | WebUI Developer
Phone: [open contact info](look above in the "contact info" section) | Email: [open contact info](look above in the "contact info" section)
Telegram: @andrii_zerkal | Discord: andriilviv
Military Status: Does not require employer reservation.

Professional Summary
System and Network Administrator with hands-on experience managing IT infrastructure across multiple office and retail
locations. Experienced in administering 500+ network devices, including MikroTik, Ruijie/Reyee, Dahua, and Hikvision
equipment, as well as supporting 200+ workstations and POS-related devices.
Strong practical knowledge of Windows, Windows Server, Active Directory, networking, VPNs, VLANs, DHCP, DNS, firewalls,
Wi-Fi infrastructure, virtualization, databases, and video surveillance systems. Background in installation engineering and
low-current systems, combined with additional training in web development and DevOps.
Quick to adapt to new technologies, troubleshoot complex technical issues, and work effectively both independently and as
part of a team.

Technical Skills
Operating Systems & System Administration
Microsoft Windows 10/11, Windows Server, Active Directory, Group Policy (GPO), DNS, DHCP, IIS, Remote Desktop Services
(RDP), Windows Services, Event Viewer, User & Permission Management, NTFS Permissions, BitLocker, Windows
Deployment, System Monitoring, Troubleshooting, Backup & Recovery.
Networking & Infrastructure
TCP/IP, IPv4/IPv6, DNS, DHCP, NAT, VLAN, VPN, Routing, Switching, Firewall Configuration, Port Forwarding, Wi-Fi,
LAN/WAN, Network Monitoring, Network Security, Remote Network Administration.
MikroTik
RouterOS, RouterBOARD, WinBox, CAPsMAN, Wireless, VLAN, Bridge, Routing, DHCP Server/Client, DNS, NAT, Firewall,
Mangle, Address Lists, VPN, IPsec, OpenVPN, SSTP, L2TP, PPP, Port Forwarding, Traffic Management, Network Monitoring,
Remote Administration.
Network Equipment
MikroTik, Ruijie/Reyee, TP-Link, Ubiquiti, network switches, routers, access points, PoE equipment.
Wi-Fi & Wireless
802.11a/b/g/n/ac/ax, 2.4 GHz / 5 GHz, SSID Management, Channel Planning, Roaming, CAPsMAN, Access Point Deployment,
Wireless Security, Signal Optimization, Interference Troubleshooting.
Video Surveillance & Security Systems
Dahua, Satel, AJAX, Hikvision, SmartPSS, iVMS, NVR/DVR, IP Cameras, CCTV Deployment, Camera Configuration, Video
Recording, Remote Access, Motion Detection, Line Crossing, Intrusion Detection, SMD, Network Video Troubleshooting.
Servers, Virtualization & Databases
Windows Server, Linux/Unix, Docker, Hyper-V, Remote Administration, Backup & Recovery, Microsoft SQL Server, MySQL,
PostgreSQL, SQL, Database Administration, Backup & Restore, Basic Database Troubleshooting.
IT Infrastructure & Hardware
PC Assembly & Maintenance, Hardware Diagnostics, Printers, POS Systems, Receipt Printers, Barcode Scanners, Label
Printers, UPS, Peripheral Devices, Hardware Troubleshooting, IT Asset Management.
Security, Monitoring & Support
Active Directory, Group Policy, User and Access Management, Firewall, VPN, Network Security, Authentication, Permissions
Management, Network/System Monitoring, Remote Support, Incident Troubleshooting, Performance Monitoring, Log
Analysis, Preventive Maintenance, Technical Documentation, IT Support.
Development & Web Technologies
HTML5, CSS3, JavaScript, TypeScript, Node.js, React, Redux, AJAX, Babel, React Router, Material UI, WordPress, Express.js,
REST API.
Tools & Methodologies
Git, Docker, DevOps, Microsoft Office, Linux/Unix Systems, PaaS, SonarCloud, Agile, Scrum, GTD, Teamwork, Incident
Management.

Professional Experience
System and Network Administrator
May 2025 – Present
• Manage the installation, configuration, maintenance, and technical support of IT infrastructure across office and retail
locations, including 200+ PCs, printers, receipt printers, and barcode scanners.
• Administer and maintain network infrastructure consisting of 500+ devices, including MikroTik, Dahua, Hikvision, and
Ruijie equipment.
 • Deploy, configure, troubleshoot, and provide ongoing support for network infrastructure and connectivity across multiple
sites.
• Install, configure, and maintain video surveillance systems for office and retail environments.
• Administer and maintain servers and databases, perform routine maintenance, monitor system performance, and
troubleshoot technical issues.
• Provide technical support to users and ensure the stable and reliable operation of hardware, software, and network
services.
Installation Engineer — Proektlink LLC
2019 – April 2025
• Designed and installed video surveillance and alarm systems.
• Configured and maintained low-current networks for commercial and residential properties.
• Conducted testing and configured hardware and software to ensure optimal system performance.
• Supervised the installation and deployment of complex low-current networks, ensuring quality and timely delivery.

Education
Taras Shevchenko National University of Kyiv
Faculty of Geography, Department of Economic and Social Geography
Program: Regional Development Management (Incomplete)
September 2002 – June 2006

Additional Education & Certifications
• WebUI Engineer Course — SoftServe IT Academy (Dec 2023 – Feb 2025)
• Java Programming Basics — Prometheus Platform
• Software Testing Fundamentals — Prometheus Platform
• Dahua Certification — Video Surveillance Systems, IP Cameras, NVR/DVR Configuration
• Hikvision Certification — Video Surveillance Systems, IP Cameras, NVR/DVR Configuration
• Ruijie/Reyee Certification — Network Infrastructure, Routing, Switching, Wi-Fi Networks
• Ajax Systems Certification — Security Systems, Hubs, Sensors, Devices, System Configuration
• Additional professional certifications and training related to system administration, networking, video surveillance, and IT
infrastructure.
WebUI course focus: HTML, CSS, JavaScript, Databases, DevOps, React, practical development, project-based learning.

Languages
Ukrainian: Native
English: Intermediate

Additional Information
Continuously develop skills in system administration, networking, cybersecurity, virtualization, DevOps, and web
technologies.